20 January 2026, Volume 50 Issue 1

    

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Review
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  Application of fluorinated polymers in lithium metal batteries

  BAI Yumin, QI Lizhen, QIAN Zhengyang, WANG Jiaxiang, ZHOU Xunxun, LIU Xu, ZHAO Yumeng, WANG Aoxuan

  Chinese Journal of Power Sources. 2026, 50(1): 2-11. https://doi.org/10.3969/j.issn.1002-087X.2026.01.001

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  Lithium metal anode is considered to be the “holy grail” in the field of energy storage batteries due to its high specific capacity (3 860 mAh/g) and the lowest reduction potential (–3.04 V vs. standard hydrogen electrode), but the large number of dendrites generated on the surface of lithium metal anode during charge and discharge lead to decline in battery Coulombic efficiency and cycling performance. Furthermore, the uncontrollable growth of lithium dendrites easily punctures the separator, cause battery short circuit, and even battery explosion and other safety problems. Based on the main challenges of lithium metal anode, combined with the application of fluoropolymer in lithium metal batteries in recent years, this review demonstrates the important role of fluoropolymer in lithium metal batteries from the aspects of solid state electrolyte, separator modification layer, binder, artificial solid electrolyte interface (SEI) layer, composite anode, etc. Finally, the future research direction and development trend of fluoropolymer in the field of lithium metal are prospected.
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  Research progress on carbon coating on the surface of lithium iron phosphate cathode materials

  ZHANG Fan, ZHANG Yimin, LIU Yang, LIU Jichao, LIU Yao, ZHENG Xiaodong, LIN Jiawei, HUO Huixin, HUANG Guozhi, REN Danhui, GUO Peng

  Chinese Journal of Power Sources. 2026, 50(1): 12-19. https://doi.org/10.3969/j.issn.1002-087X.2026.01.002

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  Lithium iron phosphate (LiFePO₄) with olivine structure has the advantages of high safety, long cycle life and low cost. However, the low conductivity caused by intrinsic defects in its crystal structure limits its widespread application. Carbon coating can effectively improve the conductivity of LiFePO₄ and is the core strategy to enhance its electrochemical performance. This article reviews the research progress of carbon coating on the surface of LiFePO₄ and summarizes the methods of carbon coating, types of carbon sources and optimization strategies for carbon coating.
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  Advances in thermal management and control strategies for energy storage batteries

  YU Hongfeng, CAO Yangyang, XU Chenglin, SHAO Yujie, LI Huanhuan

  Chinese Journal of Power Sources. 2026, 50(1): 20-32. https://doi.org/10.3969/j.issn.1002-087X.2026.01.003

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  The global energy consumption is constantly increasing, and electrochemical new energy storage systems play a key role in balancing energy supply and demand. With the expansion of the scale of new energy storage systems, temperature problems caused by system operation have greatly affected the performance and safe use of the systems. Reasonable thermal management schemes and system control strategies can maintain the stability and safety of energy storage system operation. Starting from the thermal management requirements of energy storage systems, this paper analyzes the characteristics and applications of mainstream thermal management solutions, summarizes the future development trends of various solutions, and focuses on introducing temperature control strategies for energy storage systems. Finally, suggestions and prospects for future research directions in energy storage thermal management technology are provided.
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  Research progress on characteristic properties of high entropy oxides and their applications in aqueous zinc ion batteries

  YANG Deyi, LI Wei, LIANG Qiuqun, PENG Rui, CAO Yuyuan, CHEN Qizhi, ZHANG Xiuhua, LIU Zheng

  Chinese Journal of Power Sources. 2026, 50(1): 33-40. https://doi.org/10.3969/j.issn.1002-087X.2026.01.004

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  Compared with traditional alloys, high-entropy alloys have attracted significant attention due to their unique mechanical properties, excellent wear resistance, remarkable corrosion resistance, and outstanding structural stability, while also demonstrating great potential in electromagnetic and catalytic applications. This review systematically summarizes recent advances in the innovative application of high-entropy oxides (High entropy oxide,HEOs) in aqueous zinc-ion batteries. The pivotal role of HEOs in enhancing energy density and cycling stability of zinc-ion batteries is first elucidated. Four typical synthesis methods (mechanical alloying, arc melting, solution combustion, and co-precipitation) are then analyzed in detail regarding their technical characteristics. Special emphasis is placed on elucidating the four characteristic effects (high-entropy effect, lattice distortion effect, sluggish diffusion effect, and cocktail effect) and their synergistic mechanisms in HEOs. Furthermore, the influence of elemental doping strategies on electrochemical performance is thoroughly discussed, along with perspectives on future development directions of HEOs for zinc-ion battery energy storage.
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  Analysis of standards and development trend outlook of power batteries between China and Japan

  LI Fangfang, YANG Xue, LI Xueyang, ZHANG Bin

  Chinese Journal of Power Sources. 2026, 50(1): 41-47. https://doi.org/10.3969/j.issn.1002-087X.2026.01.005

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  This article systematically analyzes the current status of the new energy vehicle power battery standard systems in China and Japan, and focuses on conducting a difference analysis and cause dissection in aspects such as safety requirement standards and test conditions. It also analyzes the development trends of power batteries between China and Japan, and puts forward development suggestions.The competition and cooperation space in the standards and technical paths of power batteries between China and Japan were analyzed, providing an important perspective for the standardization and technological innovation of the global new energy vehicle industry.
Research and design: Chemicalpower sources
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  Biomass-carbon composite LiMn_0.6Fe_0.4PO₄/C cathode material and its electrochemical properties

  QIN Xiaokang, HUANG Xiaowei, YE Chao, ZHOU Naigen

  Chinese Journal of Power Sources. 2026, 50(1): 48-55. https://doi.org/10.3969/j.issn.1002-087X.2026.01.006

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  Lithium manganese iron phosphate (LiMn_xFe_1–xPO₄, LMFP) with olivine structure has received rising attention from scholars as a representative of the new generation of energy storage materials. However, the inherent limitations of its structure-lower electronic and ionic conductivities and slow electrochemical reaction kinetics-raise an unavoidable challenge for its further development and application. An economical and environmentally friendly method was used by employing N-doped biomass carbon extracted from grapefruit peel powder (CP) as a conductivity enhancer to address the shortcomings of LMFP. The LMFP/C nanoparticles were effectively anchored onto the irregular nanosheet structure of the N-doped carbon, resulting in the successful synthesis of LMFP/C-CP3 composites. This one-stone approach establishes an efficient electron transport network while utilizing the excellent electrical conductivity of N-doped biomass carbon and mitigating particle agglomeration. Experimental results underscore the effectiveness of our approach. The LMFP/C-CP3 composite has a high discharge capacity of 152.14 mAh/g at a current density of 0.1 C, and the capacity retention rate after 500 charge/discharge cycles at 1 C is as high as 95.6%, indicating remarkable cycling stability.
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  Effect of Mg-Ti co-doping on performance for Ni-rich cathode materials

  GAO Yongen, HOU Shuandi

  Chinese Journal of Power Sources. 2026, 50(1): 56-64. https://doi.org/10.3969/j.issn.1002-087X.2026.01.007

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  To enhance the cycling performance of Ni-rich cathode materials, a series of Ni-rich cathode materials co-doped with Mg and Ti in different proportions were synthesized via a co-precipitation combined method with high-temperature solid-phase method. The results show that Mg-Ti co-doping can inhibit the volume shrinkage caused by lattice deformation, enhance the structural stability of Ni-rich cathode materials, thereby suppressing the occurrence of irreversible phase transitions during cycling and reducing the formation of microcracks. The Ni-rich cathode material modified by Mg-Ti co-doping has excellent cycle life and rate capability. When the doping ratio of Mg-Ti is 0.3%, the capacity retention rate of the Ni-rich material after 100 cycles at 1 C between 2.75~4.3 V is 89.14%. The discharge specific capacities at 3 C and 5 C rates are 178.73 and 174.35 mAh/g, respectively.
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  Development of silica-nanofiber-reinforced PEO-based solid-state electrolytes and their electrochemical performance in lithium ion batteries

  GUO Qin, TANG Wenwen, MAO Li, ZHANG Jingmei, CHEN Zijiao, LI Xuemei, HOU Chunjing

  Chinese Journal of Power Sources. 2026, 50(1): 65-73. https://doi.org/10.3969/j.issn.1002-087X.2026.01.008

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  The S-PEO/LiTFSI composite solid-state electrolyte was constructed via integration of flexible SiO₂ nanofiber membranes with a PEO/LiTFSI matrix through solution coating, demonstrated significant enhancements in thermomechanical properties: tensile strength (1.50 MPa) and elongation at break (21%) surpassed the PEO/LiTFSI counterpart (1.02 MPa, 18%), concomitant with an elevated melting transition temperature (55.1 ℃ vs. 50.5 ℃). Electrochemical characterization revealed a room temperature ionic conductivity of 1.3×10^–4 S/cm at 30 ℃—representing a tenfold improvement over the control—with reduced activation energy (0.712 eV vs. 0.952 eV). Performance evaluation demonstrated: Li||S-PEO/LiTFSI||Li symmetric cells maintained voltage hysteresis stability (24.8±0.2) mV through 1 100 cycles at 60 ℃; LiFePO₄||S-PEO/LiTFSI||Li full cells exhibited substantially diminished overpotentials (44 mV@0.1 C, 59 mV@0.2 C vs. 99 mV, 141 mV control) while delivering discharge capacities of 127 mAh/g@0.8 C and 100 mAh/g@1 C. These improvements are attributed to the three-dimensional SiO₂ network, which enhances ion transport pathways, provides mechanical reinforcement, and optimizes electrode-electrolyte interfacial stability.
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  Preparation and performance study of NCM811 dry electrodes

  ZHANG Qi, CHEN Liang, LIU Zhaoping

  Chinese Journal of Power Sources. 2026, 50(1): 74-79. https://doi.org/10.3969/j.issn.1002-087X.2026.01.009

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  To achieve a fully solvent-free, drying-free and continuously producible dry electrode fabrication process, this study replaces the screw extruder with a turbine stirrer to successfully fabricate NCM811 dry electrodes. Systematic characterizations, including microstructural and electrochemical performance analyses, reveals that PTFE fiberization is more pronounced under directional shear forces, however, high-speed stirring induces agglomeration of the binder and conductive agent. This agglomeration reduces the degree of fiberization within the electrodes, necessitating a higher binder content that results in pore blockage and poor electrolyte wettability. Compared to wet electrodes, the dry electrodes exhibit significantly diminished rate capability; while wet electrodes can achieve a capacity of 100 mAh/g at 2 C, the capacity of the dry electrodes is nearly zero under similar conditions.
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  Preparation and modification of graphene-based cathode composites for lithium-sulfur batteries

  ZHAO Yanhong, ZHANG Weimin, LIN Shuang, WU Tao, SONG Guotao

  Chinese Journal of Power Sources. 2026, 50(1): 80-85. https://doi.org/10.3969/j.issn.1002-087X.2026.01.010

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  Graphene was used as a sulfur carrier to synthesize G/S composite via the ball milling-melting method. Then, as a contrast sample, the composite was modified by metal oxide, and the state of the graphene sulfur materials and the modified composite were all characterized. We tested the performances of the sample battery. The results showed that the specific capacity of the composite before modification was 1 141 mAh/g, and after modification it was 1 256 mAh/g, the specific capacity was increased by 10.08% after modification, and the cycle performance is also significantly improved.
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  Research on thermal runaway characteristics and combustion behavior of lithium iron phosphate batteries

  WANG Yu, WANG Yan, ZHANG Zhaozhi, LI Han, ZHANG Xilong, DAI Feng

  Chinese Journal of Power Sources. 2026, 50(1): 86-93. https://doi.org/10.3969/j.issn.1002-087X.2026.01.011

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  Under the background of the steady implementation of the dual carbon strategy and the global energy transformation, large-capacity lithium iron phosphate battery is widely used in battery energy storage power stations(BESS) due to its advantages such as high energy density and long life. However, the jet fire caused by thermal runaway of battery seriously restricts the further development of BESS. Delaying and preventing the group failure of battery modules under the influence of flame is a key concern. At present, there are few studies on thermal runaway combustion of large capacity batteries and related key thermal runaway variation parameters. It is clear that the variation of each parameter in the process of battery thermal runaway is the premise of putting forward the suppression scheme. Thermal runaway experiments were carried out on 100 Ah single cell and four-cell module to explore the characteristic quantities such as temperature, heat release rate, mass loss and expansion force. The results show that the single-cell battery thermal runaway jet combustion exhibits a blowout phenomenon, with a maximum heat release rate of 20.6 kW and total heat release of 4.2 MJ. During the thermal spread process of the four-cell module, the maximum heat release rate reaches 76.9 kW and total heat release reaches 33.2 MJ. The research findings provide theoretical references for fire early warning, suppression, and firefighting in energy storage power stations.
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  Temperature estimation of lithium ion batteries based on improved empirical thermal model

  YANG Jufeng, HU Zilong, XIA Wei, MA Mina, WU Xu, ZHUANG Shenglun, LI Huanhuan

  Chinese Journal of Power Sources. 2026, 50(1): 94-99. https://doi.org/10.3969/j.issn.1002-087X.2026.01.012

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  Accurate monitoring of the battery temperature is crucial for battery life and safety. However, due to the limitations of existing sensor technologies and testing methods, it is difficult to obtain the temperature of each cell in a battery pack. To overcome this issue, this study proposes an online estimation method for the temperature of lithium-ion batteries based on an improved empirical thermal model. A simplified empirical model is proposed based on the lumped-mass model, without the complicated experiments to obtain the thermal model parameters of the battery. The proposed model demonstrates the advantages of the simple model structure and the high computational efficiency. Meanwhile, the particle swarm optimization algorithm is used to identify the model parameters in different intervals of battery states of charge, which improves the interpretability and the adaptability of the model. The verification results show that the proposed method exhibits the satisfying estimation accuracy for both battery datasets under different operating conditions and ambient temperatures, and the root mean square errors of the estimated temperature are overall within 0.67 ℃.
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  Influence of cruise pressure rate on performance and safety of ternary lithium battery

  CUI Qingkang

  Chinese Journal of Power Sources. 2026, 50(1): 100-109. https://doi.org/10.3969/j.issn.1002-087X.2026.01.013

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  With the rapid development of electric aircraft, lithium batteries will face the test of cyclic performance and safety in cruising low-pressure flight conditions. The effects of different discharge rates (3 C, 5 C, 7 C) at normal pressure (95 kPa) and cruise low pressure (30 kPa) on the cycle performance and thermal safety characteristics of ternary lithium batteries were investigated experimentally. The results show that the combination of low air pressure and high rate significantly increases the risk of battery aging and thermal safety. After 200 cycles, the capacity retention rate of the high power rate (7 C) battery at 30 kPa decreased to 85.94%, and the DC internal resistance increased to 59.68%, which was much higher than the normal pressure environment. Battery cell disassembly and dQ/dV analysis showed that the low pressure and high power rate synergistic accelerated the electrode structural damage and active lithium loss. High rate discharge at low pressure leads to a significant increase in surface temperature (up to 107.1 ℃ at 7 C), the heat transfer coefficient and heat transfer capacity have decreased, exacerbating the risk of heat accumulation. The thermal runaway experiment shows that the thermal runaway triggering temperature and time of the battery are lower at normal pressure, while the initial thermal runaway temperature is increased at low pressure, the maximum temperature rise is decreased, and the potential thermal hazard concealment is enhanced.
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  Numerical investigation of labyrinthine flow channel design effects on thermal performance in direct cooling thermal management systems

  WANG Zeyu, LI Xiaojie, LI Gang, ZHANG Wentao, LI Le

  Chinese Journal of Power Sources. 2026, 50(1): 110-120. https://doi.org/10.3969/j.issn.1002-087X.2026.01.014

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  This study proposes a symmetric labyrinth flow channel aimed to address uneven cooling and high flow resistance in direct cooling battery thermal management systems. A CFD-based two-phase fluid-solid-thermal coupling model was developed to analyze how channel width, fillet radius, and refrigerant mass flow affect cooling performance and energy consumption. The results indicate that, in comparison with conventional serpentine channels, the proposed labyrinth design reduces the maximum cell temperature by 1.99 ℃ and the peak temperature difference between cells by 0.97 ℃under C-rates ranging from 1 C to 4 C, while simultaneously decreasing the pressure drop by 57%-78%. Optimal channel width balances heat dissipation and flow resistance. Increasing fillet radius reduces local resistance but excessive values impair boiling heat transfer. A critical mass flow saturation point exists beyond which thermal improvement diminishes while energy consumption surges. The research reveals the coupling mechanism of structural and operational parameters on thermal-energy performance, and establishes design guidelines for cold plates. These findings provide theoretical foundations and practical references for developing high-efficiency direct cooling systems.
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  Design and analysis of influencing factors for a parallel serpentine liquid-cooling channel structure

  WEI Jin, LIU Shaohu

  Chinese Journal of Power Sources. 2026, 50(1): 121-128. https://doi.org/10.3969/j.issn.1002-087X.2026.01.015

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  In response to the challenges associated with uneven temperature distribution in square lithium ion batteries, this paper proposes a parallel serpentine liquid cooling channel structure and evaluates its heat dissipation performance in comparison with traditional serpentine channel structures and conventional parallel channel structures. By analyzing the effects of three factors—namely, the mass flow rate of the coolant at the inlet, the inlet temperature, and the thickness of the liquid cooling plate—on the heat dissipation performance of the parallel serpentine channel structure, and employing orthogonal experiments and range analysis, this study ranks the significance of these three influencing factors to ascertain the optimal parameter combination. The research findings indicate that the heat dissipation performance of the optimized parallel serpentine channel structure is significantly enhanced, with the maximum temperature difference of the battery pack reduced by 63.9% and the pressure drop decreased by 7.7% in comparison to the original model. This study serves as a reference for the development of thermal management systems that offer improved heat dissipation performance and reduced energy consumption.
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  Health diagnosis of rail transit vehicle batteries using Transformer-XGBoost-based multi-view data analysis

  WANG Jian, MAO Jian, TANG Chaowei, SUN Xiaokang, HOU Xiaoshuang, WANG Chunsheng, LIAO Yinqin

  Chinese Journal of Power Sources. 2026, 50(1): 129-142. https://doi.org/10.3969/j.issn.1002-087X.2026.01.016

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  Lithium-ion batteries have been extensively employed in rail transit and energy storage systems due to their high energy density and long cycle life. However, their state of health (SOH) gradually deteriorates with increasing charge-discharge cycles, posing safety risks and maintenance challenges for battery management. Conventional SOH prediction approaches predominantly rely on single-view incremental capacity analysis (ICA) or standard data-driven models, which struggle to fully capture the multiscale variations in electrochemical characteristics and temporal dynamics during battery degradation. This limitation hinders both prediction accuracy and robustness. To address these challenges, this paper proposes an SOH prediction method based on multi-view data analysis. By integrating information from incremental capacity (IC) curves under both voltage and temporal views, multi-view health indicators (HI) are constructed. A prediction framework combining Transformer and extreme gradient boosting (XGBoost) is then designed. In this framework, the Transformer incorporates a dynamic time-window adjustment and a dual-scale attention mechanism to adaptively extract temporal features at different degradation stages. Meanwhile, XGBoost introduces physical constraints to enhance prediction stability and robustness. On the PL13 battery training dataset from the University of Maryland, the proposed method achieves a root mean square error (RMSE) of only 3.13×10^-3 and a coefficient of determination (R²) of 0.997. On the PL11 battery testing dataset, the method maintains a low RMSE of 4.57×10^-3 and an R² of 0.994, demonstrating its superior performance in multi-view feature fusion and dynamic temporal modeling.
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  Influencing factors exploration and prevention recommendations for weak voltage of thermal batteries

  LU Ya, MENG Jian, ZHOU Ying, YANG Xiaoyu, DUAN Qizhi, QI Chongjun

  Chinese Journal of Power Sources. 2026, 50(1): 143-146. https://doi.org/10.3969/j.issn.1002-087X.2026.01.017

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  In order to avoid the interference of excessive weak voltage with the system before activation of the thermal battery, experimental exploration was conducted on factors such as storage high temperature time, storage temperature, theoretical output voltage, design diaphragm thickness of the thermal battery, and test requirement. As a result, the weak voltage value of the thermal battery increases with the time of high temperature storage (less change after it's stabilization). It also increases with the higher storage temperature. The weak voltage value of the thermal battery is positively correlated with its operating voltage, and negatively correlated with its internal resistance. It also has a positive correlation with the voltage divider resistance of the test equipment. Finally, based on the obtained affecting factors on the weak voltage value of the thermal battery, feasible suggestions were proposed to avoid interference of thermal battery's weak voltage on the system.
Research and design: Physical power sources
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  Research on high-safety isolated power supply technology based on vertical multi-junction laser photovoltaic cells

  NI Wang, XIONG Qiaopo, LONG Gen, LI Bing, LV Zhaochen, WAN Ronghua, YU Zhihang, LIU Xingjiang

  Chinese Journal of Power Sources. 2026, 50(1): 147-153. https://doi.org/10.3969/j.issn.1002-087X.2026.01.018

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  Laser fiber power supply technology, characterized by its superior immunity to interference and high safety, represents an effective approach for powering sensing devices in strong electromagnetic environments. Addressing the existing challenges of low efficiency and low power density in current laser isolation power supply systems, this paper proposes a design method for a high-power laser isolation power supply module based on vertical multi-junction laser photovoltaic (PV) cells. Receiving modules for the high-power laser isolation power supply system were fabricated using vertical 4-junction and 6-junction laser PV cell devices. A laser isolation power supply system was designed and developed. Utilizing a 5 V laser isolation power supply receiving module, an output electrical power of 10.82 W was achieved under an input electrical power of 45.30 W, resulting in a system electrical-to-electrical conversion efficiency of 23.88%. This design methodology provides significant reference value for the field of laser isolation power supply technology.
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  Simulation research on bandgap structure of GaAs solar cells

  YAO Liyong, LI Jianjun

  Chinese Journal of Power Sources. 2026, 50(1): 154-159. https://doi.org/10.3969/j.issn.1002-087X.2026.01.019

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  III-V solar cells, typified by GaAs solar cells, exhibits excellent photovoltaic properties and hold significant application value in space platforms such as satellites. However, current III-V solar cells face challenges including high production costs and performance degradation under space radiation. This work investigates incorporating Al into GaAs to form AlGaAs with a deliberately engineered compositional gradient by varying Al/Ga ratio, thereby establishing a graded bandgap to enhance photovoltaic performance. Numerical simulations indicate that, across reduced minority-carrier lifetime, the graded-bandgap architecture mitigates performance losses. In particular, it substantially enhances the collection of photo-generated electrons originating from long-wavelength absorption, thereby alleviating the short circuit current density penalty. These results highlight the significance of bandgap grading for improving the performance of low-quality GaAs cells and for strengthening the radiation resistance of III-V multijunction solar cells.
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  Numerical analysis of MACa_0.5Ge_0.5I₃/MACa_0.125Ge_0.875I₃ homogeneous perovskite solar cells

  GAN Yongjin, GUO Yangyan, ZHOU Yuting, CHEN Duoyu

  Chinese Journal of Power Sources. 2026, 50(1): 160-169. https://doi.org/10.3969/j.issn.1002-087X.2026.01.020

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  A dual active layer homojunction PSC with a structure of SnO₂/MACa_0.5Ge_0.5I₃/MACa_0.125Ge_0.875I₃/Cu₂O was proposed based on the one-dimensional solar cell numerical simulation software SCAPS. The effects of perovskite layer thickness and defect density, metal back electrode work function, and temperature on cell performance were studied by controlling variables. The simulation results show that an increase in the thickness of the perovskite layer leads to a decrease in the open circuit voltage and filling factor, while the short-circuit current density gradually increases. Compared with the thickness change of the MACa_0.5Ge_0.5I₃ layer, the thickness change of MACa_0.125Ge_0.875I₃ has a more significant impact on the open circuit voltage. The cell performance deteriorates continuously with the increase of defect density in the perovskite layer. Compared with the MACa_0.5Ge_0.5I₃ layer, the change in defect density in the MACa_0.125Ge_0.875I₃ layer has a more significant impact on the open circuit voltage. The increase in the work function of the metal back electrode promotes the enhancement of the built-in electric field in the device, thereby promoting the improvement of the open circuit voltage. And the increase in temperature promotes the increase in device recombination rate, leading to an increase in internal friction and thus suppressing the high performance output of the cell.0
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  Reliability study of glass-backsheet TOPCon modules based on different encapsulation films

  WU Wei, LV Lin, ZHANG Yan, FU Chenggang, DENG Xin, WANG Jingjing, HONG Yudan, AN Chao

  Chinese Journal of Power Sources. 2026, 50(1): 170-178. https://doi.org/10.3969/j.issn.1002-087X.2026.01.021

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  To address the reliability of N-type glass-backsheet TOPCon PV modules under high temperature and high humidity environments due to hydrolysis-induced corrosion of encapsulating adhesive film, this study systematically evaluated the physicochemical properties of EPE, EVA and acetate-modified adhesive film (peel strength, crosslinking, water vapor transmission rate, acid value) and combined them with the accelerated damp-heat (DH) and potentiostatic-induced degradation (PID) tests of the modules, the study investigated the impact of encapsulation adhesive films on module performance. The results showed that DH test significantly increased the water vapor transmission rate and acid value of the film, and exacerbated the decrease of peel strength and cross-linking degree of the film. Under the same type of film, the acetate-resistant adhesive film showed less degradation of various properties, and it was found that moisture was a necessary condition for inducing corrosion. The key findings are: double-sided acetic acid-resistant adhesive film package can effectively inhibit acetic acid-moisture synergistic corrosion, after 2000 h of DH testing, the power degradation of the corresponding module is only 3.79%, much lower than the double EVA package module 12.75%, and the gate line corrosion is significantly reduced, the three rounds of PID test attenuation as low as 1.57%. This provides an effective strategy to enhance the wet-heat reliability of TOPCon modules by optimizing the encapsulation material.