Journal of Power Sources最新文献

Insight into the deformation features and capacity loss mechanisms of lithium-ion pouch cells under spherical indentation conditions 球形压痕条件下锂离子袋状电池的变形特征及容量损失机制研究

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-10 DOI: 10.1016/j.jpowsour.2025.237287

Xiaoqing Zhu , Yuxuan Wang , Hsin Wang , Ercan Cakmak , Xing Ju , Xue-wei Lu

{"title":"Insight into the deformation features and capacity loss mechanisms of lithium-ion pouch cells under spherical indentation conditions","authors":"Xiaoqing Zhu , Yuxuan Wang , Hsin Wang , Ercan Cakmak , Xing Ju , Xue-wei Lu","doi":"10.1016/j.jpowsour.2025.237287","DOIUrl":"10.1016/j.jpowsour.2025.237287","url":null,"abstract":"<div><div>Mechanical deformation under extreme conditions is one of the important reasons for the failure of lithium-ion batteries in automotive application. However, the deformation features and component failure of lithium-ion cells to external loading has never been a design consideration. Here, we conduct spherical indentation tests on a dozen of lithium-ion cells with different capacities under different control mode conditions to investigate their deformation features and capacity loss mechanisms. The experimental results show that, under mechanical deformation conditions, internal faults of cells occur in stages, and energy accumulation and sudden release are two key processes of cell's mechanical failure. The cells' state of charge is the main factor affecting their thermal runaway behaviors. In addition, a finite element model is developed to simulate the deformation features and the failure mechanism of key components of lithium-ion pouch cells; the 3D x-ray computed tomography is employed to demonstrate its internal configuration. With this model, the force-strain response, the deformation features as well as the size of the failure area of lithium-ion cells under spherical indentation conditions are accurately predicted. In 3D x-ray computed tomography images, unique mud cracks in cooper current collector are observed, and the influence mechanisms of the isolated fragments on the cell capacities are revealed. These results may provide useful information for the mechanical structure design of the components of lithium-ion pouch cells.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237287"},"PeriodicalIF":8.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial functionalization with cyclic ethers enables subzero temperature operation for safer quasi-solid lithium-ion electrolytes 与循环醚的界面功能化可以使准固态锂离子电解质在零度以下的温度下运行

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-10 DOI: 10.1016/j.jpowsour.2025.237177

Annie Y. Sun , Nestor R. Levin , Nicolas L. Simi, Vilas G. Pol

{"title":"Interfacial functionalization with cyclic ethers enables subzero temperature operation for safer quasi-solid lithium-ion electrolytes","authors":"Annie Y. Sun , Nestor R. Levin , Nicolas L. Simi, Vilas G. Pol","doi":"10.1016/j.jpowsour.2025.237177","DOIUrl":"10.1016/j.jpowsour.2025.237177","url":null,"abstract":"<div><div>Despite the continual surge in demand for energy storage in a variety of application spaces and increasingly extreme conditions, Li-ion batteries (LIBs) and particularly solid-state electrolytes (SSEs) have long been limited to room temperature operation. Substantial improvements to SSE performance at low temperature (<0 °C) are required. In this work, we propose a highly facile method of cyclic ether functionalization of a composite solid polymer electrolyte to prepare a quasi-solid-state electrolyte that enables low-temperature operation. The functionalization enhances bulk ionic conductivity by over an order of magnitude, creates highly conformal interfacial contact points, and enables fast Li<sup>+</sup> transport through weak ion complexation at the interface. Consequently, the cyclic-ether functionalized quasi-solid-state electrolyte demonstrates excellent electrochemical performance in a Li || LiFePO<sub>4</sub> cell from 0 to −25 °C and provides >91 % capacity retention after 100 cycles at −25 °C. This study demonstrates a widely generalizable strategy of interfacial modification to advance the development of SSE systems for low-temperature operation.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237177"},"PeriodicalIF":8.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

State-of-the-art review of degradation mechanisms of commercial lithium-ion batteries 商用锂离子电池降解机制的最新研究进展

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-10 DOI: 10.1016/j.jpowsour.2025.237242

Dong Hyup Jeon , Sangwon Kim , Rolf Hempelmann

{"title":"State-of-the-art review of degradation mechanisms of commercial lithium-ion batteries","authors":"Dong Hyup Jeon , Sangwon Kim , Rolf Hempelmann","doi":"10.1016/j.jpowsour.2025.237242","DOIUrl":"10.1016/j.jpowsour.2025.237242","url":null,"abstract":"<div><div>The widespread application of lithium-ion batteries (LiBs) in consumer electronics to large-scale transport and energy storage underscores the necessity of understanding commercial battery degradation mechanisms. While studies have been primarily focused on enhancing safety, lifecycle, and power output, the fundamental processes and degradation mechanisms remain obscure. LiBs experience complex and multi-coupled degradation, especially in commercial applications like electric vehicles, where rapid detection and clear understanding of aging mechanisms are critical. The growing literature on this topic necessitates a comprehensive summary of the latest insights. Here, we address commercial LiB degradation, highlighting recent progress in identifying causes and mitigation strategies. Mechanisms responsible for commercial LiB degradation are classified into five distinct categories, each illustrating their mutual interactions and the constraints imposed by current technological advancements. This review provides an in-depth summary of current knowledge to foster a deeper understanding of degradation mechanisms.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237242"},"PeriodicalIF":8.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-purification and surface-coordination dual-polymer/Li6.4La3Zr1.4Ta0.6O12 interphase achieves Li+-transport-enhanced composite solid-state electrolyte 自净化和表面配位双聚合物/Li6.4La3Zr1.4Ta0.6O12界面相实现Li+输运增强复合固态电解质

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-10 DOI: 10.1016/j.jpowsour.2025.237289

Yaqin Ji , Haoran Du , Kang Wang , Jian Ma , Wenjuan Yang , Xulai Yang , Zhenzhen Liu , Xin Liang , Huaxia Deng , Hongfa Xiang

{"title":"Self-purification and surface-coordination dual-polymer/Li6.4La3Zr1.4Ta0.6O12 interphase achieves Li+-transport-enhanced composite solid-state electrolyte","authors":"Yaqin Ji , Haoran Du , Kang Wang , Jian Ma , Wenjuan Yang , Xulai Yang , Zhenzhen Liu , Xin Liang , Huaxia Deng , Hongfa Xiang","doi":"10.1016/j.jpowsour.2025.237289","DOIUrl":"10.1016/j.jpowsour.2025.237289","url":null,"abstract":"<div><div>Li<sub>6.4</sub>La<sub>3</sub>Zr<sub>1.4</sub>Ta<sub>0.6</sub>O<sub>12</sub> (LLZTO) is one of the most widely used solid electrolytes for solid-state lithium-ion batteries (SSLIBs). However, this ceramics-type solid electrolyte suffers from poor interfacial contact and impure surface phase, causing large interfacial resistance and hindering Li<sup>+</sup> transport. In this study, a binary polymer solution acting as a self-purification and surface-coordination agent, consisting of polyacrylonitrile (PAN) and poly (vinylidene fluoride-co-chlorotrifluoroethylene) (PC), are mixed with LLZTO to form a Li<sup>+</sup>-transport-enhanced solid-state composite electrolyte. PC effectively eliminates the Li<sub>2</sub>CO<sub>3</sub> impurity to form in-situ LiF coating on LLZTO particles. Simultaneously, the –CN groups in PAN establish coordination bonds with LLZTO, creating fast Li<sup>+</sup> transport channels at the polymer/ceramic interphase. In addition, the introduced flexible polymer phase enhances the interfacial contact between electrodes and electrolyte. The optimized polymer/LLZTO interphase enables the as-prepared solid-state composite electrolyte to deliver excellent electrochemical performances. The assembled quasi-solid-state Li||LiFePO<sub>4</sub> cells stably work at 0.5 C (1 C = 170 mA g<sup>−1</sup>) for >300 cycles at 60 °C and >600 cycles at room temperature, respectively. The Li||Li cell also shows a cycling life of >2000 h at 0.1 mA cm<sup>−2</sup> and 0.1 mAh cm<sup>−2</sup>. This strategy effectively improves Li <sup>+</sup> migration on the polymer/LLZTO interphase, providing a new approach for next-generation SSLIBs.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237289"},"PeriodicalIF":8.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced water management by construction of ZrO2-Based hydrophilic channels in microporous layers for high-performance proton exchange membrane fuel cell 在高性能质子交换膜燃料电池微孔层中构建基于zro2的亲水性通道以增强水管理

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-10 DOI: 10.1016/j.jpowsour.2025.237239

He Liu , Zhilong Chang , Fengyang Dong , Jingjing Zhang , Biao Wang

{"title":"Enhanced water management by construction of ZrO2-Based hydrophilic channels in microporous layers for high-performance proton exchange membrane fuel cell","authors":"He Liu , Zhilong Chang , Fengyang Dong , Jingjing Zhang , Biao Wang","doi":"10.1016/j.jpowsour.2025.237239","DOIUrl":"10.1016/j.jpowsour.2025.237239","url":null,"abstract":"<div><div>Effective water management is crucial for achieving high performance proton exchange membrane fuel cell (PEMFC) under various operating conditions. However, addressing the challenges of maintaining proton conductivity and preventing electrode flooding under fluctuating humidification remains difficult. In this study, a method is employed to address the issue by creating hydrophilic sites within the hydrophobic network of the microporous layer (MPL). On one hand, as preferred channel to guide liquid water through MPL, the incorporated hydrophilic ZrO<sub>2</sub> powder facilitates water expelling under wet conditions, while keeping other pores coated with hydrophobic polytetrafluoroethylene (PTFE) as gas diffussion routes. On the other hand, the ZrO<sub>2</sub> could adsorb water to hydrate the membrane, and thus demonstrating a self-humidifying effect under low-humidity conditions and enhances the performance of the PEMFC. The distribution and content of hydrophilic sites in the MPL are explored to investigate their impact on cell performance under varying humidity conditions. The results showed that when hydrophilic sites occupy 50 wt% of the total hydrophobic carbon powder and are uniformly distributed in the MPL, the performance is optimal. Under low and high relative humidity conditions, the peak power density of the cell increased by 22 % and 20 % compared without ZrO<sub>2</sub>, respectively. These findings indicate that the MPL with a self-humidifying effect under low humidity and water/gas separation capability under high humidity can enhance mass transfer and energy efficiency, offering a promising strategy for optimizing PEMFC water management.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237239"},"PeriodicalIF":8.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved reversibility and kinetics of oxygen redox reaction in Na2Mn3O7 by dual-site regulation strategy 双位点调控策略提高了Na2Mn3O7中氧氧化还原反应的可逆性和动力学

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-09 DOI: 10.1016/j.jpowsour.2025.237290

Yuxuan Liu , Dongxiao Wang , Qingyang Song , Yitong Zhou , Yingchun Lyu , Chengjun Zhu , Shuyin Xu

{"title":"Improved reversibility and kinetics of oxygen redox reaction in Na2Mn3O7 by dual-site regulation strategy","authors":"Yuxuan Liu , Dongxiao Wang , Qingyang Song , Yitong Zhou , Yingchun Lyu , Chengjun Zhu , Shuyin Xu","doi":"10.1016/j.jpowsour.2025.237290","DOIUrl":"10.1016/j.jpowsour.2025.237290","url":null,"abstract":"<div><div>Enhancing structural stability under high voltage is essential for design of sodium-ion batteries with high energy density and cycling stability. Layered oxides possesses non-bonding O 2p orbitals contribute to extra capacity from oxygen redox reaction (ORR). Nevertheless, the irreversibility of ORR and structural evolution result in capacity decline, voltage hysteresis, and inferior kinetics. Here, dual-site regulation strategy is applied in Na<sub>2</sub>Mn<sub>3</sub>O<sub>7</sub>. A strategic incorporation of Li<sup>+</sup> and Ti<sup>4+</sup> into alkali and transition-metal layers, respectively, to activate higher capacity and enhance structural stability. Combination of X-ray diffraction (XRD) and pair distribution function refinement results confirms the crystal structure. <em>In-situ</em> XRD shows that Na<sub>1.65</sub>Li<sub>0.35</sub> [Mn<sub>2.5</sub>Ti<sub>0.5</sub>]O<sub>7-δ</sub> (NLMT35) undergoes less phase transitions, indicating better structural stability. In addition, hard X-ray absorption, soft X-ray absorption and X-ray photoelectron spectra analysis reveal the reductive coupling mechanism of electron transfer from oxygen to manganese ions, boosting the reversibility and kinetics of anionic redox reactions. Consequently, the NLMT35 delivers an initial capacity of 171 mAh g<sup>−1</sup>, among which the reversible oxygen redox capacity increased by 49 % and the polarization decreased by 36 %, ensuring a capacity retention of 93 % after 200 cycles in full cells. This finding facilitates the development of reliable ORR-based cathode materials with high energy efficiency.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237290"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The precise control and maintenance of sites distribution endow PtCu3 intermetallic with sustainably superior CO resilience 位点分布的精确控制和维护使PtCu3金属间化合物具有持续优异的CO弹性

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-09 DOI: 10.1016/j.jpowsour.2025.237284

Zhixiang Chen , Jinhui Huang , Qihai He , Qi Sun , Song Li , Weiyue Zhao , Zheng Chen

{"title":"The precise control and maintenance of sites distribution endow PtCu3 intermetallic with sustainably superior CO resilience","authors":"Zhixiang Chen , Jinhui Huang , Qihai He , Qi Sun , Song Li , Weiyue Zhao , Zheng Chen","doi":"10.1016/j.jpowsour.2025.237284","DOIUrl":"10.1016/j.jpowsour.2025.237284","url":null,"abstract":"<div><div>Establishing persistent solution to the sluggish kinetics of methanol oxidation reaction (MOR) and the susceptibility of catalysts to CO poisoning is pivotal yet challenging step toward the practical application of direct methanol fuel cells (DMFCs). Inspired by “bifunctional mechanism”, an efficient O-PtCu<sub>3</sub>/DMC intermetallic MOR catalyst with the stable structure of isolated Pt site surrounded by 12 nearest neighbor Cu atoms are designed. The MOR specific/mass activity of O-PtCu<sub>3</sub>/DMC reaches up to 1.48/1.32 and 6.75/6.49 times that of the disordered counterpart D-PtCu<sub>3</sub>/DMC and commercial Pt/C, while simultaneously exhibiting exceptional stability. Furthermore, the onset potential for CO oxidation on O-PtCu<sub>3</sub>/DMC is substantially lowered by 50 mV and 104 mV compared to D-PtCu<sub>3</sub>/DMC and Pt/C. Theoretical calculations reveal that the ordered atomic arrangement in O-PtCu<sub>3</sub>/DMC creates adjacent adsorption sites with optimal binding strength for dual key intermediates (∗CO and ∗OH), thereby facilitating the reduction of the reaction energy barrier in the rate-determining CO oxidation step. The inherent structural stability of the intermetallic ensures the sustained integrity of the elaborately customized surface featuring adjacent dual-intermediates sites, enabling O-PtCu<sub>3</sub> to maintain long-term high MOR activity and exceptional CO resilience. This study provides crucial insights into the atomic-level rational design of electrocatalysts based on reaction mechanisms.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237284"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication and evaluation of binder-free metal-molybdate electrodes for improved energy storage and hydrogen evolution applications 用于改进储能和析氢应用的无粘结剂金属钼酸盐电极的制造和评价

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-09 DOI: 10.1016/j.jpowsour.2025.237185

Sajid Ali Ansari

{"title":"Fabrication and evaluation of binder-free metal-molybdate electrodes for improved energy storage and hydrogen evolution applications","authors":"Sajid Ali Ansari","doi":"10.1016/j.jpowsour.2025.237185","DOIUrl":"10.1016/j.jpowsour.2025.237185","url":null,"abstract":"<div><div>The investigation focuses on the development, comprehensive characterization, and electrochemical testing of three novel binder-free electrodes based on nickel (Ni), manganese (Mn), and molybdenum dioxide (MoO<sub>4</sub>) on three dimensional nickel foam (3DNF): 3DMn-MoO<sub>4</sub>@3DNF, 3DNi-MoO<sub>4</sub>@3DNF, and 3DNi/Mn-MoO<sub>4</sub>@3DNF. These electrodes are synthesized via hydrothermal methods, followed by annealing to form 3D metal-molybdate structures on nickel foam substrates. Hexamethylenetetramine (HMTA) and urea serve as directing agents, controlling the morphology and structural growth of the nanosheets. Advanced characterization techniques confirm the presence of nickel and manganese molybdate phases, providing insights into their crystal structures, surface morphologies, and elemental compositions. Electrochemical testing, including cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy, reveals that the 3DNi/Mn-MoO<sub>4</sub>@3DNF electrode exhibits the highest specific capacitance at 2710.0 F/g and the lowest hydrogen evolution overpotential at 249 mV. This superior performance is attributed to the synergistic effects of nickel and manganese ions and the optimized microstructure, enhancing active site availability and electron and ion transport. The study demonstrates the critical role of synthesis conditions and directing agents such as urea and HMTA in influencing nanosheet morphology, thereby affecting the electrodes' porosity, surface area, and electrochemical activity, highlighting their potential in energy storage and conversion applications.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237185"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

2D CuO materials with superior photoelectrochemical performances for water splitting 具有优异光电化学性能的二维CuO材料

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-09 DOI: 10.1016/j.jpowsour.2025.237283

Guanhua Lin, Moyi Xie, Gang Chen

{"title":"2D CuO materials with superior photoelectrochemical performances for water splitting","authors":"Guanhua Lin, Moyi Xie, Gang Chen","doi":"10.1016/j.jpowsour.2025.237283","DOIUrl":"10.1016/j.jpowsour.2025.237283","url":null,"abstract":"<div><div>Photoelectrochemical (PEC) water splitting have emerged as promising methods for achieving solar-to-chemical conversion. Therefore, we develop a facile one-pot thermal synthetic method for controllable synthesis of CuO plates, CuO sheets and CuO particles for preparing photoelectrochemical systems. Interestingly, CuO sheets and CuO plates display better activity than CuO particles in electrocatalytic water oxidation, as the required overpotential for 10 mA/cm<sup>2</sup> is 170 mV, 200 mV and 470 mV, respectively. Their superior catalytic performances are due to lower bandgap energy, higher conductivity, and larger active surface area. Further investigations suggest that CuO sheets and CuO plates possess more numbers of carriers, which can lead to improvement of charge transport, a faster carrier transfer rate and higher efficiency of charge separation. Then, three photoelectrochemical systems based on these three CuO materials and TiO<sub>2</sub> film have been designed for photocatalytic water splitting. The photocurrent and the generation rate of oxygen for CuO sheets and CuO plates systems are relative higher than that of CuO particles. Deep studies reveal that, their superior photoelectrochemical performances are attributed to the following factors: higher efficiency of hole-electron separation, enhanced charge transfer rate, higher concentration of carriers and conductivity, reduced defect, and decreased electron-hole recombination rate.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237283"},"PeriodicalIF":8.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quaternized polybenzimidazole efficiently regulates the distribution of phosphate in high-temperature proton exchange membrane fuel cells 季铵化聚苯并咪唑能有效调节磷酸盐在高温质子交换膜燃料电池中的分布

IF 8.1 2区工程技术

Journal of Power Sources Pub Date : 2025-05-08 DOI: 10.1016/j.jpowsour.2025.237153

Yong Yu , Feng Ji , Shaojie Gao , Chengwei Deng , Bowen Zheng , Weiwei Cai

{"title":"Quaternized polybenzimidazole efficiently regulates the distribution of phosphate in high-temperature proton exchange membrane fuel cells","authors":"Yong Yu , Feng Ji , Shaojie Gao , Chengwei Deng , Bowen Zheng , Weiwei Cai","doi":"10.1016/j.jpowsour.2025.237153","DOIUrl":"10.1016/j.jpowsour.2025.237153","url":null,"abstract":"<div><div>High-temperature proton exchange membrane fuel cells (HT-PEMFCs) exhibit strong tolerance to impurities in hydrogen, which enhances their potential for practical applications. However, the efficiency of gas, proton, and electron electrocatalytic interfaces remains suboptimal, leading to sluggish cathode reaction kinetics and significantly reducing platinum (Pt) utilization. In this study, quaternary ammonium-functionalized polybenzimidazole (QAPBI), where the quaternary ammonium groups form strong ion pair interactions with phosphate, is employed as a bifunctional ionomer in the cathode catalyst layer (CL). This modification facilitates the regulation of phosphate (PA) distribution within the cathode CL and simultaneously improves proton conduction efficiency. Consequently, well-structured three-phase interfaces are effectively established, and the adsorption of PA onto the catalyst surface is minimized, further enhancing Pt utilization. More importantly, the rapid adsorption of PA onto QAPBI reduces the migration and loss of PA during fuel cell operation, thereby enhancing long-term durability. As a result, the peak power density (PPD) of the QAPBI-based HT-PEMFC is increased by 42 % compared to conventional PTFE-based designs, with a corresponding improvement in durability of 37.5 %.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"646 ","pages":"Article 237153"},"PeriodicalIF":8.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0