Journal of Power Sources最新文献_第2页

High-performance SAnPEK membranes with selective porogen-induced ion transport channels for aqueous organic redox flow batteries 高性能SAnPEK膜与选择性孔隙诱导离子传输通道的水有机氧化还原液流电池

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-03 DOI: 10.1016/j.jpowsour.2025.238549

Songwei Zhang , Bengui Zhang , Qian Liu , Zhenfeng Sun , Chao Yang , Tao Li , Yuchao Yang , Zhihan Song , Jingjun He , Feixiang Zhai , Enlei Zhang , Kangjun Wang

{"title":"High-performance SAnPEK membranes with selective porogen-induced ion transport channels for aqueous organic redox flow batteries","authors":"Songwei Zhang , Bengui Zhang , Qian Liu , Zhenfeng Sun , Chao Yang , Tao Li , Yuchao Yang , Zhihan Song , Jingjun He , Feixiang Zhai , Enlei Zhang , Kangjun Wang","doi":"10.1016/j.jpowsour.2025.238549","DOIUrl":"10.1016/j.jpowsour.2025.238549","url":null,"abstract":"<div><div>Aqueous organic redox flow batteries (AORFBs) have attracted extensive attention as a promising energy storage technology, but they still face challenges in developing high-performance membranes, especially membranes with high ionic conductivity, selectivity, and excellent stability. In this work, a new strategy of selective porogen-induced ion transport channels formation is used to construct highly conductive and selective ion transport channels in low-sulfonated SAnPEK membranes. The original SAnPEK-virgin membrane exhibits a high area resistance of 0.93 Ωcm<sup>2</sup>. The SAnPEK-3 membrane, which is made by adding only 1.82 wt% of the selective porogen sodium p-hydroxybenzenesulfonate, exhibits a low area resistance of 0.257 Ωcm<sup>2</sup>, which is 37.6 % of the SAnPEK-virgin membrane and even lower than the benchmark Nafion212 membrane (0.276 Ωcm<sup>2</sup>). The SAnPEK-3 membrane also exhibits excellent selectivity and high mechanical strength (39.2 MPa). In AORFB, the SAnPEK-3 membrane shows an energy efficiency of up to 91.47 % at 40 mA cm<sup>−2</sup>, which is better than the commercial Nafion117 membrane (82.95 %) and Nafion212 membrane (90.86 %). Moreover, the SAnPEK-3 membrane shows excellent cycle stability in 9600 cycle tests. The proposed method for preparing membranes with selective porogen-induced ion transfer channels can significantly improve membrane conductivity and is easy to scale up.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238549"},"PeriodicalIF":7.9,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218624","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 microenvironment modulation enabled by mass transfer control to achieve efficient CO2 electroreduction in acidic membrane electrode assembly electrolyzers 微环境调制使质传递控制实现高效的CO2电还原在酸性膜电极组装电解槽

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-03 DOI: 10.1016/j.jpowsour.2025.238551

Zhongyin Kang , Yang Wang , Min Zhang , Pengtao Yue , Jun Li , Qiang Liao , Qian Fu , Xun Zhu

{"title":"The microenvironment modulation enabled by mass transfer control to achieve efficient CO2 electroreduction in acidic membrane electrode assembly electrolyzers","authors":"Zhongyin Kang , Yang Wang , Min Zhang , Pengtao Yue , Jun Li , Qiang Liao , Qian Fu , Xun Zhu","doi":"10.1016/j.jpowsour.2025.238551","DOIUrl":"10.1016/j.jpowsour.2025.238551","url":null,"abstract":"<div><div>The utilization of zero-gap acidic membrane electrode assembly (MEA) electrolyzers for electrocatalytic CO<sub>2</sub> reduction presents a significant potential for practical application, owing to their capability to effectively mitigate salt precipitation on electrodes and minimize voltage losses. However, suppressing the hydrogen evolution reaction (HER) in an H<sup>+</sup>-rich environment remains a great challenge, demanding the development of advanced catalysts and precise modulation of the microenvironment. Here, we present an efficient strategy for converting CO<sub>2</sub> to CO using a Ni single-atom catalyst in acidic MEA-type electrolyzers. By controlling CO<sub>2</sub> and H<sup>+</sup> mass transfer distance to modulate the microenvironment near the catalyst, a Faradaic efficiency for CO of up to 91.3 % is achieved at 700 mA cm<sup>−2</sup> and a pH of 1. Remarkably, the carbon utilization efficiency reaches 75.9 %, which exceeds the performance of both alkaline and neutral systems. The results reveal that, with high K<sup>+</sup> concentration, moderate adjustment of mass transfer distance can optimize the distribution of CO<sub>2</sub> and H<sup>+</sup> within the catalyst layer. This optimization improves the local CO<sub>2</sub> concentration and impedes the H<sup>+</sup>-enrichment, thereby suppressing HER during acidic CO<sub>2</sub> electrolysis. This work may inspire further optimization of the microenvironment within the catalyst layer for electrochemical CO<sub>2</sub> reduction in acidic electrolysis.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238551"},"PeriodicalIF":7.9,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218771","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

Experimental study of the effects of ambient conditions on the performance of open-cathode PEM fuel cells 环境条件对开阴极PEM燃料电池性能影响的实验研究

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-03 DOI: 10.1016/j.jpowsour.2025.238467

Jorben Mus , Robbe Nuyttens , Maarten Vanierschot , Veerle Vandeginste , Frank Buysschaert

{"title":"Experimental study of the effects of ambient conditions on the performance of open-cathode PEM fuel cells","authors":"Jorben Mus , Robbe Nuyttens , Maarten Vanierschot , Veerle Vandeginste , Frank Buysschaert","doi":"10.1016/j.jpowsour.2025.238467","DOIUrl":"10.1016/j.jpowsour.2025.238467","url":null,"abstract":"<div><div>Open-cathode fuel cells (FCs) are promising for applications where simplicity, low mass, and compactness are critical, such as mobile, portable, and off-grid systems. Their simplified operating conditions management system (SOCMS) reduces system complexity and mass but may increase sensitivity to ambient air temperature and relative humidity (RH). Limited understanding of how these factors affect the performance of lightweight Proton Exchange Membrane (PEM) FCs, may explain their limited use in commercial applications. Therefore, this study aims to experimentally investigate the steady-state performance of a 250W PEMFC open-cathode system. The testbench, equipped with a climate chamber, exposes the FC to six ambient scenarios, ranging from 0 °C to 35 °C and 9% to 81% RH. The stack net power, temperature and fan power are evaluated and the gross power output is determined. The best net power was found at 35 °C and 75% RH, while the lowest was observed at 35 °C and 9% RH. The fan power affected the performance, particularly at high temperatures and high power levels. Overall performance deviations remained below 6%, confirming moderate robustness to ambient conditions. These insights can support the development of more robust control strategies for lightweight open-cathode FC systems, while also offering potential value for closed-cathode configurations.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238467"},"PeriodicalIF":7.9,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218590","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 impact of V2X on battery degradation: A quantitative review V2X对电池退化的影响：定量综述

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-03 DOI: 10.1016/j.jpowsour.2025.238482

Koen Linders , Samppa Jenu , Ari Hentunen , Gautham Ram Chandra Mouli

{"title":"The impact of V2X on battery degradation: A quantitative review","authors":"Koen Linders , Samppa Jenu , Ari Hentunen , Gautham Ram Chandra Mouli","doi":"10.1016/j.jpowsour.2025.238482","DOIUrl":"10.1016/j.jpowsour.2025.238482","url":null,"abstract":"<div><div>Vehicle-to-Everything (V2X) is a promising solution to support the energy transition, but concerns about battery degradation and capacity loss remain a major barrier for electric vehicle (EV) users. A clear understanding of degradation caused by V2X is essential to increase user confidence and encourage participation in V2X services. Many V2X studies have researched battery degradation, but the results vary widely between articles, making it hard to draw conclusions. Existing review articles mention the different outcomes but do not discuss the contradictions. In this article, a large set of V2X degradation studies is compared using a quantitative analysis. The yearly added degradation due to V2X is extracted from 37 V2X degradation papers, resulting in a set of 97 data points. The dataset is analysed to compare degradation in different situations and highlight contradictions in similar situations. Results show that the average yearly added degradation is 0.87% (95% CI: 0.35–1.4%). When degradation is explicitly considered in V2X service optimisation, the added degradation is limited to just 0.9% per year. Moreover, under specific conditions, V2X can even help reduce overall battery degradation by reducing calendar ageing. Temperature and SoC are especially important in assessing the benefit of V2X on calendar ageing, but these factors are most often overlooked. This review has highlighted common shortcomings in V2X degradation literature that affect the assessment of the impact of degradation. The results can be used to clear up misconceptions about degradation in V2X and to guide future research directions.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238482"},"PeriodicalIF":7.9,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218767","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

[hk1]–oriented 1D Sb2S3 nanorod array as high–performance photoanode for solar water splitting [hk1]定向1D Sb2S3纳米棒阵列作为太阳能水分解的高性能光阳极

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-03 DOI: 10.1016/j.jpowsour.2025.238489

Ying-Chu Chen , Chia-Hsing Ku , Yu-Kuei Hsu

{"title":"[hk1]–oriented 1D Sb2S3 nanorod array as high–performance photoanode for solar water splitting","authors":"Ying-Chu Chen , Chia-Hsing Ku , Yu-Kuei Hsu","doi":"10.1016/j.jpowsour.2025.238489","DOIUrl":"10.1016/j.jpowsour.2025.238489","url":null,"abstract":"<div><div>Sluggish charge transport kinetics and significant optical loss are known to severely limit the photoelectrochemical activity of the antimony sulfide (Sb<sub>2</sub>S<sub>3</sub>) for solar water splitting. Those issue are, however, well addressed in the present contribution via the morphology control and crystallographic texturization, which are simultaneously achieved using the gold–coated fluorine–doped tin oxide (Au@FTO) coated glass substrate as the back contact to Sb<sub>2</sub>S<sub>3</sub>. As–obtained Sb<sub>2</sub>S<sub>3</sub>/Au@FTO exhibits a preferred [<em>hk</em>1] orientation to accelerate the charge transport and rod–like nanostructure to scatter the incident light, leading to the optical path length markedly increased. Benefitting from such enhanced light harvesting ability of Sb<sub>2</sub>S<sub>3</sub>/Au@FTO, numerous photoexcited electron–hole pairs are generated while their recombination loss is substantially quenched by the facile carrier transport kinetics. Their synergistic effect enhances the photocurrent density delivered by Sb<sub>2</sub>S<sub>3</sub>/Au@FTO, which amounts to ∼2.3 mA cm<sup>−2</sup>, far exceeding those deposited on the bare and titanium dioxide–coated FTO substrates, which are additionally prepared as the counterparts of Sb<sub>2</sub>S<sub>3</sub>/Au@FTO for comparison. More importantly, such superiority is further seen when comparing with those of additional Sb<sub>2</sub>S<sub>3</sub>–based photoelectrodes reported in the literature, by which is its great promise well corroborated.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238489"},"PeriodicalIF":7.9,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218731","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

Dual-functional palladium-cobalt nitride on exfoliated nitrogen-doped carbon nanotubes for efficient ammonia electro-oxidation in solid acid electrolysis cells toward carbon-free hydrogen production 脱片状氮掺杂碳纳米管上的双功能氮化钯钴在固体酸电解电池中高效氨电氧化以实现无碳制氢

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-02 DOI: 10.1016/j.jpowsour.2025.238540

Jungseub Ha , Sandya Rani Mangishetti , Sanghwa Jeong , Sehun Choi , Subin Kim , Minguk Kwak , Junbeom Maeng , Jeongbin Cho , Sujin Kim , Yongju Yun , Won Bae Kim

{"title":"Dual-functional palladium-cobalt nitride on exfoliated nitrogen-doped carbon nanotubes for efficient ammonia electro-oxidation in solid acid electrolysis cells toward carbon-free hydrogen production","authors":"Jungseub Ha , Sandya Rani Mangishetti , Sanghwa Jeong , Sehun Choi , Subin Kim , Minguk Kwak , Junbeom Maeng , Jeongbin Cho , Sujin Kim , Yongju Yun , Won Bae Kim","doi":"10.1016/j.jpowsour.2025.238540","DOIUrl":"10.1016/j.jpowsour.2025.238540","url":null,"abstract":"<div><div>Electrochemical oxidation of gas-phase ammonia (NH<sub>3</sub>) in solid acid electrolysis cells (SAECs) is a promising approach for producing carbon-free hydrogen (H<sub>2</sub>), but its efficiency is dependent on advanced anode catalysts. This study presents a dual functional palladium–cobalt nitride supported on nitrogen doped, partially exfoliated carbon nanotubes (Pd-CoN<sub>x</sub>/N-PECNT) and systematically evaluates its performance for NH<sub>3</sub> electrolysis in SAECs. The N-PECNT support increases electrical conductivity and basicity, stabilizes the nanoscale architecture, and facilitates electron donation to Pd-CoN<sub>x</sub>, while interfacial structure modulation strengthens adsorption and dehydrogenation pathways that govern ammonia oxidation. Relative to the comparison anode catalysts used in this study, Pd-CoN<sub>x</sub>/N-PECNT shows an H<sub>2</sub> production rate of 296.7 mmol g<sub>cat</sub><sup>−1</sup> h<sup>−1</sup> at 30 mA cm<sup>−2</sup> and a Faradaic efficiency of 99.6 % at 10 mA cm<sup>−2</sup>, together with a lower onset potential, faster charge transfer, the lowest operating overpotential, and stable operation for 10 h. Taken together, these results indicate that Pd-CoN<sub>x</sub>/N-PECNT enables efficient, durable NH<sub>3</sub> electrolysis in SAECs and provides a practical route for scalable H<sub>2</sub> production.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238540"},"PeriodicalIF":7.9,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218630","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

Interface modification of imidazolium ionic liquid toward efficient and stable carbon-electroded CsPbI2Br perovskite solar cells 咪唑离子液体对高效稳定碳电CsPbI2Br钙钛矿太阳能电池的界面改性

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-02 DOI: 10.1016/j.jpowsour.2025.238495

Siyuan Zhang , Ying Li , Jincheng Huang , Shimin Li , Zixian Wang , Zhuoyin Peng , Jianlin Chen , Jian Chen

{"title":"Interface modification of imidazolium ionic liquid toward efficient and stable carbon-electroded CsPbI2Br perovskite solar cells","authors":"Siyuan Zhang , Ying Li , Jincheng Huang , Shimin Li , Zixian Wang , Zhuoyin Peng , Jianlin Chen , Jian Chen","doi":"10.1016/j.jpowsour.2025.238495","DOIUrl":"10.1016/j.jpowsour.2025.238495","url":null,"abstract":"<div><div>The hole-transport-layer-free (HTL-free) carbon-electrode CsPbI<sub>2</sub>Br perovskite solar cells (PSCs) have garnered significant interest due to their process compatibility and excellent stability. Nevertheless, surface and grain boundary defects in perovskite films inevitably serve as non-radiative recombination sites, critically limiting device performance. Herein, an interface engineering strategy employing 1-benzyl-3-methylimidazolium chloride is proposed to restructure the perovskite/carbon interface in HTL-free architectures. The results demonstrated that the ionic liquid effectively passivate the defects on the surface of the perovskite film, associated with reduced defects, enhanced carrier transport, and induced hydrophobicity properties, thereby improving the overall performance of the perovskite solar cells. The modified carbon-based perovskite solar cell device, in the absence of a hole transport layer, exhibits a champion PCE of 13.96 %, with <em>V</em><sub><em>OC</em></sub> of 1.25 V, <em>J</em><sub><em>SC</em></sub> of 14.88 mA cm<sup>−2</sup>, and <em>FF</em> of 75 %. Moreover, the unencapsulated 1-3-MIMCl-modified device retained 84.7 % of its initial efficiency after 1200 h in a glove box, demonstrating superior long-term stability compared to the control device.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238495"},"PeriodicalIF":7.9,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218772","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

Interface engineering with halide anion ionic liquids: A strategy to enhance the efficiency and stability of carbon-based all-inorganic CsPbBr3 perovskite solar cells 卤化物阴离子液体界面工程：提高碳基全无机CsPbBr3钙钛矿太阳能电池效率和稳定性的策略

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-02 DOI: 10.1016/j.jpowsour.2025.238513

Mingyue Liao , Sheng Tang , Jia Liu , Tao Wu , Weihai Sun , Jihuai Wu , Yiming Xie , Canzhong Lu

{"title":"Interface engineering with halide anion ionic liquids: A strategy to enhance the efficiency and stability of carbon-based all-inorganic CsPbBr3 perovskite solar cells","authors":"Mingyue Liao , Sheng Tang , Jia Liu , Tao Wu , Weihai Sun , Jihuai Wu , Yiming Xie , Canzhong Lu","doi":"10.1016/j.jpowsour.2025.238513","DOIUrl":"10.1016/j.jpowsour.2025.238513","url":null,"abstract":"<div><div>Carbon-based all-inorganic CsPbBr<sub>3</sub> perovskite solar cells (PSCs) have garnered significant interest owing to their cost-effective production processes and exceptional thermal stability. Nonetheless, defects within CsPbBr<sub>3</sub> films and inefficient charge extraction in PSCs result in pronounced charge recombination, thereby reducing the overall device efficiency. Herein, the Pb<sup>2+</sup> and Cs<sup>+</sup> defects are simultaneously passivated by introducing halide anion ionic liquids at the interface between CsPbBr<sub>3</sub> and carbon, significantly improving film quality and crystallinity and prolong the average carrier lifetime. Moreover, the non-radiative recombination is efficiently inhibited in the film with reduced defects and enhanced light absorption capability, resulting in an enhancement of both open-circuit voltage (<em>V</em><sub><em>OC</em></sub>) and fill factor (FF). Finally, all-inorganic CsPbBr<sub>3</sub> PSCs passivated by BMIZ-Br ionic liquid achieved a superior efficiency of 9.34 % with a high <em>V</em><sub><em>OC</em></sub> of 1.587 V. This work provides scientific insights into interface engineering to enhance the efficiency and long-term stability of CsPbBr<sub>3</sub>-based PSCs, thereby promoting the advancement of perovskite-based optoelectronic technologies.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238513"},"PeriodicalIF":7.9,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218674","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

Ultra high-rate performance LiFePO4 cathode material for next generation fast charging Li-ion batteries 新一代快速充电锂离子电池的超高倍率性能LiFePO4正极材料

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-02 DOI: 10.1016/j.jpowsour.2025.238537

Ch Gowthami , A. Venu Vinod , Manorama Pandey , Hemant Kumar , R. Vijay , S. Anandan

{"title":"Ultra high-rate performance LiFePO4 cathode material for next generation fast charging Li-ion batteries","authors":"Ch Gowthami , A. Venu Vinod , Manorama Pandey , Hemant Kumar , R. Vijay , S. Anandan","doi":"10.1016/j.jpowsour.2025.238537","DOIUrl":"10.1016/j.jpowsour.2025.238537","url":null,"abstract":"<div><div>High-power cathode materials are essential for designing high-rate Li-ion batteries (LIBs), as the demand for fast charging and accelerated operation drive their growing use in applications such as electric vehicles, drones, and industrial power tools. This work investigates a high rate performing LiFePO<sub>4</sub> (LFP) cathode material developed through a synergistic approach combining magnesium (Mg<sup>2+</sup>) ion doping, carbon coating, and the formation of micron-sized particles. Structural and morphological analyses confirm the formation of phase-pure Mg<sup>2+</sup> doped LFP with particle size of 0.2 μm. Rietveld analysis reveals shortened P-O, Fe-O bonds, along with widened Li-O bonds upon Mg<sup>2+</sup> doping in LiFePO<sub>4</sub>. The extended Li-O bonds are expected to significantly enhance the Li-ion kinetics even at higher current rates. These findings are further supported by density functional theory (DFT) calculations, which confirm the reduced diffusion barrier with Mg<sup>2+</sup> doping. Electrochemical studies show that Mg<sup>2+</sup> doped LiFePO<sub>4</sub> delivers high-rate capability of 105 mAh/g at 20C, compared to 75 mAh/g for pristine LiFePO<sub>4</sub>, along with more than 85 % capacity retention after 800 cycles at the same rate. The enhanced high-rate performance is attributed to smaller particle size, uniform carbon coating, and widened Li-ion diffusion channels induced by Mg<sup>2+</sup> doping in the LiFePO<sub>4</sub> crystal structure.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238537"},"PeriodicalIF":7.9,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218518","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

Solution-processable ionic covalent organic framework nanosheets for robust mixed matrix membranes with enhanced proton conductivity 溶液可加工离子共价有机框架纳米片用于增强质子导电性的坚固混合基质膜

IF 7.9 2区工程技术

Journal of Power Sources Pub Date : 2025-10-02 DOI: 10.1016/j.jpowsour.2025.238508

Hao Li , Chunyang Fan , Lei Han , Haipeng Li , Luhao Tang , Yanan Liu , Hong Wu , Zhongyi Jiang

{"title":"Solution-processable ionic covalent organic framework nanosheets for robust mixed matrix membranes with enhanced proton conductivity","authors":"Hao Li , Chunyang Fan , Lei Han , Haipeng Li , Luhao Tang , Yanan Liu , Hong Wu , Zhongyi Jiang","doi":"10.1016/j.jpowsour.2025.238508","DOIUrl":"10.1016/j.jpowsour.2025.238508","url":null,"abstract":"<div><div>Proton exchange membranes (PEMs) with robustness and high proton conductivity remain scarce. Here, solution-processable sulfonated covalent organic framework (COF) nanosheets are used as functional fillers and incorporated into a sulfonated polyethersulfone (SPES) matrix to prepare mixed matrix membranes (MMMs). Remarkably, the mixed casting solution comprising sulfonated COF nanosheets and SPES demonstrates exceptional stability (no sedimentation/agglomeration over 12 months), primarily due to charge-induced electrostatic repulsion. The optimized MMMs, prepared from the above highly stable casting solution, demonstrate uniform filler dispersion and excellent filler-polymer interfacial compatibility, achieving both high mechanical strength (∼36 MPa) and superior proton conductivity (∼453 mS cm<sup>−1</sup>, 70 °C, 95 % RH). The unprecedented performance of MMMs mainly benefits from the excellent solution processability of the functional fillers, which enables a uniformly mixed solution with superior stability, thereby minimizing adverse effects of filler agglomeration during membrane preparation. Leveraging the unique advantages of the stable casting solution, large-area MMMs (528 cm<sup>2</sup>) with comparable performance (∼42 MPa, ∼449 mS cm<sup>−1</sup>, 70 °C, 95 % RH) are readily prepared and tested in fuel cell. The successful preparation of various MMMs validates the generality of this method. This work offers a new roadmap for preparing MMMs, representing a critical step toward their broader application.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":"660 ","pages":"Article 238508"},"PeriodicalIF":7.9,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218585","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}

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