ACS Energy Letters 最新文献

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Subzero Temperature Operation of Aqueous Zn Metal Batteries by Tailoring Electrolyte Solvation Structure 电解液溶剂化结构对锌金属水电池低温运行的影响
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-08 DOI: 10.1021/acsenergylett.5c00548
Qiao Ni, Lumin Zheng, Orapa Tamwattana, Jaekyun Yoo, Songyan Bai, Myeong Hwan Lee, Joo Hyeon Noh, Chuan Wu, Kisuk Kang
{"title":"Subzero Temperature Operation of Aqueous Zn Metal Batteries by Tailoring Electrolyte Solvation Structure","authors":"Qiao Ni, Lumin Zheng, Orapa Tamwattana, Jaekyun Yoo, Songyan Bai, Myeong Hwan Lee, Joo Hyeon Noh, Chuan Wu, Kisuk Kang","doi":"10.1021/acsenergylett.5c00548","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00548","url":null,"abstract":"The declining performance of aqueous zinc metal batteries (AZMBs) at colder temperatures, especially due to aqueous electrolyte solidification and reduced capacity retention at subzero temperatures, poses a considerable challenge. Here, we report a cheap and ecofriendly aqueous electrolyte formulation comprising low-concentration zinc chloride salt and a common antifreeze agent. We show that the glycerin antifreeze co-solvent effectively interacts with free water molecules and weakens the zinc-ion primary solvation structures, thereby considerably mitigating their detrimental effect at low temperatures. Consequently, the optimized electrolyte successfully outputs a depressed liquid–glass transition point down to −99.2 °C and a record-high Zn plating/stripping Coulombic efficiency of ∼99.94% at −40 °C, as well as ∼70% of its room-temperature capacity at −40 °C, opening up a new opportunity for practical AZMBs.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"71 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143926822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Regulating the Oxygen Evolution Mechanism through In Situ Reconstruction of Ru-Modified Manganese Oxybromide ru修饰的氧化溴化锰原位重构调控析氧机理
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-07 DOI: 10.1021/acsenergylett.5c00957
Ci Lin, Tsung-Yi Chen, Tao Zhou, Yingqiang Wu, Ching Kit Tommy Wun, Weicheng Chen, Han-Yi Chen, Vincent Tung, Zhengxiao Guo, Tsz Woon Benedict Lo, Liang Cai, Yida Deng, Philip C. Y. Chow
{"title":"Regulating the Oxygen Evolution Mechanism through In Situ Reconstruction of Ru-Modified Manganese Oxybromide","authors":"Ci Lin, Tsung-Yi Chen, Tao Zhou, Yingqiang Wu, Ching Kit Tommy Wun, Weicheng Chen, Han-Yi Chen, Vincent Tung, Zhengxiao Guo, Tsz Woon Benedict Lo, Liang Cai, Yida Deng, Philip C. Y. Chow","doi":"10.1021/acsenergylett.5c00957","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00957","url":null,"abstract":"Regulating the oxygen evolution reaction (OER) mechanism presents a promising yet challenging approach to address the performance-stability trade-off of acidic water oxidation catalysts. Here we demonstrate the regulation of the OER mechanism through in situ surface reconstruction of manganese oxybromides (MOB) catalysts modified with single-atom ruthenium (Ru-MOB). In situ Raman spectroscopy reveals that Ru incorporation intensifies the inherent, reversible surface reconstruction of MOB, resulting in the formation of a γ-MnO<sub>2</sub> layer with an onset potential approximately 100 mV lower. Various operando/in situ characterizations and theoretical calculations show that the reconstructed Ru-MOB significantly suppresses the lattice oxygen mechanism while simultaneously enhancing the adsorbate evolution mechanism. In an electrochemical cell, the reconstructed Ru-MOB drives acidic OER with an overpotential about 90 mV lower at 10 mA cm<sup>–2</sup> compared to pure MOB, and it shows negligible performance degradation for over 1400 h. Our work offers a design strategy for the future development of acidic OER catalysts.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"19 1","pages":"2641-2649"},"PeriodicalIF":22.0,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143920562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modulating Solvation Structure in Concentrated Aqueous Organic Redox Flow Battery Electrolyte for Solubility and Transport Enhancement via Polycomplex Ion 通过多络合物离子调节浓水有机氧化还原液电解液的溶剂化结构以增强其溶解度和输运
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-06 DOI: 10.1021/acsenergylett.5c00468
Hyung-Seok Lim, J. David Bazak, Soowhan Kim, Samantha I. Johnson, Ruozhu Feng, Aaron Hollas, Wilma Rishko, Kevin R. Fiedler, Jaehun Chun, Yangang Liang, Xin Zhang, Vijayakumar Murugesan, Wei Wang
{"title":"Modulating Solvation Structure in Concentrated Aqueous Organic Redox Flow Battery Electrolyte for Solubility and Transport Enhancement via Polycomplex Ion","authors":"Hyung-Seok Lim, J. David Bazak, Soowhan Kim, Samantha I. Johnson, Ruozhu Feng, Aaron Hollas, Wilma Rishko, Kevin R. Fiedler, Jaehun Chun, Yangang Liang, Xin Zhang, Vijayakumar Murugesan, Wei Wang","doi":"10.1021/acsenergylett.5c00468","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00468","url":null,"abstract":"Aqueous organic redox flow batteries hold great promise as a technology for creating economical grid energy storage using sustainable materials. Nonetheless, the solubility limit presents a universal barrier for all redox-active organic molecules. In this paper, a new approach is proposed to surpass the solubility limit by manipulating the solvation structure with polycomplex ion additives (PIA). Using poly(3,4-ethylenedioxythiophene) polystyrenesulfonate colloids as one example, its role in dismantling the rigid supramolecular clusters within the highly concentrated 7,8-dihydroxyphenazine-2-sulfonic acid electrolyte is investigated. <sup>1</sup>H and <sup>23</sup>Na NMR spectra and molecular dynamics simulation studies demonstrate that the bipolar structure of the PIA effectively disrupts the aggregations of DHPS and Na<sup>+</sup> ion in the highly concentrated anolyte, thus rendering a more flexible solvation structure and less restrictive ion transport, leading to substantially improved battery performance of an AORFB cell. The anolyte with PIA achieved 1.6 M and 74.3 Ah L<sup>–1</sup> anolyte energy capacity.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"137 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast Charging and Low Temperature Capabilities of Sodium Solid-State Batteries Enabled by Thin NASICON Bilayer Architecture 薄NASICON双层结构实现钠固态电池的快速充电和低温性能
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-05 DOI: 10.1021/acsenergylett.5c00575
Prem Wicram Jaschin, Christopher R. Tang, Eric D. Wachsman
{"title":"Fast Charging and Low Temperature Capabilities of Sodium Solid-State Batteries Enabled by Thin NASICON Bilayer Architecture","authors":"Prem Wicram Jaschin, Christopher R. Tang, Eric D. Wachsman","doi":"10.1021/acsenergylett.5c00575","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00575","url":null,"abstract":"Although sodium solid-state batteries have gained tremendous interest in recent years, achieving stable capacities at high current rates has been a major obstacle in realizing them. Here we report the synthesis of flat and thin (37 μm and down to 18 μm) dense Zn,Mg-dual doped NASICON electrolyte separator layers in a 3D porous–dense bilayer architecture. The anode was formed by filling the porous layer with sodium metal, attaining seamless contact. Full cells with sodium vanadium phosphate cathodes (with a high areal capacity of 1.8 mAh/cm<sup>2</sup>) and sodium-infiltrated NASICON-bilayers were cycled at record-high room temperature (22 °C) current densities of 10.8 mA/cm<sup>2</sup> (6 C), and long-term cycling at 1.7 mA/cm<sup>2</sup> (1 C) was demonstrated. Moreover, low-temperature (−10 °C) cycling capability was demonstrated at a 0.1 C rate. This electrolyte architecture promises high energy density (up to 286 Wh/kg), room-temperature sodium solid-state batteries without the need for stack pressure further improving commercial viability at the pack level.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"53 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Role of Chlorine Content in H2O Adsorption and Reactions on Argyrodite Sulfide Electrolytes 氯含量对硫化银柱石电解质对水的吸附及反应的影响
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-05 DOI: 10.1021/acsenergylett.5c00508
Guoyao Li, Hongpeng Zheng, Yu Yang, Danhui Zhao, Yeqing Shen, Junduo Chen, Shaoping Wu, Hong Zhu, Yong Yang, Hezhou Liu, Huanan Duan
{"title":"The Role of Chlorine Content in H2O Adsorption and Reactions on Argyrodite Sulfide Electrolytes","authors":"Guoyao Li, Hongpeng Zheng, Yu Yang, Danhui Zhao, Yeqing Shen, Junduo Chen, Shaoping Wu, Hong Zhu, Yong Yang, Hezhou Liu, Huanan Duan","doi":"10.1021/acsenergylett.5c00508","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00508","url":null,"abstract":"Sulfide electrolytes are considered to be key materials for high-performance all-solid-state batteries. Chlorine-rich lithium argyrodite sulfides, Li<sub>7–<i>x</i></sub>PS<sub>6–<i>x</i></sub>Cl<sub><i>x</i></sub> (LPSC) in particular, are receiving increasing attention. However, the instability of sulfides with H<sub>2</sub>O remains a major issue, and the influence of the chlorine content on moisture stability is not well understood. This study investigates LPSC electrolytes with varying chlorine contents to explore their interaction mechanisms with H<sub>2</sub>O, focusing on often-overlooked H<sub>2</sub>O adsorption. A series of techniques, including adsorption energy calculations, dynamic vapor sorption, in situ Raman spectroscopy, and solid-state nuclear magnetic resonance, were employed. The degradation product LiCl accelerates H<sub>2</sub>O adsorption when the atmospheric vapor pressure exceeds that of saturated LiCl aqueous solution. Under low humidity, LiCl promotes the conversion of thio-phosphates, enhancing their reactivity with H<sub>2</sub>O. This work provides valuable insights into the interactions between LPSC electrolytes and H<sub>2</sub>O, establishing a foundational framework for studying the moisture stability of sulfides.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"29 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dual Electrolyte Additives Suppress Hydrogen Evolution in Aqueous Li-Ion Batteries 双电解质添加剂抑制水溶液锂离子电池析氢
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-05 DOI: 10.1021/acsenergylett.5c00800
Junsik Kang, Sukhyung Lee, Hochun Lee
{"title":"Dual Electrolyte Additives Suppress Hydrogen Evolution in Aqueous Li-Ion Batteries","authors":"Junsik Kang, Sukhyung Lee, Hochun Lee","doi":"10.1021/acsenergylett.5c00800","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00800","url":null,"abstract":"Aqueous Li-ion batteries suffer from parasitic hydrogen evolution due to limited cathodic stability. We introduce in this work a dual-additive strategy combining a persulfate and a fluorinated acrylate in a 21 mol kg<sup>–1</sup> LiTFSI aqueous electrolyte. The additives promote the formation of a bilayer solid electrolyte interphase (SEI) comprising an inorganic LiF-rich inner layer and a hydrophobic organic-rich outer layer, which effectively suppresses hydrogen evolution and inhibits SEI dissolution. With this formulation, a LiMn<sub>2</sub>O<sub>4</sub>/Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> cell is shown to retain over 80% of its initial capacity after 300 cycles, outperforming both the baseline and single-additive controls. The persulfate–acrylate pair likewise improves the cycling stability in other aqueous electrolytes. We also extended the concept to alternative initiator–monomer combinations, demonstrating its versatility in interfacial engineering. By enabling robust SEI formation, this strategy addresses a key limitation of aqueous Li-ion batteries and supports their practical deployment.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"53 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The State of Reliable Characterization and Testing of Solid-State Batteries 固态电池可靠特性与测试的现状
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-05 DOI: 10.1021/acsenergylett.5c00923
Daren Wu, Elif Pınar Alsaç, Ana Claus, Zhengwu Fang, Manoj K. Jangid, Kiwoong Lee, Douglas Lars Nelson, Se Hwan Park, Sipei Zhang, Miaofang Chi, Neil P. Dasgupta, Matthew T. McDowell, Nicola H. Perry, Jeff Sakamoto, Kelsey B. Hatzell
{"title":"The State of Reliable Characterization and Testing of Solid-State Batteries","authors":"Daren Wu, Elif Pınar Alsaç, Ana Claus, Zhengwu Fang, Manoj K. Jangid, Kiwoong Lee, Douglas Lars Nelson, Se Hwan Park, Sipei Zhang, Miaofang Chi, Neil P. Dasgupta, Matthew T. McDowell, Nicola H. Perry, Jeff Sakamoto, Kelsey B. Hatzell","doi":"10.1021/acsenergylett.5c00923","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00923","url":null,"abstract":"Solid-state batteries unlock possibilities for using energy-dense anodes such as lithium metal while addressing key degradation challenges. However, unresolved issues at the material and cell levels have hindered their commercialization, including variability in mechanical control and testing methodologies, a limited understanding of material behavior under operating conditions, and performance and design gaps between cells for benchtop testing and cells for advanced characterization. This perspective highlights the current state-of-the-art in testing and characterizing solid-state batteries, focusing on mechanical monitoring and controls, benchtop diagnosis and characterization techniques, and advanced <i>operando</i> synchrotron imaging. We emphasize the need for uniform experimental standards, scalable and practical battery cell designs to match commercial operating conditions, and integrated approaches to design advanced <i>in situ</i> and <i>operando</i> experiments to reflect realistic battery operating conditions.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"226 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Nonfluorinated Diluent in Ether-Based Electrolyte for Low-Temperature Sodium-Ion Batteries 低温钠离子电池用醚基电解液中的无氟稀释剂
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-04 DOI: 10.1021/acsenergylett.5c01212
Yuxin Zhou, Weilong Kong, Heng Zhang, Yejuan Xue, Zhimei Huang, Hongfa Xiang
{"title":"A Nonfluorinated Diluent in Ether-Based Electrolyte for Low-Temperature Sodium-Ion Batteries","authors":"Yuxin Zhou, Weilong Kong, Heng Zhang, Yejuan Xue, Zhimei Huang, Hongfa Xiang","doi":"10.1021/acsenergylett.5c01212","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c01212","url":null,"abstract":"Linear ethers with multidentate chelate sites to Na<sup>+</sup> usually have strong solvating power and poor film-forming ability at interfaces that increase the desolvation energy barrier in sodium-ion batteries (SIBs). Herein, we introduce a nonfluorinated and cost-effective diluent of cyclopentyl methyl ether (CPME) in 1,2-diethoxyethene electrolyte to enhance the percentage of anion-participating solvation structure, thus decreasing the desolvation energy and accelerating the ion transfer across the interfaces under cryogenic temperatures. The tame electrolyte exhibits a high reversibility in the Na deposition/stripping process with an average Coulombic efficiency of 99.95% for 1000 cycles. The Na||Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cell retained 99% capacity retention after 180 cycles at −40 °C. Moreover, the hard carbon||Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> cell retained 92.7% capacity retention for 260 cycles under −20 °C, and the initial capacity at −50 °C is 53% of that at 30 °C. Therefore, such a cost-effective diluent shows great potential in promoting the widespread implementation of low-cost and low-temperature SIBs.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"23 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
HyPe 2024: International Conference on Metal Halide Perovskites HyPe 2024:金属卤化物钙钛矿国际会议
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-02 DOI: 10.1021/acsenergylett.5c01173
Lakshminarayana Polavarapu, Narayan Pradhan
{"title":"HyPe 2024: International Conference on Metal Halide Perovskites","authors":"Lakshminarayana Polavarapu, Narayan Pradhan","doi":"10.1021/acsenergylett.5c01173","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c01173","url":null,"abstract":"Figure 1. Group photo of participants at HyPe-2024. HyPe Organizers acknowledge funding from NISER, Bhubaneswar, Department of Atomic Energy, Government of India, through the projects: RIN 4001 and RIN 4002, ANRF through project SSY/2024/001296, IACS, Kolkata, and CSIR-IMMT, Bhubaneswar. The organizers also acknowledge generous funding support from Industrial Sponsors: Bruker India Pvt Ltd, MBraun India, Trokut Solutions, Atos India, Jacomex, Blue Ocean, Inkarp Instruments Pvt Ltd., Simco Global Technology and Systems Ltd and Scientifco City. This article references 41 other publications. This article has not yet been cited by other publications.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"96 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Operational Stability Factor: A Comprehensive Metric for Assessing Catalyst Durability in Dynamic Water Electrolyzer Conditions 运行稳定系数:在动态水电解槽条件下评估催化剂耐久性的综合度量
IF 22 1区 材料科学
ACS Energy Letters Pub Date : 2025-05-02 DOI: 10.1021/acsenergylett.5c00406
Jinyeop Kim, Jongsu Noh, Dong Young Chung
{"title":"Operational Stability Factor: A Comprehensive Metric for Assessing Catalyst Durability in Dynamic Water Electrolyzer Conditions","authors":"Jinyeop Kim, Jongsu Noh, Dong Young Chung","doi":"10.1021/acsenergylett.5c00406","DOIUrl":"https://doi.org/10.1021/acsenergylett.5c00406","url":null,"abstract":"The durability of water electrolyzer catalysts is a critical challenge for sustainable hydrogen production, particularly under dynamic operating conditions from renewable energy fluctuations. Conventional stability analyses fail to account for degradation mechanisms outside the oxygen evolution reaction (OER) range, particularly at low potentials during system downtime. In here, we reveal that degradation arises not only from OER activity but also from redox transitions of the support material at low potentials using iridium-supported manganese oxide (Ir-MnO<sub>2</sub>) and IrOx as a model system. To address this gap, we propose the Operational Stability Factor (OSF), a metric that evaluates catalyst stability under dynamic (intermittent) operation scenarios. OSF provides critical insights into catalyst behavior during load fluctuations. Furthermore, OSF enables a quantitative assessment of catalyst lifespan, contributing to the feasibility of green hydrogen production. By integrating OSF into catalyst development and operational strategies, this study offers a transformative approach to designing more durable electrocatalysts and optimizing their operating conditions.","PeriodicalId":16,"journal":{"name":"ACS Energy Letters ","volume":"109 1","pages":""},"PeriodicalIF":22.0,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143901743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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