Zixing Wang, Kang Luo, Ying Mo, Jinlong Ke, Wang Zhou, Shi Chen, Peng Gao, Jilei Liu
{"title":"协同双添加剂定制稳健相间体,提高用于 K+ 储存的普鲁士蓝阴极的循环能力","authors":"Zixing Wang, Kang Luo, Ying Mo, Jinlong Ke, Wang Zhou, Shi Chen, Peng Gao, Jilei Liu","doi":"10.1002/adfm.202417243","DOIUrl":null,"url":null,"abstract":"Fe-based Prussian blue analogs (KFeHCF) are considered as the most promising cathode materials for potassium-ion batteries (KIBs) owing to their low cost and high energy density. However, the unstable cathode electrolyte interphase (CEI) typically leads to rapid capacity decay upon long-term cycling, thus limiting its practical application. Herein, for the first time, a dual-additive strategy has been proposed as an effective and economical approach to regulate the interphase chemistry on KFeHCF surface. The optimized contents of potassium selenocyanate (KSeCN, 0.5 wt.%) and lithium difluoro(oxalato)borate (LiDFOB, 0.5 wt.%) synergistically lead to the formation of a robust, homogeneous, and conductive CEI film, which promote charge transfer and K<sup>+</sup> diffusion, inhibit side reactions and Fe dissolution, and realize stabilization of KFeHCF structure upon long cycling. As a result, the K∥KFeHCF battery with 0.5 wt.% LiDFOB + 0.5 wt.% KSeCN addition exhibits significantly improved cycling performance with a high capacity retention ratio of 81.5% after 5000 cycles at 500 mA g<sup>−1</sup> current density and 4.5 V cutoff voltage. This study provides a new paradigm for designing high performance potassium-ion battery via dual electrolyte additive incorporation.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":null,"pages":null},"PeriodicalIF":18.5000,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synergistic Dual-Additive Tailored Robust Interphase toward Enhanced Cyclability of Prussian Blue Cathode for K+ Storage\",\"authors\":\"Zixing Wang, Kang Luo, Ying Mo, Jinlong Ke, Wang Zhou, Shi Chen, Peng Gao, Jilei Liu\",\"doi\":\"10.1002/adfm.202417243\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Fe-based Prussian blue analogs (KFeHCF) are considered as the most promising cathode materials for potassium-ion batteries (KIBs) owing to their low cost and high energy density. However, the unstable cathode electrolyte interphase (CEI) typically leads to rapid capacity decay upon long-term cycling, thus limiting its practical application. Herein, for the first time, a dual-additive strategy has been proposed as an effective and economical approach to regulate the interphase chemistry on KFeHCF surface. The optimized contents of potassium selenocyanate (KSeCN, 0.5 wt.%) and lithium difluoro(oxalato)borate (LiDFOB, 0.5 wt.%) synergistically lead to the formation of a robust, homogeneous, and conductive CEI film, which promote charge transfer and K<sup>+</sup> diffusion, inhibit side reactions and Fe dissolution, and realize stabilization of KFeHCF structure upon long cycling. As a result, the K∥KFeHCF battery with 0.5 wt.% LiDFOB + 0.5 wt.% KSeCN addition exhibits significantly improved cycling performance with a high capacity retention ratio of 81.5% after 5000 cycles at 500 mA g<sup>−1</sup> current density and 4.5 V cutoff voltage. This study provides a new paradigm for designing high performance potassium-ion battery via dual electrolyte additive incorporation.\",\"PeriodicalId\":112,\"journal\":{\"name\":\"Advanced Functional Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":18.5000,\"publicationDate\":\"2024-10-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Functional Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/adfm.202417243\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Functional Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/adfm.202417243","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Synergistic Dual-Additive Tailored Robust Interphase toward Enhanced Cyclability of Prussian Blue Cathode for K+ Storage
Fe-based Prussian blue analogs (KFeHCF) are considered as the most promising cathode materials for potassium-ion batteries (KIBs) owing to their low cost and high energy density. However, the unstable cathode electrolyte interphase (CEI) typically leads to rapid capacity decay upon long-term cycling, thus limiting its practical application. Herein, for the first time, a dual-additive strategy has been proposed as an effective and economical approach to regulate the interphase chemistry on KFeHCF surface. The optimized contents of potassium selenocyanate (KSeCN, 0.5 wt.%) and lithium difluoro(oxalato)borate (LiDFOB, 0.5 wt.%) synergistically lead to the formation of a robust, homogeneous, and conductive CEI film, which promote charge transfer and K+ diffusion, inhibit side reactions and Fe dissolution, and realize stabilization of KFeHCF structure upon long cycling. As a result, the K∥KFeHCF battery with 0.5 wt.% LiDFOB + 0.5 wt.% KSeCN addition exhibits significantly improved cycling performance with a high capacity retention ratio of 81.5% after 5000 cycles at 500 mA g−1 current density and 4.5 V cutoff voltage. This study provides a new paradigm for designing high performance potassium-ion battery via dual electrolyte additive incorporation.
期刊介绍:
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