维普中文期刊产品整合服务

Revealing the correlation between structure evolution and electrochemical performance of high-voltage lithium cobalt oxide

查看全文 作　　者：Jiajia [1,3]Wan;Jianping [1]Zhu;Yuxuan [1]Xiang;Guiming [2]Zhong;Xiangsi [1]Liu;Yixiao [1]Li;Kelvin [1,3]H.L.Zhang;Chaoyu [1]Hong;Jianming [3]Zheng;Kai [4]Wang;Yong [1,5]Yang 高影响力作者 机构地区：[1]Collaborative Innovation Center of Chemistry for Energy Materials,State Key Laboratory for Physical Chemistry of Solid Surface,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China;[2]Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,Fujian,China;[3]Department of Chemical and Biochemical Engineering,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China;[4]Ningde Amperex Technology Ltd,Ningde 352100,Fujian,China;[5]School of Energy,Xiamen University,Xiamen 361005,Fujian,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2021年第30卷第3期,共9页高影响力期刊 基　　金：funded by the National Natural Science Foundation of China(grant no.21761132030,21935009);National Key Research and Development Program of China(grant no.2016YFB0901502,2018YFB0905400);Collaboration project between Ningde City&Xiamen University(2017c002)。 摘　　要：Lithium cobalt oxide(LCO)is the dominating cathode materials for lithium-ion batteries(LIBs)deployed in consumer electronic devices for its superior volumetric energy density and electrochemical performances.The constantly increasing demands of higher energy density urge to develop high-voltage LCO via a variety of strategies.However,the corresponding modification mechanism,especially the influence of the long-and short-range structural transitions at high-voltage on electrochemical performance,is still not well understood and needs further exploration.Based on ss-NMR,in-situ X-ray diffraction,and electrochemical performance results,it is revealed that the H3 to H1-3 phase transition dictates the structural reversibility and stability of LCO,thereby determining the electrochemical performance.The introduction of La and Al ions could postpone the appearance of H1-3 phase and induce various types of local environments to alleviate the volume variation at the atomic level,leading to better reversibility of the H1-3 phase and smaller lattice strain,and significantly improved cycle performance.Such a comprehensive long-range,local,and electronic structure characterization enables an in-depth understanding of the structural evolution of LCO,providing a guiding principle for developing high-voltage LCO for high energy density LIBs. 关 键 词：Lithium cobalt oxide HIGH-VOLTAGE In-situ XRD Solid-state NMR Structure change
相关文献

参考文献(45)

引证文献(3)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费