LiTFSI0.6-LiODFB0.4+LiPF6电解液在锂金属电池中的应用  

LiTFSI 0.6-LiODFB0.4+LiPF6 Electrolyte for Lithium Metal Batteries

作　　者：上官雪慧 李法强[1,4] 贾国凤 吴志坚[1,2] 王敏 SHANG GUAN Xue-hui;LI Fa-qiang;JIA Guo-feng;WU Zhi-jian;WANG Min(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,Qinghai 810008,China;Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province;University of Chinese Academy of Sciences,Beijing 100049,China;Qinghai Green Grass New Energy Technology Co.Ltd.,Xining 810001,People’s Republic of China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源化学重点实验室,青海西宁810008 [3]中国科学院大学,北京100049 [4]青海绿草地新能源科技有限公司,青海西宁810008

出　　处：《盐湖研究》2020年第2期44-49,共6页Journal of Salt Lake Research

基　　金：国家自然科学基金(U1507116,U1507114);青海省科技成果转化专项(2016-GX-101);西宁市科技局科技攻关项目(2017-G-05)。

摘　　要：锂金属因为其具有高能量密度,是构建高比能电池的理想负极。然而,锂枝晶的产生和生长阻碍了锂金属电池(锂作为负极)的发展。在本文中,我们使用LiPF 6作为LiTFSI-LiODFB基双盐电解液的添加剂,该电解液能够显著提高锂金属电池在25℃和60℃温度下的循环稳定性和倍率性能。锂金属电池的优异的循环性能归因于添加剂能够在Li金属表面上产生稳定的固体电解质膜。Lithium metals are highly promising anodes because of their high energy densities.However,lithium metal batteries are hampered by dendrite growth and a limited cycle life.In this study,we design a LiPF 6 additive assisted LiTFSI-LiODFB-based dual-salt electrolytes to dramatically improve the cycling stability and rate capability of Li metal batteries at 25℃and 60℃.The excellent cycling performance of Li metal batteries is attributed to the generation of a conductive and robust solid electrolyte interphase on the Li metal surface.

关 键 词：锂金属电池 双(三氟甲基磺酰)亚胺锂 草酸二氟硼酸锂 电解液 添加剂 

分 类 号：TM911.14[电气工程—电力电子与电力传动]