石榴石结构Li_(7)La_(3)Zr_(2)O_(12)固态电解质掺杂改性研究进展  

Research Progress in Doping Modification of Garnet Structured Li_(7)La_(3)Zr_(2)O_(12) Solid Electrolyte

作　　者：肖艺扬 杨娟玉 王宁[1,3,4] 张小宝[1,3,4] 赵桓[1,2,3,4] 杜磊 黄小卫 Xiao Yiyangg;Yang Juanyu;Wang Ning;Zhang Xiaobao;Zhao Huan;Du Lei;Huang Xiaowei(National Engineering Research Center for Rare Earth,Grirem Advanced Materials Co.,Ltd.,Beijing 100088,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Bejing 100038;General Research Institute for Nonferrous Metals,Beijing 100088,China;Rare Earth Functional Materials(Xiong'an)Innovation Center Co.,Ltd.,Xiong'an 071700,China)

机构地区：[1]稀土国家工程研究中心,有研稀土新材料股份有限公司,北京100088 [2]北京科技大学冶金与生态工程学院,北京100083 [3]北京有色金属研究总院,北京100088 [4]雄安稀土功能材料创新中心有限公司,河北雄安071700

出　　处：《中国稀土学报》2023年第3期520-540,I0003,共22页Journal of the Chinese Society of Rare Earths

基　　金：雄安新区科技创新专项(2022XAGG0110);河北省自然科学基金项目(E2022103012)资助。

摘　　要：锂离子电池是目前发展最快的化学储能电源,使用固态电解质的固态锂离子电池相比传统液态电解质锂离子电池能量密度更高,安全性更好,是下一代锂离子电池的发展方向。石榴石结构Li_(7)La_(3)Zr_(2)O_(12)(LLZO)固态电解质凭借较高的离子电导率、宽的电化学窗口及优异的稳定性,成为了最具商业前途的固态电解质之一。本文从石榴石结构LLZO电解质的发展脉络出发,剖析了石榴石结构LLZO电解质的结构特性、离子传导机制及其具有的高的结构稳定性和离子传导能力的本源,在此基础上综述了石榴石LLZO电解质的单元、双元、多元体相掺杂改性以提升电解质本征离子电导率,第二相掺杂改性以提升电解质的抗锂细丝生长能力、陶瓷致密度等性能,最后对石榴石结构LLZO电解质材料掺杂改性方向进行了分析和展望,为推动全固态锂离子电池电解质的发展提供参考。Lithium ion battery is the fastest developing chemical energy storage power supply at present. Compared with traditional liquid electrolyte lithium ion battery, solid lithium ion battery with solid electrolyte has higher energy density and better safety, which is the development direction of next generation lithium ion battery. Garnet structured Li_(7)La_(3)Zr_(2)O_(12)(LLZO) solid electrolyte has become one of the most promising solid electrolytes due to its high ionic conductivity, wide electrochemical window and excellent stability. This review starts from the development of lithium ion solid electrolytes, analyzes the structural characteristics, conductive mechanism and the root cause of its excellent performance of garnet structured LLZO electrolytes, further describes the bulk phase doping modification, second phase doping modification and other contents of LLZO electrolytes.The types, mechanisms and effects of doping modification are sorted out and summarized. Finally, the material design and preparation of doping modification of solid LLZO electrolyte in the future are analyzed and prospected, which provides a reference for promoting the research and development of high-performance solid-state lithium ion batteries.

关 键 词：锂电池 固态电解质 LLZO 掺杂改性 离子电导率 研究进展 

分 类 号：TM912[电气工程—电力电子与电力传动]