掺杂元素对LLZO的制备及与金属锂界面性能的影响  

The effect of doping on the synthesis of LLZO and its interface resistance with lithium metal

作　　者：刘彦博 陈挺[1] 郑鸿鹏[1] 徐比翼[1] 段华南[1] 刘河洲[1] 王可[2] 吴勇民[2] LIU Yanbo;CHEN Ting;ZHENG Hongpeng;XU Biyi;DUAN Huanan;LIU Hezhou;WANG Ke;WU Yongmin(State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;State Key Laboratory of Space Power Technology, Shanghai Institute of Space Power Sources, Shanghai 200245,China)

机构地区：[1]上海交通大学材料科学与工程学院,金属基复合材料国家重点实验室,上海200240 [2]上海空间电源研究所,空间电源技术国家重点实验室,上海200245

出　　处：《功能材料》2017年第12期12001-12004,12010,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(11304198);上海航天技术研究院-上海交大航天先进技术联合研究中心资助项目(USCAST-2015-40);上海交通大学材料基因组联合研究中心资助项目(15X190030002)

摘　　要：针对固态电解质的界面性能的研究和改进,制备了掺杂不同元素(Ta、Nb、Sb和Te)的含锂石榴石LLZO,对比了它们的传导率和界面电阻,探究了不同温度下的LLZO的离子传导性能及界面性能。发现当掺杂了Ta元素的情况下保持原有的传导率,传导率为5×10^(-4)S/cm,并且能够获得最好界面性能,并且随着温度的升高,对Li的界面电阻在不断下降,是具有应用前景的固态电解质。Solid state lithium ion battery represents an important trend of battery technology.For the researching for the interface’s performance of solid state electrolyte,in this work,LLZO with different dopants(Ta,Nb,Sb and Te)was synthesized and the conductivity and interfacial resistance with lithium metal were compared.The ionic conductivity and interfacial properties under different temperatures were also investigated.The results show that the LLZO doped with Ta maintained the ionic conductivity of5×10-4S/cm and had the best performance in terms of the interfacial resistance.The EIS results showed that the interfacial resistance was decreasing with the increasing temperature,so that the LLZO would be one of the most promising solid state electrolyte.

关 键 词：LLZO 掺杂 界面电阻 交流阻抗 

分 类 号：TM912[电气工程—电力电子与电力传动]