冷等静压法制备Li_7La_3Zr_2O_(12)固体电解质  

Preparing Li_7La_3Zr_2O_(12) solid electrolyte by cold isostatic pressing method

作　　者：赵鹏程[1,2] 祝夏雨 曹高萍[1,2] 文越华[1,2] 

机构地区：[1]防化研究院,北京100191 [2]先进化学蓄电技术与材料北京市重点实验室,北京100191

出　　处：《电池》2017年第3期133-136,共4页Battery Bimonthly

基　　金：国家重点研发计划(2016YFB0901500)

摘　　要：通过冷等静压法制备了Li_7La_3Zr_2O_(12)(LLZO)固体电解质隔膜,采用XRD、SEM、交流阻抗谱、Hebb-Wagner直流恒压法和循环伏安扫描等,对晶体结构、表面形貌及电化学性能进行分析。烧结温度达1 150℃时,得到的样品为纯立方相,表面致密、无明显气孔存在;30℃下的总离子导电率为1.07×10^(-4)S/cm,电子导电率为2.39×10^(-8)S/cm,表现为良好的离子导体、电子绝缘体;电化学稳定窗口宽,0~7 V(vs.Li^+/Li)内无氧化还原反应发生。Cold isostatic pressing method was employed to prepare LiTLa3Zr2012 （LLZO） solid state electrolyte. The crystalline structure, morphology, and electrochemical performance were characterized by XRD, SEM, AC impedance spectrum, Hehb-Wagner and cyclic vohammetry measurements. When the sintering temperature reached up to 1 150 ℃, a dense and pure cubic structure LLZO pellet was gained, with a total ionic conductivity of 1.07 ×10-4 S/cm and an electronic conductivity of 2. 39 ×10-8S/era at room temperature. This sample was determined to be a nice ion conductor and electron insulator. In a wide electrochemical stable widow of 0 -7 V（ vs. Li ＋/Li ）, no distinct redox reaction was detected.

关 键 词：锂离子电池 固体电解质 离子导电率 电子导电率 冷等静压法 

分 类 号：TM912[电气工程—电力电子与电力传动]