锆盐原料不同对LiZr_2(PO_4)_3锂离子固体电解质结构及性能的影响  

Influence of Zirconium Salt Materials on the Structure and Properties of LiZr_2(PO_4)_3 Lithium Ion Solid Electrolyte

作　　者：李文龙[1,2] 刘欢 袁康[1,2] 杨利青 周倩倩 王浩静[1] 张洪[1] Li Wenlong;Liu Huan;Yuan Kang;Yang Liqing;Zhou Qianqian;Wang Haojing;Zhang Hong(State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics of CAS,Xi'an 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《稀有金属材料与工程》2019年第4期1298-1303,共6页Rare Metal Materials and Engineering

基　　金：陕西省科学技术研究发展计划(2016GY170)

摘　　要：以不同的锆盐为原料,采用固相法及液相法制备LiZr_2(PO_4)_3锂离子固体电解质,通过无压烧结的方式制备得到固体电解质片,并通过X射线衍射(XRD),扫描电子显微镜(SEM),电化学交流阻抗(EIS)对LiZr_2(PO_4)_3锂离子固态电解质进行表征,通过测试结果对比分析,研究锆盐原料的不同对LiZr_2(PO_4)_3锂离子固态电解质结构及性能的影响。结果表明:当以醋酸锆为锆盐原料时,合成的LiZr_2(PO_4)_3以高电导率的菱方相于室温下稳定存在,而其他3种锆盐作原料时合成的LiZr_2(PO_4)_3室温下以三斜相存在。制备的菱方相LiZr_2(PO_4)_3电解质样品片室温锂离子总电导率最大,为2.25×10^(-5) S/cm,且激活能值最小,为0.28 eV。Samples of LiZr2(PO4)3 compound with pure phase, adopting the method of solid phase and liquid phase method, were obtained by pressureless sintering from different zirconium salt raw materials. And LiZr2(PO4)3 Li-ion solid electrolytes were characterized through X-ray diffraction(XRD), scanning electron microscope(SEM) and electrochemical impedance(EIS). Analyzing the results of the test, the influence of different zirconium salt raw materials on the structure and performance of LiZr2(PO4)3 solid electrolytes was studied. The results show that the room-temperature stable α-LiZr2(PO4)3(rhombohedral phase) was prepared from zirconium acetate. While synthetic LiZr2(PO4)3 prepared from the other three kinds of zirconium salt raw materials exists in triclinic phase. Rhombohedral phase LiZr2(PO4)3 lithium ion solid state electrolyte sample prepared from different zirconium raw materials shows the highest total conductivity of 2.25×10-5 S/cm, and the lowest activation energy of 0.28 eV.

关 键 词：LiZr2(PO4)3 锂离子固体电解质 离子电导率 锂离子二次电池 

分 类 号：TM911[电气工程—电力电子与电力传动]