用于全固态锂电池的LiSiPON电解质薄膜的制备及电导性能研究  

Fabrication and electrical conductivity studies of LiSiPON electrolyte films for all-solid-state lithium batteries＊

作　　者：邢光建[1] 李朝阳[2] 于春娜[3] 王怡[3] 武光明[1] 

机构地区：[1]北京石油化工学院材料科学与工程系,北京102617 [2]北京印刷学院等离子体物理与材料实验室,北京102600 [3]北京石油化工学院数理系,北京102617

出　　处：《功能材料》2007年第A04期1434-1438,共5页Journal of Functional Materials

摘　　要：利用磁控溅射方法在N2气氛下制备出了LiSiPON电解质薄膜，研究了薄膜的结构、形貌和组成，着重探讨了薄膜中N含量对薄膜离子电导率的影响。随着N2分压的增加，薄膜中的N含量逐渐增加，0.53Pa时达到最大，超过此分压N含量又逐步下降。随着薄膜中N含量的增加，离子电导率提高，最大达10．4×10^-6S／cm（室温），这对固态电解质薄膜来说是足够了。为了测量电解质薄膜的电化学稳定性，组装了LiCoO2／LiSiPON／SnO2薄膜电池，显示出了良好的循环性能。LiSiPON electrolyte films were prepared by RF magnetron sputtering under pure N2. The structure, morphology and composition of the LiSiPON electrolyte films were studied and the influence of the N content on the ionic conductivity of the films was investigated in detail. The N content of the films increased with the increasing of N2 partial pressure and reached a maximum value at 0.53Pa. For higher N2 partial pressure （ 〉0.53Pa）, N content began to decrease. The ionic conductivity of the LiSiPON films strongly depended on the N content of the films. With the increasing of the N content, the ionic conductivity of the films improved. The ionic conductivity of the film with higher N content measured at room temperature approaches 10.4×10^-6S/cm, which was sufficient for the solid electrolyte films. For measurement of electrochemical stability of the electrolyte films, LiSiPON electrolyte film was incorporated into LiCoO2/SnO2 thin film battery, showing a good cycling performance.

关 键 词：LiSiPON 电解质薄膜 离子电导率 全固态电池 

分 类 号：TM911[电气工程—电力电子与电力传动]