Enhancing the interface stability of Li1.3Al0.3Ti1.7(PO4)3 and lithium metal by amorphous Li1.5Al0.5Ge1.5(PO4)3 modification

被引：0

作者：

Lianchuan Li

Ziqi Zhang

Linshan Luo

Run You

Jinlong Jiao

Wei Huang

Jianyuan Wang

Cheng Li

Xiang Han

Songyan Chen

机构：

[1] Xiamen University,Department of Physics, Jiujiang Research Institute, and Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices

[2] Nanjing Forestry University,College of Materials Science and Engineering

来源：

Ionics | 2020年 / 26卷

关键词：

All-solid-state lithium battery; Li; Al; Ti; (PO; ); Li; Al; Ge; (PO; ); protective layer; Stability against lithium; Radio frequency sputtering;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Li1.3Al0.3Ti1.7(PO4)3 (LATP) has become the focus of research because of its high ionic conductivity, high oxidation voltage, and low air sensitivity. However, Ti4+ is easily reduced by Li metal. In this paper, amorphous Li1.5Al0.5Ge1.5(PO4)3 (a-LAGP) is introduced as an interface modification layer, because LAGP has the small electrochemical potential difference and Ge4+ is more difficult to be reduced by Li. Radio frequency sputtering (RF sputtering) is adopted to modify the a-LAGP thickness less than 100 nm. Compared with crystalline LAGP layer, a-LAGP has a better effect on improving the interface stability of LATP and Li. With the a-LAGP film, the Li/a-LAGP/LATP/a-LAGP/Li symmetrical cell is still stable after 100 cycles with the over potential changing from 1 V to 3 V. The probable mechanism of the good stability between a-LAGP and Li are discussed.

引用

页码：3815 / 3821

页数：6

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