Stabilization of Garnet/Liquid Electrolyte Interface Using Superbase Additives for Hybrid Li Batteries

被引：100

作者：

Xu, Biyi ^{[1
]}

Duan, Huanan ^{[1
]}

Liu, Hezhou ^{[1
]}

Wang, Chang-An ^{[2
]}

Zhong, Shengwen ^{[3
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[3] Jiangxi Univ Sci & Technol, Sch Mat Sci & Engn, Ganzhou 341000, Jiangxi, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 25期

基金：

中国国家自然科学基金;

关键词：

interfacial resistance; lithium garnets; hybrid electrolyte; additives; cyclibility; AIR STABILITY; LITHIUM; CONDUCTIVITY;

D O I：

10.1021/acsami.7b05599

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To improve the solid-electrolyte/electrode interface compatibility, we have proposed the concept of hybrid electrolyte by including a small amount of liquid electrolyte in between. In this work, n-BuLi, a superbase, has been found to significantly improve the cycling performance of LiFePO4/Li hybrid cells containing Li7La3Zr1.5Ta0.5O12 (LLZT) and conventional carbonate-based liquid electrolyte. The modified cells have been cycled for 400 cycles at 100 and 200 uA cm2 at room temperature, indicating excellent solid/liquid electrolyte interface stability. The role of n-BuLi may be 3-fold: to retard the decomposition reaction of LE, to suppress the Li+/H+ exchange, and to lithiate the garnet/LE interface, inhibiting side reactions and enhancing interfacial lithium-ion transport.

引用

页码：21077 / 21082

页数：6

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