Temperature Dependence of Lithium Anode Voiding in Argyrodite Solid-State Batteries

被引：62

作者：

Jolly, Dominic Spencer ^{[1
,2
,3
,4
]}

Ning, Ziyang ^{[1
,2
,3
,4
]}

Hartley, Gareth O. ^{[1
,2
,3
,4
]}

Liu, Boyang ^{[1
,2
,3
,4
]}

Melvin, Dominic L. R. ^{[1
,2
,3
,4
]}

Adamson, Paul ^{[1
,2
,3
,4
]}

Marrow, James ^{[1
]}

Bruce, Peter G. ^{[1
,2
,3
,4
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] Univ Oxford, Dept Chem, Oxford OX1 3PH, England

[3] Faraday Inst, Didcot OX11 0RA, Oxon, England

[4] Henry Royce Inst, Oxford OX1 3PH, England

来源：

ACS APPLIED MATERIALS & INTERFACES | 2021年 / 13卷 / 19期

基金：

英国工程与自然科学研究理事会;

关键词：

solid-state battery; lithium anode; interfaces; temperature dependence; X-ray tomography; HIGH-ENERGY; ELECTROLYTE INTERPHASE; IONIC-CONDUCTIVITY; LI6PS5X X; METAL; CHALLENGES; GROWTH; INTERFACE; PRESSURE; PATHWAYS;

D O I：

10.1021/acsami.1c06706

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Void formation at the Li/ceramic electrolyte interface of an all-solid-state battery on discharge results in high local current densities, dendrites on charge, and cell failure. Here, we show that such voiding is reduced at the Li/Li6PS5Cl interface at elevated temperatures, sufficient to increase the critical current before voiding and cell failure from <0.25 mA cm(-2) at 25 degrees C to 0.25 mA cm(-2) at 60 degrees C and 0.5 mA cm(-2) at 80 degrees C under a relatively low stack-pressure of 1 MPa. Increasing the stack-pressure to 5 MPa and temperature to 80 degrees C permits stable cycling at 2.5 mA cm(-2). It is also shown that the charge-transfer resistance at the Li/Li6PS5Cl interface depends on pressure and temperature, with relatively high pressures required to maintain low charge-transfer resistance at -20 degrees C. These results are consistent with the plastic deformation of Li metal dominating the performance of the Li anode, posing challenges for the implementation of solid-state cells with Li anodes.

引用

页码：22708 / 22716

页数：9