Ultrasonic Scanning to Observe Wetting and "Unwetting" in Li-Ion Pouch Cells

被引：279

作者：

Deng, Zhe ^{[1
,3
]}

Huang, Zhenyu ^{[3
]}

Shen, Yue ^{[1
,3
]}

Huang, Yunhui ^{[1
,3
]}

Ding, Han ^{[3
,4
]}

Luscombe, Aidan ^{[2
]}

Johnson, Michel ^{[2
]}

Harlow, Jessie E. ^{[2
]}

Gauthier, Roby ^{[2
]}

Dahn, Jeff R. ^{[2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China

[2] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada

[3] HUST Wuxi Res Inst, Wuxi 214000, Jiangsu, Peoples R China

[4] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Hubei, Peoples R China

来源：

JOULE | 2020年 / 4卷 / 09期

基金：

加拿大自然科学与工程研究理事会; 国家重点研发计划; 中国国家自然科学基金;

关键词：

STATE; TRANSMISSION; CARBONATE; CHARGE;

D O I：

10.1016/j.joule.2020.07.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An ultrasonic imaging technique has been developed to investigate the internal changes of pouch cells nondestructively. The local ultrasonic transmittance of pouch cells has been measured and used for imaging with a new ultrasonic scanning machine designed and built in-house. The wetting process of the cells is clearly observed via such ultrasonic imaging techniques. Furthermore, ultrasonic transmission images of fresh cells and aged cells with different electrolytes and cycling conditions exhibit very different ultrasonic transmittance, which can be caused by electrolyte dry-out or "unwetting'' due to cell swelling. The ultrasonic imaging technique is a very sensitive method to probe failure mechanisms in Li-ion pouch cells.

引用

页码：2017 / 2029

页数：13

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