Ultrasound-Induced Impedance Reduction in Lithium Ion Batteries

被引:2
作者
Im, Ganghyeok [1 ]
Barnes, Derek [1 ]
Lu, Wei [1 ,2 ]
Popa, Bogdan-Ioan [1 ]
Epureanu, Bogdan I. [1 ]
机构
[1] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA
关键词
DYNAMICS; STATE; LI; ELECTROLYTES; NEIGHBORHOOD; PERFORMANCE; COLLAPSE;
D O I
10.1149/1945-7111/ad01e2
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
We report a discovery that the internal impedance of pouch-type lithium ion batteries with polymer electrolytes can be significantly reduced by ultrasound waves applied at constant temperature. By precluding any temperature effect from ultrasound heating, the observation reveals an innovative mechanism to dynamically improve battery performance in operando. The reduction is 16.9% at room temperature, highlighting the great potential for extending lifespan and enhancing energy efficiency. The reduced impedance also increases the usable capacity by 16.3% at room temperature and 53.4% at low temperature, enabling accelerated charging without overheating. The increased effectiveness of ultrasound at low temperatures improves the performance of batteries that degrade under such conditions. This impedance reduction is reversible and can be tuned by the ultrasound power. A potential mechanism is proposed to understand the process, which is supported by molecular dynamics simulations. (c) 2023 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
引用
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页数:8
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