Title: Heterogeneous current collector in lithium-ion battery for thermal-runaway mitigation

Abstract

Current collector accounts for more than 90% of the electric conductivity and ∼90% of the mechanical strength of the electrode in lithium-ion battery (LIB). Usually, current collectors are smooth metallic thin films. In the current study, we show that if the current collector is heterogeneous, the heat generation becomes negligible when the LIB cell is subjected to mechanical abuse. The phenomenon is attributed to the guided strain concentration, which promotes the separation of the forward and the return paths of internal short circuit. As the internal impedance drastically increases, the stored electric energy cannot be dissipated as thermal energy. The modification of current collector does not affect the cycling performance of the LIB cell. This finding enables advanced thermal-runaway mitigation techniques for high-energy, large-scale energy storage systems.

Authors:

Wang, Meng; Le, Anh V.; Shi, Yang; Noelle, Daniel J.; Qiao, Yu

Publication Date:

Tue Feb 21 00:00:00 EST 2017

Sponsoring Org.:

USDOE Advanced Research Projects Agency - Energy (ARPA-E)

OSTI Identifier:

1349345

Grant/Contract Number:  

AR0000396

Resource Type:

Publisher's Accepted Manuscript

Journal Name:

Applied Physics Letters

Additional Journal Information:

Journal Name: Applied Physics Letters Journal Volume: 110 Journal Issue: 8; Journal ID: ISSN 0003-6951

Publisher:

American Institute of Physics

Country of Publication:

United States

Language:

English