Effect of Temperature on Li Electrodeposition Behavior in Room-Temperature Ionic Liquids Comprising Quaternary Ammonium Cation

Secondary batteries with Li metal anodes have attracted considerable research attention as power sources for electric vehicles. However, the widespread application of these batteries is hindered by short circuiting due to Li dendrite formation, which highlights the need for a more detailed mechanist...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the Electrochemical Society 2019, Vol.166 (13), p.A2973-A2979
Main Authors: Sano, Hikaru, Kitta, Mitsunori, Shikano, Masahiro, Matsumoto, Hajime
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Secondary batteries with Li metal anodes have attracted considerable research attention as power sources for electric vehicles. However, the widespread application of these batteries is hindered by short circuiting due to Li dendrite formation, which highlights the need for a more detailed mechanistic understanding of this process. Typical Li-metal-based secondary batteries contain organic solvents, which are unstable under harsh cathodic conditions (i.e., at the Li redox potential), and therefore, decompose to form surface films. Conversely, room-temperature ionic liquids comprising quaternary ammonium cations (QA-RTILs) are very stable under these conditions and are thus considered promising alternatives to the commonly used carbonate solvents, as has been demonstrated in our previous studies. Herein, we investigate the effect of temperature on Li electrodeposition behavior in a selected QA-RTIL, revealing that this behavior is mainly determined based on the deposition overpotential and the Li diffusion coefficient.
ISSN:0013-4651
1945-7111
DOI:10.1149/2.1051913jes