Issue 25, 2015

Li-ion battery shut-off at high temperature caused by polymer phase separation in responsive electrolytes

Abstract

For the purpose of realizing inherently safe high-power Li-ion batteries, a model Li4Ti5O12/LiFePO4 rechargeable battery is investigated using the thermally responsive polymer, poly(benzyl methacrylate), in an ionic liquid. At high temperature, battery operation is inhibited as a result of increased internal resistance caused by polymer and ionic liquid phase separation. Li-ion concentration is shown to affect the phase transition temperature and the extent to which batteries are deactivated.

Graphical abstract: Li-ion battery shut-off at high temperature caused by polymer phase separation in responsive electrolytes

Supplementary files

Article information

Article type
Communication
Submitted
24 Dec 2014
Accepted
23 Feb 2015
First published
23 Feb 2015

Chem. Commun., 2015,51, 5448-5451

Li-ion battery shut-off at high temperature caused by polymer phase separation in responsive electrolytes

J. C. Kelly, N. L. Degrood and M. E. Roberts, Chem. Commun., 2015, 51, 5448 DOI: 10.1039/C4CC10282G

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