A mechanism for the improved rate capability of cathodes by lithium phosphate surficial films

Ke Sun; Shen J. Dillon

doi:10.1016/j.elecom.2010.12.013

A mechanism for the improved rate capability of cathodes by lithium phosphate surficial films

Research output: Contribution to journal › Article

Abstract

A Fire and quench method has been applied to coat LiCoO₂ with a disordered Li₃PO₄ film. The coated LiCoO₂ powders display a 50% increase in power density relative to uncoated powders. The improvement in rate capability is consistent with other observations of similar effects in the LiFePO₄ system. The results suggest a new mechanism that explains the effects in both systems. The rate capability appears to be limited by ionic diffusion in the electrolyte and the power may derive from the surficial films ability to reduce concentration polarization perpendicular to the particles' surfaces.

Original language	English (US)
Pages (from-to)	200-202
Number of pages	3
Journal	Electrochemistry Communications
Volume	13
Issue number	2
DOIs	https://doi.org/10.1016/j.elecom.2010.12.013
State	Published - Feb 1 2011

Keywords

Electrolyte polarization
High power
LiPO
LiCoO
Surficial film

ASJC Scopus subject areas

Electrochemistry

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10.1016/j.elecom.2010.12.013

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Sun, K., & Dillon, S. J. (2011). A mechanism for the improved rate capability of cathodes by lithium phosphate surficial films. Electrochemistry Communications, 13(2), 200-202. https://doi.org/10.1016/j.elecom.2010.12.013

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