Control of LiFePO4 air-aging through the use of electrolyte additive

Marine Cuisinier, Nicolas Dupré, Dominique Guyomard

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Air-aged LiFePO4 exhibits an OH-rich surface that reacts with LiPF6 based electrolyte, leading to poor battery performance. We show that outstanding electrochemical performance is achieved when using air-aged LiFePO4 in the presence of electrolyte additive N,N-diethylamino trimethylsilane, capable of reacting with acidic impurities. Stable impedance is obtained upon cycling, and 7Li and 19F MAS NMR study indicates that the interphasial chemistry is governed by a surface layer coming from reacted additive.

Original languageEnglish
Pages (from-to)138-141
Number of pages4
JournalElectrochemistry Communications
Volume38
DOIs
Publication statusPublished - 1 Jan 2014

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Keywords

  • Additive
  • Interface
  • LiFePO
  • Lithium battery

ASJC Scopus subject areas

  • Electrochemistry

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