Overcharge performance of 3,7-bis(trifluoromethyl)-nethylphenothiazine at high concentration in lithium-ion batteries

Aman Preet Kaur, Corrine F. Elliott, Selin Ergun, Susan A. Odom

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Extensive overcharge protection via redox shuttling in lithium-ion batteries has been limited by the solubility of stable electrolyte additives. Only a few stable compounds dissolve at concentrations above 0.1 M in carbonate-based electrolytes. Here we report the performance of the highly soluble redox shuttle 3,7-bis(trifluoromethyl)-N-ethylphenothiazine at concentrations as high as 1.0 M. The compound enables overcharge protection for hundreds of hours at rates as high as 1C, and even at 1.0M, normal battery function is not affected by the presence of the redox shuttle at low charging rates. The results on these performance metrics constitute the best yet observed for LiFePO4 cathodes.

Original languageEnglish
Pages (from-to)A1-A7
JournalJournal of the Electrochemical Society
Volume163
Issue number2
DOIs
StatePublished - 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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