Propylene carbonate (PC)-based electrolytes with high coulombic efficiency for lithium-ion batteries

Hui Zhao, Sang Jae Park, Feifei Shi, Yanbo Fu, Vincent Battaglia, Philip N. Ross, Gao Liu

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

A homologous series of propylene carbonate (PC) analog solvents with increasing length of linear alkyl substitutes were synthesized and used as co-solvents with PC for graphite-based lithium-ion half cells. A graphite anode reaches a capacity of around 310 mAh/g in PC and its analog co-solvents, with 99.95 percent Coulombic efficiency, similar to the values obtained with ethylene carbonate-based electrolytes. Solvent interaction with the graphite anode and subsequent decomposition determines the graphite anode performance. Gaseous products from cyclic carbonates with short alkyl chains cause exfoliation of the graphite anode; solvents with longer alkyl chains are able to prevent graphite exfoliation when used as co-solvents with PC. The PC co-solvents compete for solvation of the Li ion with the PC solvent, delaying PC co-intercalation. Reduction products of PC on a graphite surface via a single-electron path form a stable Solid Electrolyte Interphase (SEI), which allows the reversible cycling of graphite.

Original languageEnglish (US)
Pages (from-to)A194-A200
JournalJournal of the Electrochemical Society
Volume161
Issue number1
DOIs
StatePublished - 2014

All Science Journal Classification (ASJC) codes

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

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