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Novel alkyl methyl carbonate solvents for lithium-ion batteries

Authors
Journal
Journal of Power Sources
0378-7753
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0378-7753(03)00151-4
Keywords
  • Lithium-Ion Batteries
  • Electrolytes
  • Butyl Methyl Carbonate
  • Graphite Electrode
  • Organic Carbonates
Disciplines
  • Chemistry

Abstract

Abstract Electrochemical cycling tests on cells with graphite electrodes and several alkyl methyl carbonates were performed. Experiments with single solvent electrolytes and binary mixtures with ethylene carbonate (EC) showed that the alkyl methyl carbonates H 3CO(CO)O(CH 2) n H ( n=3–5) are suitable as co-solvents in lithium-ion batteries. Butyl methyl carbonate (BMC) showed the best performance in these experiments. Ternary mixtures of EC, BMC, and propylene carbonate (PC) allow cycling of cells with a graphite anode material that is otherwise incompatible with EC/PC electrolytes. This is probably because BMC-based electrolytes form the solid electrolyte interphase (SEI) at more positive potential than electrolytes based on PC.

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