Dual-carbon battery using high concentration LiPF6 in dimethyl carbonate (DMC) electrolyte

Seiji Miyoshi, Hiroki Nagano, Taro Fukuda, Takuya Kurihara, Motonori Watanabe, Shintaro Ida, Tatsumi Ishihara

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

The effects of LiPF6 concentration in ethylene carbonate (EC)-dimethyl carbonate (DMC) on PF6- intercalation into graphitic carbon were studied for a high-energy-density dual-carbon battery. The capacity as well as potential for PF6- intercalation decreased with increasing LiPF6 concentration when EC-DMC was used as an electrolyte. Low-viscosity carbonate was found to be suitable as a high-concentration LiPF6 electrolyte, and DMC is thus a promising electrolyte for high-concentration LiPF6. The PF6- intercalation capacity as well as the intercalation potential in 3.7 M LiPF6/DMC (100 mAh g-1) were almost the same as those in 1 M LiPF6/EC-DMC (89 mAh g-1). Considering the anode capacity, 3.1 M LiPF6 is suitable for the full cell. Using 3.1 M LiPF6 in DMC, the energy density of the dual-carbon battery could be significantly increased.

Original languageEnglish
Pages (from-to)A1206-A1213
JournalJournal of the Electrochemical Society
Volume163
Issue number7
DOIs
Publication statusPublished - Jan 1 2016

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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