Mixed ether-based solvents provide a long cycle life with high rate capability to graphite anodes for Na-ion batteries

Tetsuya Kajita, Takashi Itoh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Energy storage devices using sodium ions have great potential in terms of their low cost, high power, and long life. In particular, there could be a significant cost reduction, because of the abundant resource of sodium. Recently, electro-chemical sodium storage performance has been demonstrated in graphite anodes using ether-based solvents. However, the high power and long life were not compatible in the same ether solution. Here, we demonstrated using mixed ether-based solvents that a long cycle life and high rate capability can coexist in the graphite anodes for sodium-ion batteries. The cycle performance indicated that the discharge capacity retention ratio after 10000 cycles was more than 90% and the capability of 4 A g-1/0.2 A g-1 (40C/2C) was more than 75%. These results could advance the development of sodium storage devices for practical use.

Original languageEnglish
Pages (from-to)2188-2195
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume20
Issue number4
DOIs
Publication statusPublished - 2018 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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