Gallium (III) sulfide as an active material in lithium secondary batteries

Hiroshi Senoh, Hiroyuki Kageyama, Tomonari Takeuchi, Koji Nakanishi, Toshiaki Ohta, Hikari Sakaebe, Masaru Yao, Tetsuo Sakai, Kazuaki Yasuda

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

In an attempt to identify an active material for use in lithium secondary batteries with high energy density, we investigated the electrochemical properties of gallium (III) sulfide (Ga2S3) at 30 °C. Ga2S3 shows two sloping plateaus in the potential range between 0.01 V and 2.0 V vs. (Li/Li+). The specific capacity of the Ga2S3 electrode in the first delithiation is ca. 920 mAh g-1, which corresponds to 81% of the theoretical capacity (assuming a 10-electron reaction). The capacity in the 10th cycle is 63% of the initial capacity. Ex situ X-ray diffraction and X-ray absorption fine structure analyses revealed that the reaction of the Ga2S3 electrode proceeds in two steps: Ga2S3 + 6Li+ + 6e - 2Ga + 3Li2S and Ga + xLi+ + xe- LixGa.

Original languageEnglish
Pages (from-to)5631-5636
Number of pages6
JournalJournal of Power Sources
Volume196
Issue number13
DOIs
Publication statusPublished - Jul 1 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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