Reaction behavior of a silicide electrode with lithium in an ionic-liquid electrolyte

Yasuhiro Domi, Hiroyuki Usui, Kai Sugimoto, Kazuma Gotoh, Kei Nishikawa, Hiroki Sakaguchi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Silicides are attractive novel active materials for use in the negative-electrodes of next-generation lithium-ion batteries that use certain ionic-liquid electrolytes; however, the reaction mechanism of the above combination is yet to be clarified. Possible reactions at the silicide electrode are as follows: deposition and dissolution of Li metal on the electrode, lithiation and delithiation of Si, which would result from the phase separation of the silicide, and alloying and dealloying of the silicide with Li. Herein, we examined these possibilities using various analysis methods. The results revealed that the lithiation and delithiation of silicide occurred.

Original languageEnglish
Pages (from-to)22631-22636
Number of pages6
JournalACS Omega
Issue number35
Publication statusPublished - Sept 8 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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