Structural analysis of highly-durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries

Hiroki Nara, Tokihiko Yokoshima, Mitsutoshi Otaki, Toshiyuki Momma, Tetsuya Osaka*

*この研究の対応する著者

研究成果: Article査読

28 被引用数 (Scopus)

抄録

The structure of the highly durable silicon-based anode prepared by electrodeposition was investigated for volume change and chemical structure. With repeated charge-discharge cycles, the volume change resulting from the anode film thickness decreased, and, after 100 cycles, essentially no difference was observed between the charged and discharged states. The buffering effect of the volume change was considered to be achieved by the formation of Li 2O, Li2CO3, and lithium silicates such as Li4SiO4, whose existence were supported by STEM, EELS, and XPS analyses. From the structural analyses, the main reactions related to the capacity of the silicon-based anode were considered to be the formation of LixSi and Li2Si2O5. LixSi and Li2Si2O5 can be delithiated into Si and SiO2, respectively.

本文言語English
ページ(範囲)403-410
ページ数8
ジャーナルElectrochimica Acta
110
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • 化学工学(全般)
  • 電気化学

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