Feasibility of an interpenetrated polymer network system made of Di-block copolymer composed of polyethylene oxide and polystyrene as the gel electrolyte for lithium secondary batteries

Hiroki Nara*, Toshiyuki Momma, Tetsuya Osaka

*この研究の対応する著者

研究成果査読

9 被引用数 (Scopus)

抄録

The feasibility of a di-block copolymer, composed of a polyethylene oxide (PEO) chain and a polystyrene (PS) chain covalently bonded, as the gel electrolyte for lithium secondary batteries was investigated. The PEO-PS di-block copolymer gel electrolyte showed a high ionic conductivity of∼ 1 mS/cm at room temperature. Moreover, it retained good mechanical strength within a co-continuous phase separated structure, and it suppressed the dendritic deposition of Li. Indications were that the interface between the electrolyte and the Li metal was chemically stable, as a result of the PEO phase fixed to PS by covalent bonding. In addition, it was indicated that the Li/PEO-PS di-block copolymer gel electrolyte/LiFeP04 cell had a high charge-discharge efficiency of∼99% during 30 cycles, while maintaining a discharge capacity of 124 mAh/g.

本文言語English
ページ(範囲)276-281
ページ数6
ジャーナルElectrochemistry
76
4
DOI
出版ステータスPublished - 2008 4

ASJC Scopus subject areas

  • 電気化学

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