Polyterthiophene/CNT composite as a cathode material for lithium batteries employing an ionic liquid electrolyte

S. R. Sivakkumar*, Patrick C. Howlett, Bjorn Winther Jensen, Maria Forsyth, Douglas R. MacFarlane

*この研究の対応する著者

研究成果: Article査読

34 被引用数 (Scopus)

抄録

A polyterthiophene (PTTh)/multi-walled carbon nanotube (CNT) composite was synthesised by in situ chemical polymerisation and used as an active cathode material in lithium cells assembled with an ionic liquid (IL) or conventional liquid electrolyte, LiBF4/EC-DMC-DEC. The IL electrolyte consisted of 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) containing LiBF4 and a small amount of vinylene carbonate (VC). The lithium cells were characterised by cyclic voltammetry (CV) and galvanostatic charge/discharge cycling. The specific capacity of the cells with IL and conventional liquid electrolytes after the 1st cycle was 50 and 47 mAh g-1 (based on PTTh weight), respectively at the C/5 rate. The capacity retention after the 100th cycle was 78% and 53%, respectively. The lithium cell assembled with a PTTh/CNT composite cathode and a non-flammable IL electrolyte exhibited a mean discharge voltage of 3.8 V vs Li+/Li and is a promising candidate for high-voltage power sources with enhanced safety.

本文言語English
ページ(範囲)6844-6849
ページ数6
ジャーナルElectrochimica Acta
54
27
DOI
出版ステータスPublished - 2009 11月 30
外部発表はい

ASJC Scopus subject areas

  • 電気化学
  • 化学工学(全般)

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