Trivalent Ti self-doped Li4Ti5O12: A high performance anode material for lithium-ion capacitors

Shengyang Dong, Xiaoyan Wang, Laifa Shen, Hongsen Li, Jie Wang, Ping Nie, Jingjie Wang, Xiaogang Zhang*

*この研究の対応する著者

研究成果査読

53 被引用数 (Scopus)

抄録

To enhance kinetics of lithium insertion/extraction of anode materials for hybrid lithium-ion capacitors (hybrid LICs), we develop a new applicable strategy toward the synthesis of trivalent Ti self-doped Li4Ti5O12 nanoparticles. Starting with Ti2O3, we show that subsequent solid state reaction with Li2CO3 leads to the formation of trivalent Ti self-doped Li4Ti5O12. The presence of trivalent Ti gives rise to high electric conductivity and the nanostructure reduces the transport path lengths of lithium-ions and electrons, permitting fast kinetics for both transported lithium-ions and electrons, thus enabling high-power performance. A high performance hybrid LIC is fabricated by using Ti3 + self-doped Li4Ti5O12 as an insertion-type anode and activated carbon derived from outer peanut shell as cathode, which delivers high energy density (67 Wh kg- 1), high power density (8000 W kg- 1). Additionally, the device still retains about 79% of its original capacity even after 5000 cycles at 0.5 A g- 1.

本文言語English
ページ(範囲)1-7
ページ数7
ジャーナルJournal of Electroanalytical Chemistry
757
DOI
出版ステータスPublished - 2015 11 15
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 化学工学(全般)
  • 電気化学

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