Porous NiCo2O4 nanotubes as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O2 batteries

Laiyang Li, Laifa Shen, Ping Nie, Gang Pang, Jie Wang, Hongsen Li, Shengyang Dong, Xiaogang Zhang*

*この研究の対応する著者

研究成果: Article査読

54 被引用数 (Scopus)

抄録

Porous NiCo2O4 nanotubes have been successfully synthesized using a facile and cost-effective electrospinning method and used as a noble-metal-free catalyst for rechargeable Li-O2 batteries. The as-synthesized NiCo2O4 nanotubes possess hollow cavities and porous walls, and were found to significantly improve the electrochemical performance of Li-O2 batteries, by endowing them with a high initial discharge capacity, reduced overpotential as well as good rate capability. Excellent cycling stability over 110 cycles with a highly discharged voltage platform of 2.4 V at 200 mA gc-1 was achieved. By means of FESEM, XRD, Raman spectroscopy and GITT analysis, toroidal-shaped Li2O2 particles were identified as the dominant discharge product and it was revealed that the Li2O2 can be completely decomposed during the charging process, indicating its superior reversibility as an effective bifunctional catalyst for Li-O2 batteries. All the results indicated that the porous NiCo2O4 nanotubes expressed intriguing properties and great potential applications as a noble-metal-free effective bifunctional catalyst for rechargeable Li-O2 batteries.

本文言語English
ページ(範囲)24309-24314
ページ数6
ジャーナルJournal of Materials Chemistry A
3
48
DOI
出版ステータスPublished - 2015
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)

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