Needle-like NiCo2O4 Coated on Graphene Foam as a Flexible Cathode for Lithium-Oxygen Batteries

Yuexing Jiang, Lu Zou, Junfang Cheng, Yizhen Huang, Lichao Jia*, Bo Chi, Jian Pu, Jian Li

*この研究の対応する著者

研究成果: Article査読

19 被引用数 (Scopus)

抄録

The electrochemical performance of non-aqueous lithium-oxygen batteries depends largely on the catalytic activity of the cathode, among which the architecture design plays an important role. In this paper, we present a novel free-standing, flexible cathode with needle-like NiCo2O4 coated on a three-dimensional graphene framework. The hierarchical structure exhibits a macropore nest of graphene foam along with mesopore decoration of NiCo2O4 nanorods, which can provide fast diffusion or adsorption for the reactants and abundant active site for the oxygen reduction reaction and oxygen evolution reaction. With the novel cathode, the battery delivers a capacity about 5000 mAh g−1 at a current density of 400 mA g−1, and can cycle stably at least 80 times without obvious degradation at the capacity limitation of 1000 mAh g−1. This flexible cathode shows potential application in foldable electronic devices.

本文言語English
ページ(範囲)3140-3147
ページ数8
ジャーナルChemElectroChem
4
12
DOI
出版ステータスPublished - 2017 12月
外部発表はい

ASJC Scopus subject areas

  • 触媒
  • 電気化学

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