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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)3140-3147
Number of pages8
JournalChemElectroChem
Volume4
Issue number12
DOIs
Publication statusPublished - 2017 Dec
Externally publishedYes

Keywords

  • graphene foam
  • lithium-oxygen batteries
  • nickel-cobalt spinel
  • three-dimensional cathode

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

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