Three-dimensional graphene-Co3O4 cathodes for rechargeable Li-O2 batteries

Jiakai Zhang, Pengfa Li, Zhenhua Wang, Jinshuo Qiao, David Rooney, Wang Sun*, Kening Sun

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)

Abstract

A three-dimensional (3D) graphene-Co3O4 electrode was prepared by a two-step method in which graphene was initially deposited on a Ni foam with Co3O4 then grown on the resulting graphene structure. Cross-linked Co3O4 nanosheets with an open pore structure were fully and vertically distributed throughout the graphene skeleton. The free-standing and binder-free monolithic electrode was used directly as a cathode in a Li-O2 battery. This composite structure exhibited enhanced performance with a specific capacity of 2453 mA h g-1 at 0.1 mA cm-2 and 62 stable cycles with 583 mA h g-1 (1000 mA h gcarbon-1). The excellent electrochemical performance is associated with the unique architecture and superior catalytic activity of the 3D electrode. 

Original languageEnglish
Pages (from-to)1504-1510
Number of pages7
JournalJournal of Materials Chemistry A
Volume3
Issue number4
Early online date19 Nov 2014
DOIs
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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