Exfoliation and reassembly of cobalt oxide nanosheets into a reversible lithium-ion battery cathode.

Published

Journal Article

An exfoliation-reassembly-activation (ERA) approach to lithium-ion battery cathode fabrication is introduced, demonstrating that inactive HCoO(2) powder can be converted into a reversible Li(1-x) H(x) CoO(2) thin-film cathode. This strategy circumvents the inherent difficulties often associated with the powder processing of the layered solids typically employed as cathode materials. The delamination of HCoO(2) via a combination of chemical and mechanical exfoliation generates a highly processable aqueous dispersion of [CoO(2) ](-) nanosheets that is critical to the ERA approach. Following vacuum-assisted self-assembly to yield a thin-film cathode and ion exchange to activate this material, the generated cathodes exhibit excellent cyclability and discharge capacities approaching that of low-temperature-prepared LiCoO(2) (~83 mAh g(-1) ), with this good electrochemical performance attributable to the high degree of order in the reassembled cathode.

Full Text

Duke Authors

Cited Authors

  • Compton, OC; Abouimrane, A; An, Z; Palmeri, MJ; Brinson, LC; Amine, K; Nguyen, ST

Published Date

  • April 2012

Published In

Volume / Issue

  • 8 / 7

Start / End Page

  • 1110 - 1116

PubMed ID

  • 22315165

Pubmed Central ID

  • 22315165

Electronic International Standard Serial Number (EISSN)

  • 1613-6829

International Standard Serial Number (ISSN)

  • 1613-6810

Digital Object Identifier (DOI)

  • 10.1002/smll.201101131

Language

  • eng