Accession Number:

ADA579339

Title:

Exfoliation and Reassembly of Cobalt Oxide Nanosheets into a Reversible Lithium-Ion Battery Cathode

Descriptive Note:

Journal article

Corporate Author:

NORTHWESTERN UNIV EVANSTON IL DEPT OF CHEMISTRY

Report Date:

2012-01-01

Pagination or Media Count:

10.0

Abstract:

An exfoliation reassembly activation ERA approach to lithium-ion battery cathode fabrication is introduced, demonstrating that inactive HCoO2 powder can be converted into a reversible Lisub 1-xHsub xCoOsub 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 HCoOsub 2 via a combination of chemical and mechanical exfoliation generates a highly processable aqueous dispersion of CoOsub 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 LiCoOsub 2 83 mAh gexpn 1, with this good electrochemical performance attributable to the high degree of order in the reassembled cathode.

Subject Categories:

  • Inorganic Chemistry
  • Electrical and Electronic Equipment
  • Electrochemical Energy Storage
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE