Journal
CARBON
Volume 49, Issue 1, Pages 326-332Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2010.09.033
Keywords
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Funding
- Korean Government (MEST) [NRF-2009-0094219]
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A Co3O4/graphene hybrid material was fabricated using a simple in situ reduction process and demonstrated as a highly reversible anode for lithium rechargeable batteries The hybrid is composed of 5 nm size Co3O4 particles uniformly dispersed on graphene, as observed by transmission electron microscopy, atomic force microscopy, Raman spectroscopy and X ray diffraction analysis The Co3O4/graphene anode can deliver a capacity of more than 800 mA h g(-1) reversibly at a 200 mA g(-1) rate in the voltage range between 3 0 and 0 001 V The high reversible capacity is retained at elevated current densities At a cur rent rate as high as 1000 mA g, the Co3O4/graphene anode can deliver more than 550 mA h g(-1), which is significantly higher than the capacity of current commercial graphite anodes The superior electrochemical performance of the Co3O4/graphene is attributed to its unique nanostructure, which intimately combines the conductive graphene network with uniformly dispersed nano Co3O4 particles (C) 2010 Elsevier Ltd All rights reserved
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