Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 116, Issue 39, Pages 20794-20799Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp3070147
Keywords
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Funding
- Natural Science Foundation of China [51002057, 21271078, 50825203]
- 863 program [2009AA03Z225]
- Natural Science Foundation of Hubei Province [2008CDA026]
- PCSIRT (Program for Changjiang Scholars and Innovative Research Team in University)
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Transition metal oxides are promising high-capacity anode materials for next-generation lithium-ion batteries. However, their cycle life remains insufficient for commercial applications. Developing transition-metal oxide anode materials with a long lifespan through a facile route has become an important issue. This work reports the fabrication of ultrathin CoO/graphene hybrid nanosheets consisting of ultrafine CoO nanoparticles (similar to 5 nm) densely anchored on the graphene nanosheets. They exhibit a high reversible capacity of similar to 1018.0 mAh g(-1) over 520 discharge/charge cycles, and the Coulombic efficiency remains similar to 100% upon cycling, indicating excellent cyclability. The as-obtained CoO/graphene nanocomposite avoids the widespread problem of cracking or pulverization of transition-metal oxide anode materials upon cycling and retains its original morphology and structure even after 520 discharge/charge cycles, benefiting from the synergetic effects of ultrafine CoO nanoparticles and the conductive graphene nanosheets.
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