Journal
ELECTROCHIMICA ACTA
Volume 64, Issue -, Pages 23-28Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.12.040
Keywords
Reduced graphene oxide; Nickel oxide; Lithium ion batteries; Anode; Homogeneous coprecipitation
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Funding
- Natural Science Foundation of Hubei Province [2011CDB161]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (SRF for ROCS, SEM)
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Reduced graphene oxide and nickel oxide composite was prepared by homogeneous coprecipitation and subsequent annealing. Characterizations show that NiO particles have a nanosheet-based microsphere structure and anchor uniformly on the surface of reduced graphene oxide platelets. As an anode for Li ion batteries, the composite has 1641 mAh g(-1) and 1097 mAh g(-1) specific capacities for the first discharge and charge, respectively, higher than the theoretical capacity of NiO. It shows an excellent cycling performance with a discharge capacity of 1041 mAh g(-1) after 50 cycles at a current of 100 mA g(-1), and has a good rate capacity with 727 mAh g(-1) at a current of 1600 mA g(-1). The results show a synergistic effect of nanosheet-based NiO microspheres and reduced graphene oxide platelets in the composite for improved electrochemical performance. (C) 2011 Elsevier Ltd. All rights reserved.
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