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Functionalized Carbonaceous Materials as Cathode for Lithium-Ion Batteries

Published online by Cambridge University Press:  13 June 2016

Hai Zhong
Affiliation:
National Key Laboratory of Science and Technology on Power Source, Tianjin Institute of Power Source, Tianjin, 300384, P. R. China
Chunhua Wang
Affiliation:
National Key Laboratory of Science and Technology on Power Source, Tianjin Institute of Power Source, Tianjin, 300384, P. R. China College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
Zhibin Xu
Affiliation:
National Key Laboratory of Science and Technology on Power Source, Tianjin Institute of Power Source, Tianjin, 300384, P. R. China
Fei Ding*
Affiliation:
National Key Laboratory of Science and Technology on Power Source, Tianjin Institute of Power Source, Tianjin, 300384, P. R. China
Xingjiang Liu
Affiliation:
National Key Laboratory of Science and Technology on Power Source, Tianjin Institute of Power Source, Tianjin, 300384, P. R. China
*
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Abstract

Activated carbon materials are integrated into functionalization of graphene nano-sheets to serve as a high-power lithium cathode. The electrochemical performance shows that the composite displays the highest reversible capacity (c. 170 mAh g-1) comparing with functionalized graphene and activated carbon. Also, approximately 92% of its capacity can be retained after 4,000 cycles at a current of 1 A g-1. Moreover, the composite exhibits an excellent rate performance, a reversible capacity of 90 mAh g-1 even at 6 A g-1, which corresponds to the power density of 15.2 kW kg-1 and energy density of 227 Wh kg-1, respectively. The high performance of this composite can be attributed to the fact that the activated carbon particles not only reduce the graphene sheet stacking thus making it easier for ions to diffuse, but also act as an ion storage buffer against accelerating electron transfer.

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Copyright
Copyright © Materials Research Society 2016 

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