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Issue 10, 2012
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Activated graphene as a cathode material for Li-ion hybrid supercapacitors

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Abstract

Chemically activated graphene (‘activated microwave expanded graphite oxide’, a-MEGO) was used as a cathode material for Li-ion hybrid supercapacitors. The performance of a-MEGO was first verified with Li-ion electrolyte in a symmetrical supercapacitor cell. Hybrid supercapacitors were then constructed with a-MEGO as the cathode and with either graphite or Li4Ti5O12 (LTO) for the anode materials. The results show that the activated graphene material works well in a symmetrical cell with the Li-ion electrolyte with specific capacitances as high as 182 F g−1. In a full a-MEGO/graphite hybrid cell, specific capacitances as high as 266 F g−1 for the active materials at operating potentials of 4 V yielded gravimetric energy densities for a packaged cell of 53.2 W h kg−1.

Graphical abstract: Activated graphene as a cathode material for Li-ion hybrid supercapacitors

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Publication details

The article was received on 25 Oct 2011, accepted on 04 Jan 2012 and first published on 01 Feb 2012


Article type: Paper
DOI: 10.1039/C2CP00017B
Citation: Phys. Chem. Chem. Phys., 2012,14, 3388-3391
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    Activated graphene as a cathode material for Li-ion hybrid supercapacitors

    M. D. Stoller, S. Murali, N. Quarles, Y. Zhu, J. R. Potts, X. Zhu, H. Ha and R. S. Ruoff, Phys. Chem. Chem. Phys., 2012, 14, 3388
    DOI: 10.1039/C2CP00017B

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