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Issue 3, 2013
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Unveiling organic–inorganic hybrids as a cathode material for high performance lithium-ion capacitors

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Abstract

Novel Li-ion hybrid supercapacitors were developed containing composite cathodes of a conducting polymer – either polyaniline (PANI) or polypyrrole (PPy) – with Li(Mn1/3Ni1/3Fe1/3)O2 nanoparticles. Activated carbon (AC) anodes were used in the presence of an organic electrolyte. Using a PANI composite electrode resulted in a cell with outstanding supercapacitive behavior, even at high currents. It showed better cycleability than the cells using a PPy composite electrode or pristine material. The cell with a PANI composite electrode delivered high specific capacitances of 140, 93, and 56 F g−1 at current densities of 0.72, 1.45 and 2.15 A g−1, respectively. The observed capacitances are the best yet reported for hybrid supercapacitors based on Li-intercalating materials in organic electrolytes. The hybrid supercapacitor containing PANI delivered maximum energy and power densities of 49 W h kg−1 and 3 kW kg−1, respectively. These results demonstrate the potential of developing polymer-encapsulated, Li-intercalating materials for high-performance, Li-ion, hybrid supercapacitors.

Graphical abstract: Unveiling organic–inorganic hybrids as a cathode material for high performance lithium-ion capacitors

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Publication details

The article was received on 04 Oct 2012, accepted on 12 Oct 2012 and first published on 18 Oct 2012


Article type: Paper
DOI: 10.1039/C2TA00553K
Citation: J. Mater. Chem. A, 2013,1, 707-714
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    Unveiling organic–inorganic hybrids as a cathode material for high performance lithium-ion capacitors

    K. Karthikeyan, S. Amaresh, V. Aravindan, H. Kim, K. S. Kang and Y. S. Lee, J. Mater. Chem. A, 2013, 1, 707
    DOI: 10.1039/C2TA00553K

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