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Issue 25, 2014
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Graphene fiber-based asymmetric micro-supercapacitors

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Abstract

Fiber-based micro-supercapacitors (F-mSCs) are new members of the energy storage family, which facilitate SCs with flexibility and expand their application to fields such as tiny, flexible and wearable devices. One of the biggest challenges for F-SCs is to enhance the energy density (E) and keep the flexibility at the same time. Here, for the first time we assembled a type of fiber-based asymmetric micro-supercapacitors (F-asym-mSCs) with two different graphene fiber-based electrodes. The excellent electrochemical performances (59.2 mF cm−2 and 32.6 mF cm−2) of both electrodes offered a chance to achieve high performance two-ply F-asym-mSCs. The potential window of F-asym-mSCs was expanded to 1.6 V, and both the area energy density (EA: 11.9 μW h cm−2) and the volume energy density (EV: 11.9 mW h cm−3) are the highest E ever reported in F-SCs. The F-asym-mSCs exhibit good cycling stability with a 92.7% initial capacitance retention after 8000 cycles and can be integrated into a fiber-like device to realize the flexibility of fibers.

Graphical abstract: Graphene fiber-based asymmetric micro-supercapacitors

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Publication details

The article was received on 16 Apr 2014, accepted on 28 Apr 2014 and first published on 28 Apr 2014


Article type: Paper
DOI: 10.1039/C4TA01868K
Citation: J. Mater. Chem. A, 2014,2, 9736-9743
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    Graphene fiber-based asymmetric micro-supercapacitors

    B. Zheng, T. Huang, L. Kou, X. Zhao, K. Gopalsamy and C. Gao, J. Mater. Chem. A, 2014, 2, 9736
    DOI: 10.1039/C4TA01868K

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