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Issue 18, 2018
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Facile synthesis of a hierarchical CuS/CuSCN nanocomposite with advanced energy storage properties

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Abstract

We introduce CuS/CuSCN nanocomposites as active materials in pseudocapacitors, in which the redox reactions of both CuS and CuSCN simultaneously contribute to energy storage. This nanocomposite is prepared using an in situ methodology via facile, low-energy-consuming green nanochemistry. The CuS/CuSCN nanocomposites offer a high capacitance compared to their individual constituents. CuS nanorods (∼15 nm) are anchored on the surface of CuSCN nanosheets (∼100 nm) and they interconnect the CuSCN nanosheets, producing mesoporous nanoclusters with a large surface area, thus improving the charge transfer efficiency. The CuS/CuSCN nanocomposites exhibit high electrical conductivity and strong redox reactivity, and in particular, the pseudocapacitor with a compositional ratio of 1 : 1 exhibits the highest charge transfer efficiency. Consequently, the 1 : 1 CuS/CuSCN active material exhibits a high energy density (approximately 63 W h kg−1) and a high power density (1.9 kW kg−1 at 9.0 W h kg−1) as a single electrode. The highest specific capacitance is measured to be 1787.3 F g−1 in the single electrode. Furthermore, an aqueous asymmetric hybrid supercapacitor based on the CuS/CuSCN 1 : 1//activated carbon (AC) shows an approximately four times increase in the power density (7.9 kW kg−1), compared to the single electrode.

Graphical abstract: Facile synthesis of a hierarchical CuS/CuSCN nanocomposite with advanced energy storage properties

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Publication details

The article was received on 08 Jun 2018, accepted on 03 Aug 2018 and first published on 06 Aug 2018


Article type: Paper
DOI: 10.1039/C8NJ02843E
Citation: New J. Chem., 2018,42, 15387-15396
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    Facile synthesis of a hierarchical CuS/CuSCN nanocomposite with advanced energy storage properties

    Y. Y. Kannangara, P. Prabunathan and J. Song, New J. Chem., 2018, 42, 15387
    DOI: 10.1039/C8NJ02843E

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