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Issue 10, 2018
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Flower-like Cu2NiSnS4 microspheres for application as electrodes of asymmetric supercapacitors endowed with high energy density

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Abstract

Design of electrode materials for supercapacitors using earth-abundant and less-toxic metals is both cost effective and environmentally benign. The present study deals with the synthesis of flower-like Cu2NiSnS4 microspheres (FCMs) and utilizing the same as positive electrodes of solid-state asymmetric supercapacitors. Citric acid was used for the synthesis of Cu2NiSnS4 as the structure directing agent; a possible growth mechanism of the formation of flower-like microspheres is proposed. The as-prepared FCMs on nickel foam demonstrated a high specific capacitance of 1639 F g−1 at a scan rate of 5 mV s−1. The as-fabricated solid-state asymmetric device achieved high values of volumetric (8.81 F cm−3) and gravimetric (105.7 F g−1) capacitances. The device attained the maximum energy density of 2.57 mW h cm−3/30.88 W h kg−1 and high power density of 201.4 mW cm−3/2.42 kW kg−1. Superior capacitance retention of the device was confirmed as it maintained 95.7% of the initial capacitance after 2000 cycles. Thus, by effective integration on a large-scale basis, these supercapacitors have great potential for the development of sustainable energy storage systems using low-cost earth-abundant materials.

Graphical abstract: Flower-like Cu2NiSnS4 microspheres for application as electrodes of asymmetric supercapacitors endowed with high energy density

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Publication details

The article was received on 05 Dec 2017, accepted on 05 Feb 2018 and first published on 05 Feb 2018


Article type: Paper
DOI: 10.1039/C7CE02101A
Citation: CrystEngComm, 2018,20, 1443-1454
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    Flower-like Cu2NiSnS4 microspheres for application as electrodes of asymmetric supercapacitors endowed with high energy density

    S. Sarkar, P. Howli, U. K. Ghorai, B. Das, M. Samanta, N. S. Das and K. K. Chattopadhyay, CrystEngComm, 2018, 20, 1443
    DOI: 10.1039/C7CE02101A

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