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Issue 6, 2019
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Chalcogenide solution-mediated activation protocol for scalable and ultrafast synthesis of single-crystalline 1-D copper sulfide for supercapacitors

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Abstract

Traditional synthetic routes for transition metal sulfides typically involve solution and thermal-based processes to exploit their favorable pseudo-capacitive properties. However, there is a practical need to develop alternative processes to fabricate metal sulfide electrodes because of the time-consuming processes (>12 h), additional heat-treatment to active reactants, relatively high post-heat-treatment temperature (200–400 °C) and non-scalable nature of existing synthetic routes. Herein, utilizing a solution-based sulfur precursor, one-dimensional single-crystalline Cu2S nanostructures have been successfully prepared via a solution-based direct synthesis process within 10 min at room temperature without the need for thermal treatment steps. The fabricated electrode exhibits a capacitance of 750 mF cm−2 at a current density of 2 mA cm−2. Moreover, the rate capacitance is maintained at about 82.3% as the current density is increased to 40 mA cm−2, and the capacity retains 90.5% of the initial value after 20 000 cycles. Importantly, as this method involves a solution-based formulation it is compatible with roll-to-roll processes, which is promising for mass and scalable production of the electrodes. The synthetic method ensures a facile and efficient approach to fabricating scalable one-dimensional single crystalline Cu2S nanostructures, highlighting the uniqueness of the solution-based sulfur activation method.

Graphical abstract: Chalcogenide solution-mediated activation protocol for scalable and ultrafast synthesis of single-crystalline 1-D copper sulfide for supercapacitors

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Publication details

The article was received on 08 Nov 2018, accepted on 18 Jan 2019 and first published on 19 Jan 2019


Article type: Communication
DOI: 10.1039/C8TA10743B
J. Mater. Chem. A, 2019,7, 2529-2535

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    Chalcogenide solution-mediated activation protocol for scalable and ultrafast synthesis of single-crystalline 1-D copper sulfide for supercapacitors

    J. Hong, B. Kim, S. Yang, A. Jang, Y. Lee, S. Pak, S. Lee, Y. Cho, D. Kang, H. S. Shin, J. P. Hong, Stephen M. Morris, S. Cha, J. I. Sohn and J. M. Kim, J. Mater. Chem. A, 2019, 7, 2529
    DOI: 10.1039/C8TA10743B

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