Chalcogenide solution-mediated activation protocol for scalable and ultrafast synthesis of single-crystalline 1-D copper sulfide for supercapacitors
- Authors
- Hong, John; Kim, Byung-Sung; Yang, Seungmo; Jang, A-Rang; Lee, Young-Woo; Pak, Sangyeon; Lee, Sanghyo; Cho, Yuljae; Kang, Dongwoo; Shin, Hyeon Suk; Hong, Jin Pyo; Morris, Stephen M.; Cha, SeungNam; Sohn, Jung Inn; Kim, Jong Min
- Issue Date
- Feb-2019
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.6, pp.2529 - 2535
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 7
- Number
- 6
- Start Page
- 2529
- End Page
- 2535
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/148396
- DOI
- 10.1039/c8ta10743b
- ISSN
- 2050-7488
- 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 degrees 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 solutionbased sulfur activation method.
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