Hydrothermal Synthesis of Cobalt Ruthenium Sulfides as Promising Pseudocapacitor Electrode Materialsopen access
- Authors
- Bolagam, Ravi; Um, Sukkee
- Issue Date
- Mar-2020
- Publisher
- MDPI
- Keywords
- cobalt ruthenium sulfide; supercapacitor; hydrothermal method; ternary metal sulfides; electrochemical impedance spectrum
- Citation
- COATINGS, v.10, no.3, pp.1 - 15
- Indexed
- SCIE
SCOPUS
- Journal Title
- COATINGS
- Volume
- 10
- Number
- 3
- Start Page
- 1
- End Page
- 15
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/10624
- DOI
- 10.3390/coatings10030200
- ISSN
- 2079-6412
- Abstract
- In this paper, we report the successful synthesis of cobalt ruthenium sulfides by a facile hydrothermal method. The structural aspects of the as-prepared cobalt ruthenium sulfides were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. All the prepared materials exhibited nanocrystal morphology. The electrochemical performance of the ternary metal sulfides was investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy techniques. Noticeably, the optimized ternary metal sulfide electrode exhibited good specific capacitances of 95 F g(-1) at 5 mV s(-1) and 75 F g(-1) at 1 A g(-1), excellent rate capability (48 F g(-1) at 5 A g(-1)), and superior cycling stability (81% capacitance retention after 1000 cycles). Moreover, this electrode demonstrated energy densities of 10.5 and 6.7 Wh kg(-1) at power densities of 600 and 3001.5 W kg(-1), respectively. These attractive properties endow proposed electrodes with significant potential for high-performance energy storage devices.
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