Volume 45, Issue 4 pp. 5988-6001
RESEARCH ARTICLE

Metal-organic framework-derived carbon-cobalt oxysulfide nanocage heterostructure electrode for efficient hybrid supercapacitors

Kugalur Shanmugam Ranjith

Kugalur Shanmugam Ranjith

Department of Energy and Material Engineering, Dongguk University, Seoul, South Korea

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Ganji Seeta Rama Raju

Ganji Seeta Rama Raju

Department of Energy and Material Engineering, Dongguk University, Seoul, South Korea

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Cheol Hwan Kwak

Cheol Hwan Kwak

Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, South Korea

Department of Biological Engineering, Inha University, Incheon, South Korea

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Seyed Majid Ghoreishian

Seyed Majid Ghoreishian

Department of Biological Engineering, Inha University, Incheon, South Korea

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Yun Suk Huh

Corresponding Author

Yun Suk Huh

Department of Biological Engineering, Inha University, Incheon, South Korea

Correspondence

Yun Suk Huh, Department of Biological Engineering, Inha University, Incheon 22212, South Korea.

Email: [email protected]

Ji Sun Im, Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology, Daejeon, South Korea

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Young-Kyu Han, Department of Energy and Material Engineering, Dongguk University, Seoul, South Korea

Email: [email protected]

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Ji Sun Im

Corresponding Author

Ji Sun Im

Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, South Korea

Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Daejeon, South Korea

Correspondence

Yun Suk Huh, Department of Biological Engineering, Inha University, Incheon 22212, South Korea.

Email: [email protected]

Ji Sun Im, Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology, Daejeon, South Korea

Email: [email protected]

Young-Kyu Han, Department of Energy and Material Engineering, Dongguk University, Seoul, South Korea

Email: [email protected]

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Young-Kyu Han

Corresponding Author

Young-Kyu Han

Department of Energy and Material Engineering, Dongguk University, Seoul, South Korea

Correspondence

Yun Suk Huh, Department of Biological Engineering, Inha University, Incheon 22212, South Korea.

Email: [email protected]

Ji Sun Im, Carbon Industry Frontier Research Center, Korea Research Institute of Chemical Technology, Daejeon, South Korea

Email: [email protected]

Young-Kyu Han, Department of Energy and Material Engineering, Dongguk University, Seoul, South Korea

Email: [email protected]

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First published: 25 November 2020
Citations: 11

Summary

Construction of hybrid supercapacitors (HSCs) with defect engineered electrodes derived from single metal-organic frameworks (zeolitic imidazolate frameworks, ZIF-67) via control of the thermal influences showed unique structural features and rich electrochemical properties. Designing the three-dimensional Co oxysulfide nanograins with carbon frame (CoOS-C)-based positive electrode surfaces through sulfidation with tunable defect states along with N- and S-doping states improved the electrical energy storage; further, the possibility of having a carbon-based skeleton surface influenced the effective rate capability during the charge-discharge process. This unique nanostructural feature with encapsulation of porous N- and S-doped graphitic carbon enabled improved rate performance by enhancing the stability of the electrode material and shortening the ion-diffusion paths by the synergistic effect. Owing to the tunable defect functionality, the CoOS-C based electrode exhibited a high storage capacity of 708.8 C g−1 at 1 A g−1 and an excellent rate capability with long-term cyclic stability, with more than 93% capacity retention after 3000 cycles. Furthermore, the fabricated HSCs operated within a wide potential window of 1 to 1.6 V, which allowed excellent rate capability with a high-energy density of 31.7 W h kg−1 at a specific power density of 800 W kg−1 with long-term cyclic stability up to 10 000 cycles.

CONFLICT OF INTEREST

The authors declare no conflicts of interest.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available upon request.

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