Volume 46, Issue 4 pp. 5250-5259
SHORT COMMUNICATION

Construction of hierarchical nickel cobalt sulfide@manganese oxide nanoarrays@nanosheets core-shell electrodes for high-performance electrochemical asymmetric supercapacitor

Vinayak G. Parale

Vinayak G. Parale

Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea

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Taehee Kim

Taehee Kim

Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea

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Amar M. Patil

Amar M. Patil

Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea

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Varsha D. Phadtare

Varsha D. Phadtare

Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea

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Haryeong Choi

Haryeong Choi

Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea

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Rushikesh P. Dhavale

Rushikesh P. Dhavale

Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea

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Younghun Kim

Younghun Kim

Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea

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Seong Chan Jun

Seong Chan Jun

Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea

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Hyung-Ho Park

Corresponding Author

Hyung-Ho Park

Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea

Correspondence

Hyung-Ho Park, Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea.

Email: [email protected]

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First published: 27 October 2021
Citations: 21

Vinayak G. Parale and Taehee Kim contributed equally to this work.

Funding information: National Research Foundation of Korea, Grant/Award Number: 2020R1A5A1019131

Summary

Core-shell nanostructured three-dimensional binderless electrode porosity makes them ideal candidates for electrochemical energy storage applications. This article proposes NiCo2S4@MnOx electrodes fabricated using a facile hydrothermal approach and subsequently annealed at 120°C for 12 hours. The resultant nanoarrays@nanosheets structure allows rapid ion and electron transport. Coating with pseudocapacitive MnOx on NiCo2S4 nanoarrays improves overall capacitance, and the amorphous MnOx nanosheets promote electrode cycling stability. The proposed NiCo2S4@MnOx electrode achieved excellent specific capacitance of 1640 F·g−1 at 5 mA·cm−2 and cyclic stability ≈ 90%; and the subsequently fabricated asymmetric electrochemical supercapacitor achieved specific capacitance ~96.91 F·g−1, and specific energy (SE) 26.38 Wh·kg−1 at specific power (SP) 466.66 W·kg−1, with impressive electrochemical stability ≈ 80% over 5000 charge/discharge cycles.

DATA AVAILABILITY STATEMENT

Data sharing is not applicable to this article as no new data were created or analyzed in this study.

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