Hierarchical nanostructured MnCo2O4–NiCo2O4 composites as innovative electrodes for supercapacitor applications

Han-Min Lee; Chandu V. V. Muralee Gopi; Prem Jyoti Singh Rana; Rajangam Vinodh; Sanghyun Kim; R. Padma; Hee-Je Kim

doi:10.1039/C8NJ03764G

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Hierarchical nanostructured MnCo₂O₄–NiCo₂O₄ composites as innovative electrodes for supercapacitor applications†

Han-Min Lee,^a Chandu V. V. Muralee Gopi,

*^a Prem Jyoti Singh Rana,^a Rajangam Vinodh,^a Sanghyun Kim,^b R. Padma^cd and Hee-Je Kim

*^a

Author affiliations

* Corresponding authors

^a School of Electrical and Computer Engineering, Pusan National University, Gumjeong-Ku, Jangjeong-Dong, Busan 46241, South Korea
E-mail: heeje@pusan.ac.kr, naga5673@gmail.com
Fax: +82 51 513 0212
Tel: +82 51 510 2364

^b Department of Civil and Environmental Engineering, Pusan National University, Busan 46241, South Korea

^c Department of Physics, Sri Venkateswara University, Tirupati 517 502, India

^d School of Mechanical Engineering, Yonsei University, Seoul 120-749, Republic of Korea

Abstract

NiCo₂O₄ (NCO) nanosheet decorated MnCo₂O₄ (MCO) nanoflakes are successfully prepared on a nickel foam surface using a one-step chemical bath deposition route for supercapacitor applications. The unique nanoflakes with nanosheet structures provide efficient pathways for rapid electron and ion transportation. As a result, the MCO–NCO composite electrode exhibits a higher specific capacitance of 1152 F g⁻¹ at 1 A g⁻¹, excellent rate capability and superior cycling stability (95.38% retention after 3000 cycles) compared to individual MCO nanoflakes and NCO nanosheets. These results show that the as-fabricated MCO–NCO composites are promising candidates for electrochemical supercapacitors.

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Article information

DOI: https://doi.org/10.1039/C8NJ03764G
Article type: Letter
Submitted: 28 Jul 2018
Accepted: 28 Sep 2018
First published: 28 Sep 2018

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New J. Chem., 2018,42, 17190-17194

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Hierarchical nanostructured MnCo₂O₄–NiCo₂O₄ composites as innovative electrodes for supercapacitor applications

H. Lee, C. V. V. Muralee Gopi, P. J. S. Rana, R. Vinodh, S. Kim, R. Padma and H. Kim, New J. Chem., 2018, 42, 17190 DOI: 10.1039/C8NJ03764G

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