Cost‐Effective Synthesis of Electrodeposited NiCo 2 O 4 Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors

Pappu, Samhita and Nanaji, Katchala and Mandati, Sreekanth and Rao, Tata N. and Martha, Surendra Kumar and et al, . (2020) Cost‐Effective Synthesis of Electrodeposited NiCo 2 O 4 Nanosheets with Induced Oxygen Vacancies: A Highly Efficient Electrode Material for Hybrid Supercapacitors. Batteries & Supercaps, 3 (11). pp. 1209-1219. ISSN 2566-6223

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Abstract

Nanostructured transition metal oxide synthesis possessing high energy density and stability is desirable for supercapacitors. Herein, we synthesize three-dimensional NiCo2O4 (NCO) nanosheets with oxygen vacancies induced by sustainable and environmentally benign electrodeposition assisted chemical reduction process. Oxygen vacancies increase the conductivity, adsorptivity, and the active surface area, thereby enhancing the charge storage capabilities. The binder-free NCO delivers the highest specific capacitance (Csp) of 2065 F g−1 at 1 A g−1, retaining 89.30 % of its initial value at 10 A g−1 after 10,000 continuous charge-discharge (CD) cycles. An asymmetric supercapacitor (ASC) fabricated shows remarkable electrochemical properties with high energy density (Emax) of 28.6 Wh kg−1 and power density (Pmax) of 7.5 kW kg−1. The assembled ASC reports exceptional cyclic retention of 90.6 % for 10,000 CD cycles with practical demonstration. The approach used herein is suitable for eco-friendly supercapacitor electrode fabrication with large scale manufacturing capability and less capital investment. © 2020 Wiley-VCH GmbH

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IITH Creators:

IITH Creators	ORCiD
Martha, Surendra Kumar	https://orcid.org/0000-0002-7762-7237

Item Type:

Article

Additional Information:

The authors acknowledge the financial support received from the ARCI-technical research center {ref. AI/1/65/ARCI/2014 (c)} funded by the Department of Science and Technology (DST), Government of India. The authors would also like to acknowledge Dr. Srinivasan Anandan, Mr. M Ramakrishna, and Mr. K. Ramesh Reddy for their support in characterizations.

Uncontrolled Keywords:

Asymmetric supercapacitor; Electrodeposition; Nanosheets; NiCo2O4; Oxygen vacancies

Subjects:

Chemistry

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

28 Oct 2022 04:10

Last Modified:

28 Oct 2022 04:10