High-performance hybrid supercapacitor with electrochemically exfoliated graphene oxide incorporated NiCo2O4 in aqueous and non-aqueous electrolytes

Pappu, S. and Anandan, S. and Martha, Surendra Kumar and et al, . (2022) High-performance hybrid supercapacitor with electrochemically exfoliated graphene oxide incorporated NiCo2O4 in aqueous and non-aqueous electrolytes. Journal of Energy Storage, 50. pp. 1-11. ISSN 2352-152X

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Abstract

Hydrothermal approach is employed to synthesize electrochemically exfoliated graphene oxide (EGO) integrated NiCo2O4 micro-flowers with nano petals. Specific capacity of 59 mAh g−1 (530 F g−1) is achieved by the optimized weight percentage of EGO in NiCo2O4 with long cyclic stability over 10,000 cycles. Detailed analysis on charge-storage properties of NiCo2O4–EGO composite reveals individual capacitive and diffusive contributions at various scan rates. An asymmetric supercapacitor device is fabricated with EGO incorporated NiCo2O4 composite material and commercial YP-50F carbon as positive and negative electrodes in 1 M TEABF4 acetonitrile organic electrolyte for the first time. The device delivers promising electrochemical performance with energy and power densities of 37.8 Wh kg−1 and 1350 W kg−1. Present work suggests an eco-friendly synthesis of EGO and provides a cost-effective facile approach for improving the overall electronic conductivity and cyclic stability of NiCo2O4 and other similar metal oxide materials for high-performance supercapacitors. © 2022 Elsevier Ltd

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IITH Creators:

IITH Creators	ORCiD
Martha, Surendra Kumar	UNSPECIFIED

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 further like to acknowledge Dr. Suhash Ranjan Dey, Dr. Sreekanth Mandati, and Mr. A. Harish Kumar for their support in characterization of the samples

Uncontrolled Keywords:

Electrochemical exfoliation; NiCo2O4–EGO composite; Organic electrolyte; Energy density; Power density

Subjects:

Others > Metallurgy Metallurgical Engineering
Chemistry
Materials Engineering > Materials engineering

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

24 Jun 2022 09:45

Last Modified:

27 Jun 2022 04:52