Titania supported bio-derived activated carbon as an electrode material for high-performance supercapacitors

Bortamuly, Rajashree and Naresh, Vangapally and Das, Manash R. and Kumar, V. Kiran and Muduli, Sadananda and Martha, Surendra K. and et al, . (2021) Titania supported bio-derived activated carbon as an electrode material for high-performance supercapacitors. Journal of Energy Storage, 42. pp. 1-9. ISSN 2352-152X

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Abstract

Supercapacitors are promising energy storage devices compared to batteries due to their long cycle life and high-power density. In this work, we report a supercapacitor based on Titania supported bio-derived activated Carbon with high power density. The composite electrode material shows an initial specific capacitance of 214 F g−1 at 1 A g−1 and exhibits 92% of capacitance retention for 5000 cycles in 1 M Na2SO4 solution. The enhanced electrochemical performance is due to the synergistic effect of the electric double-layer capacitance behavior of carbon and the pseudo-capacitive nature of Titania. An energy density of 29.72 and 20 Wh kg−1 can be achieved at a power density of 499 and 4000 W kg−1, respectively. The supercapacitor based on TiO2 based intercalation compounds provides significantly high energy at the expense of power, which may be appropriate for several applications. © 2021

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IITH Creators:

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

Item Type:

Article

Additional Information:

RB is thankful to MHRD, India for providing fellowship under TEQIP-III scheme. The authors are also grateful to CSIR-NEIST Jorhat, IIT Hyderabad, and Gauhati University for the sophisticated analytical facilities. SKM acknowledges DST-IISc Energy Storage Platform on Supercapacitors and Power Dense Devices through the MECSP-2K17 program under grant no. DST/TMD/MECSP/2K17/20, Government of India for financial support to this work.

Uncontrolled Keywords:

Bio-derived carbon; Cycling stability; EDLC; Pseudocapacitance; Titania

Subjects:

Chemistry

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

06 Oct 2022 10:01

Last Modified:

06 Oct 2022 10:01