Co2(OH)3Cl xerogels with 3D interconnected mesoporous structures as a novel high-performance supercapacitor material

Ranganatha, S and Kumar, Surender and Penki, Tirupathi Rao and Kishore, Brij and Munichandraiah, N (2017) Co2(OH)3Cl xerogels with 3D interconnected mesoporous structures as a novel high-performance supercapacitor material. In: Journal of Solid State Electrochemistry, 21 (1). pp. 133-143. ISSN 1432-8488

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Abstract

Co2(OH)3Cl xerogel interconnected mesoporous structures have been prepared by a facile one pot sol-gel process and heat treated at 200 and 400 °C. All samples are studied for their morphology, structure, and electrochemical stability upon cycling. The specific capacitance of the as-prepared Co2(OH)3Cl from single electrode study is 450 F/g, when the electrodes are cycled in 3 M KOH at a specific current 2 A/g. Interestingly, capacity retention after 500 and 1000 cycles is about 92 and 75 %, respectively. Sample heated at 200 °C exhibits 308 F/g at 2 A/g and that heated at 400 °C shows only 32 F/g at 0.2 A/g. With an increase in preparation temperature, amorphous Co2(OH)3Cl is converted to crystalline Co3O4 phases with lower electrochemical performance. In full cell study, as-prepared Co2(OH)3Cl showed a capacity of about 49 F/g as asymmetric capacitor and 32 F/g as symmetric capacitor at 2 A/g current density. Co2(OH)3Cl being a novel porous material with merits of homogeneous porosity, high surface area, and an interconnected three dimensional (3D) structure exhibits considerably high capacitance. With a significant specific capacity and electrochemical stability, the synthesized material is a novel potential candidate for supercapacitors. [Figure not available: see fulltext.]

Item Type:	Journal Article
Publication:	Journal of Solid State Electrochemistry
Publisher:	Springer New York LLC
Additional Information:	The copyright of this article belongs to the Springer New York LLC.
Keywords:	Cobalt hydroxychlorides; Mesoporous; Sol-gel; Supercapacitors; Xerogel
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	26 May 2022 09:19
Last Modified:	26 May 2022 09:19
URI:	https://eprints.iisc.ac.in/id/eprint/72683

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