Universität zu Köln

Verma, Anjneya, Kim, Kwang Ho, Mathur, Sanjay and Lee, Damin (2022). Interdependence of the electrical performance of NiCuFeCoMn multi-structure carbonates as electrode material for supercapacitors. J. Alloy. Compd., 922. LAUSANNE: ELSEVIER SCIENCE SA. ISSN 1873-4669

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Abstract

Mesoporous NiCuFeCoMn multi-structure compounds were grown as cathodes for supercapacitors using a hydrothermal method. A multi-structure electrode was constructed using a variety of nanostructures by varying the reaction time. These diverse nanostructures were highly beneficial in achieving a high electrical performance by increasing the electrode/electrolyte contact area and shortening the ion diffusion path. Optimized multi-structure arrays, which were heated for 12 h, had an excellent maximum specific capacitance of 1241 F g-1 at 3 A g-1, significantly greater than that of the other electrodes. Furthermore, the multi-structure electrode exhibited exceptional cycling stability, with 84.7% retention of the original capacitance after 5000 cycles. Moreover, an asymmetric supercapacitor with the optimized multi-structure compound as the positive electrode and graphene as the negative electrode demonstrated a high energy density of 61 W h kg-1 at a power density of 1017 W k g-1 and exceptional cycling stability by retaining 88.5% of the initial capacity after 5000 cycles. Additionally, the as-obtained asymmetric supercapacitor was capable of powering an LED light. Thus, in terms of electrical performance, the asymmetric supercapacitor fabricated with the NiCuFeCoMn multi-structure compounds outperformed the majority of previously reported transition-metal-based carbonate hydroxide asymmetric supercapacitors. (c) 2022 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Verma, Anjneya UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Kwang Ho UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED Lee, Damin UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-678484
DOI:	10.1016/j.jallcom.2022.166222
Journal or Publication Title:	J. Alloy. Compd.
Volume:	922
Date:	2022
Publisher:	ELSEVIER SCIENCE SA
Place of Publication:	LAUSANNE
ISSN:	1873-4669
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LAYERED DOUBLE HYDROXIDE; ASYMMETRIC SUPERCAPACITORS; CUCO2O4 NANOSHEETS; GRAPHENE SHEETS; NANOWIRE ARRAYS; POROUS NIO; NICKEL; GROWTH; FILMS; COMPOSITES Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67848