Universität zu Köln

Lee, Damin, Kim, Kyung Su, Yun, Je Moon, Yoon, Seog-Young, Mathur, Sanjay ORCID: 0000-0003-2765-2693, Shin, Heon-Cheol and Kim, Kwang Ho (2019). Synergistic effects of dual nano-type electrode of NiCo-nanowire/NiMn-nanosheet for high-energy supercapacitors. J. Alloy. Compd., 789. S. 119 - 129. LAUSANNE: ELSEVIER SCIENCE SA. ISSN 1873-4669

Full text not available from this repository.

Abstract

A unique three-dimensional hybrid NiCo(CO3)(OH)(2) nanowire/NiMn(CO3)(OH)(2) nanosheet composite was fabricated using a facile hydrothermal method as a binder-free electrode directly grown on Ni foam for supercapacitors. We examined the synergistic effect by fabricating Ni-Co-Mn ternary electrodes that used Ni-Co with a large specific surface area and Mn with a very high theoretical capacity. The new hybrid electrode had good electrochemical characteristics, exhibiting remarkably high specific capacitances of 1673.3 and 453.0 Fg(-1) at 3 and 15 Ag-1, respectively. Compared with other samples, the capacitance showed less reduction as the current density increased. This result indicates stable electrode properties with increasing voltage. The cycling stability of the hybrid NiCo(CO3)(OH)(2)/NiMn(CO3)(OH)(2) composite was measured as 82.1% after 5000 cycles. Additionally, we fabricated an asymmetric supercapacitor employing the NiCo(CO3)(OH)(2)/NiMn(CO3)(OH)(2) composite as the positive electrode and graphene as the negative electrode, which exhibited a high energy density of 27.2 W h kg(-1) at a power density of 702.7 W kg(-1) and a remarkable cycling stability, with 89.4% capacitance retention after 5000 cycles. Thus, for the first time, we investigated the dual nano-type structure of an NiCo(CO3)(OH)(2) nanowire/NiMn(CO3)(OH)(2) nanosheet electrode for supercapacitors and obtained satisfactory results. (C) 2019 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lee, Damin UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Kyung Su UNSPECIFIED UNSPECIFIED UNSPECIFIED Yun, Je Moon UNSPECIFIED UNSPECIFIED UNSPECIFIED Yoon, Seog-Young UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED Shin, Heon-Cheol UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Kwang Ho UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-137769
DOI:	10.1016/j.jallcom.2019.02.267
Journal or Publication Title:	J. Alloy. Compd.
Volume:	789
Page Range:	S. 119 - 129
Date:	2019
Publisher:	ELSEVIER SCIENCE SA
Place of Publication:	LAUSANNE
ISSN:	1873-4669
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FACILE SYNTHESIS; NICKEL FOAM; PERFORMANCE; GRAPHENE; COMPOSITES; CARBON; CAPACITANCE; HYDROXIDE; ARRAYS; NANOSTRUCTURES Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13776