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Electrochemical performance of cobalt hydroxide nanosheets formed by the delamination of layered cobalt hydroxide in water

SYSNO ASEP	0429046
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Electrochemical performance of cobalt hydroxide nanosheets formed by the delamination of layered cobalt hydroxide in water
Tvůrce(i)	Schneiderová, Barbora (UACH-T)_SAI Demel, Jan (UACH-T)_{SAI, RID, ORCID} Pleštil, Josef (UMCH-V)_RID Tarábková, Hana (UFCH-W)_{RID, ORCID} Bohuslav, Jan (UFCH-W) Lang, Kamil (UACH-T)_{SAI, RID, ORCID}
Zdroj.dok.	Dalton Transactions. - : Royal Society of Chemistry - ISSN 1477-9226 Roč. 43, č. 27 (2014), s. 10484-10491
Poč.str.	8 s.
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	Ray-absorption spectroscopy ; Alpha-cobalt ; Solvothermal decomposition ; Nickel ; Nanocomposites
Vědní obor RIV	CA - Anorganická chemie
Vědní obor RIV – spolupráce	Ústav makromolekulární chemie - Makromolekulární chemie
CEP	GP13-09462P GA ČR - Grantová agentura ČR
Institucionální podpora	UACH-T - RVO:61388980 ; UFCH-W - RVO:61388955 ; UMCH-V - RVO:61389013
UT WOS	000338117200020
EID SCOPUS	84902665765
DOI	10.1039/C4DT00141A
Anotace	We report the preparation of monometallic Co2+/Co3+ layered double hydroxide, intercalated with lactate anions (LCoH-Lactate), and its spontaneous delamination in water to form cobalt hydroxide nanosheets. These hydroxide nanosheets formed stable aqueous dispersions. The thickness of a nanosheet was estimated to be approximately 1 nm by atomic force microscopy and small angle X-ray scattering experiments, and corresponds to a single hydroxide layer. Some of the Co2+ cations were oxidised by oxygen, resulting in a mixed Co2+0.76Co3+0.24 layer composition. Upon water evaporation, the nanosheets restacked to form transparent self-standing films with a layered structure like that of the original material. The coverage of the surface with side-by-side stacks of nanosheets indicated two-dimensional agglomeration and suggested that these dispersions could be applied to prepare large monolayers of nanosheets. The layers prepared by spin-coating were stable and featured reversible and reproducible redox properties in an alkaline electrolyte. In an evaluation of their electrochemical performance, the cobalt hydroxide nanosheets exhibited durability and fast charge transfer kinetics during repetitive potential cycling up to 200 mV s−1. The nanosheets prepared by the present method show promise for use in nanocomposite materials for energy storage applications.
Pracoviště	Ústav anorganické chemie
Kontakt	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Rok sběru	2015

Počet záznamů: 1