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Facile synthesis and electrochemical characterization of erbium oxide and hydroxide for supercapacitor applications.

Authors :
Elrouby, Mahmoud
Abu-Dief, Ahmed M.
Mohamed, Ibrahim M. A.
Source :
Ionics; Sep2024, Vol. 30 Issue 9, p5699-5711, 13p
Publication Year :
2024

Abstract

Novel Er-based electrodes including Er(OH)<subscript>3</subscript> or Er<subscript>2</subscript>O<subscript>3</subscript> material were introduced and synthesized via facile steps to present novel supercapacitor electrodes. Herein, the hexagonal Er(OH)<subscript>3</subscript> crystals were designed as small particles having a micro size in their diameters and nano size in their width. Additionally, the cubic Er<subscript>2</subscript>O<subscript>3</subscript> material was prepared as a clear nanoscale-size particle. The difference in the morphology in both Er-oxide and hydroxide could be due to the preparation strategy which uses traditional calcination to prepare Er<subscript>2</subscript>O<subscript>3</subscript> and the hydrothermal strategy for Er(OH)<subscript>3</subscript>. Interestingly, around 55% of the Er-oxide particles have around 14 nm, and others have a size from 3 to 22 nm. After that, the designed Er(OH)<subscript>3</subscript> or Er<subscript>2</subscript>O<subscript>3</subscript> materials were targeted as working electrodes for supercapacitor usage. Cyclic voltammetry, charge-discharge, and impedance analysis were used for such investigations. The specific capacitance (C<subscript>s</subscript>) data of the Er<subscript>2</subscript>O<subscript>3</subscript> electrode show better capacitance characteristics if compared with Er(OH)<subscript>3</subscript> electrode. At 5 mV/s, the C<subscript>s</subscript> were found at 822.99 F/g and 783.42 F/g for Er<subscript>2</subscript>O<subscript>3</subscript> and Er(OH)<subscript>3</subscript> electrodes, respectively. This enhancement was observed at low scan rates such as 0.005 V/s and high scan rates (0.08 V/s). This behavior could be due to the superior characteristics and morphology of Er<subscript>2</subscript>O<subscript>3</subscript> material to what is found in the case of Er(OH)<subscript>3</subscript>. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09477047
Volume :
30
Issue :
9
Database :
Complementary Index
Journal :
Ionics
Publication Type :
Academic Journal
Accession number :
179086216
Full Text :
https://doi.org/10.1007/s11581-024-05621-2