FeOOH Nanocubes Anchored on Carbon Ribbons for Use in Li/O2 Batteries.
Chemistry
; 25(12): 3112-3118, 2019 Feb 26.
Article
em En
| MEDLINE
| ID: mdl-30618062
ABSTRACT
A composite of FeOOH nanocubes anchored on carbon ribbons has been synthesized and used as a cathode material for Li/O2 batteries. Fe2+ ion-exchanged resin serves as a precursor for both FeOOH nanocubes and carbon ribbons, which are formed simultaneously. The as-prepared FeOOH cubes are proposed to have a core-shell structure, with FeOOH as the shell and Prussian blue as the core, based on information from XPS, TEM, and EDS mapping. As a cathode material for Li/O2 batteries, FeOOH delivers a specific capacity of 14816â
mA h g-1 cathode with a cycling stability of 67 cycles over 400â
h. The high performance is related to the low overpotential of the oxygen reduction/evolution reaction on FeOOH. The cube structure, the supporting carbon ribbons, and the -OOH moieties all contribute to the low overpotential. The discharge product Li2 O2 can be efficiently decomposed in the FeOOH cathode after a charging process, leading to higher cycling stability. Its high activity and stability make FeOOH a good candidate for use in non-aqueous Li/O2 batteries.
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MEDLINE
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En
Ano de publicação:
2019
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Article