2021
DOI: 10.1002/er.7501
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Ion‐exchange synthesis of microporous Co 3 S 4 for enhanced electrochemical energy storage

Abstract: Replacing oxygen in an oxide-based material with sulfur can produce improved flexibility and more efficient electron transport in its structure leading to enhanced electrical performance. Herein, facile template-free growth of free-standing cobalt (II, III) oxide (Co 3 O 4 ) on Ni foam via a mild hydrothermal technique followed by its transformation to cobalt (II, III) sulfide (Co 3 S 4 ) via an ion-exchange is reported. The microstructural morphology, phase, and porosity of the prepared Co 3 O 4 and Co 3 S 4 … Show more

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Cited by 21 publications
(5 citation statements)
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“…The reaction mechanism of the Ni 3 S 4 @Co 3 S 4 electrode is as follows. 48,49 Ni 3 S 4 + OH − ⇌ Ni 3 S 4 (OH) + e − Ni 3 S 4 (OH) + OH − ⇌ Ni 3 S 4 O + H 2 O + e − Co 3 S 4 + OH − ⇌ Co 3 S 4 (OH) + e − Co 3 S 4 (OH) + OH − ⇌ Co 3 S 4 O + H 2 O + e − …”
Section: Resultsunclassified
“…The reaction mechanism of the Ni 3 S 4 @Co 3 S 4 electrode is as follows. 48,49 Ni 3 S 4 + OH − ⇌ Ni 3 S 4 (OH) + e − Ni 3 S 4 (OH) + OH − ⇌ Ni 3 S 4 O + H 2 O + e − Co 3 S 4 + OH − ⇌ Co 3 S 4 (OH) + e − Co 3 S 4 (OH) + OH − ⇌ Co 3 S 4 O + H 2 O + e − …”
Section: Resultsunclassified
“…3f, the asymmetric peaks at 163.5 eV and 162.1 eV are assigned to S 2p 1/2 and S 2p 3/2 , respectively. 34 The peak at 166.0 eV is also characteristic of the typical metal–sulphur bond (M–S). 43 This indicates that the metal does react with sulphur during surface vulcanization, which is also consistent with the results of the Co 2p spectrum.…”
Section: Resultsmentioning
confidence: 99%
“…7(a), with a binding energy of 163.3 and 164.4 eV corresponding to Cu 2 S 48,49 and Co 3 S 4 (ref. 50 and 51) respectively. The peak at 168.1 eV can be assigned to sulfates (SO 4 2− , SO 3 2− , and S 2 O 3 2− ), 48,52 which are formed because of oxidation reactions caused by the high potential between sulfides and O 2 .…”
Section: Resultsmentioning
confidence: 99%