AI Article Synopsis
- - This study investigates how KCoF stores charge in 1 M NaSO aqueous electrolytes using various techniques, particularly the electrochemical quartz crystal microbalance (EQCM).
- - During the charging phase, cobalt compounds undergo multiple transformations, involving oxidation and proton extraction, leading to different forms like amorphous CoOOH and CoO.
- - The discharge phase features the insertion of hydrogen into cobalt compounds, facilitating further transformations and providing insights for advancements in aqueous energy storage technologies.
Article Abstract
This study is an in-depth exploration of the charge storage mechanisms of KCoF in 1 M NaSO mild aqueous electrolytes an array of / physicochemical/electrochemical methods, especially the electrochemical quartz crystal microbalance (EQCM) technique, showing a combination of conversion, insertion/extraction and adsorption mechanisms. Specifically, during the first charge phase, Co(OH) is formed/oxidized into amorphous CoOOH and CoO, and then CoOOH undergoes partial proton extraction to yield CoO, which is simultaneously accompanied by the transformation of CoO into CoOOH and (hydrated) CoO. During the first discharge process, the partial insertion of H into (hydrated) CoO leads to the formation of CoOOH and CoO, with the conversion of CoO into CoOOH and both CoO and CoOOH undergoing further transformations into (hydrated) Co(OH) the insertion of H. This work offers valuable references for the development of aqueous energy storage.
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| http://dx.doi.org/10.1039/d4nr02522a | DOI Listing |
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