In situ electrochemical Mn vacancies in CoMnHCF for a high level of zinc storage

CoMnHCF is utilized in aqueous sodium/zinc mixed ion batteries and exhibits a high reversible capacity with good rate and cycle performances. At 0.05 A g current density, the CoMnHCF can deliver a specific capacity for 180.4 mA h g , and have 99.3% capacity retention after 300 cycles at 0.3 A g . Su...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2024-04, Vol.60 (30), p.4080-4083
Main Authors: Wang, Dan, Zhou, Ziyue, Ma, Tengfei, Zhang, Jinhua, Zhang, Yunhe, Ma, Rui, Zhang, Dapeng, Yan, Tingjiang
Format: Article
Language:English
Subjects:
Electrochemical analysis
Redox reactions
Sodium
Zinc
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Summary:CoMnHCF is utilized in aqueous sodium/zinc mixed ion batteries and exhibits a high reversible capacity with good rate and cycle performances. At 0.05 A g current density, the CoMnHCF can deliver a specific capacity for 180.4 mA h g , and have 99.3% capacity retention after 300 cycles at 0.3 A g . Such high reversible capacity profits from Mn vacancies that generate during the first cycle, which provides more active sites for Zn storage. The de-intercalation of Na further elevates this good electrochemical performance. Co atoms in the framework are not only involved in the redox reactions, but help to support the structure, thus achieving better cycle stabilities.
ISSN:1359-7345
1364-548X
DOI:10.1039/d4cc00454j