Enhanced K-ion kinetics in a layered cathode for potassium ion batteries

A layered cathode for K-ion storage was achieved using electrochemical ion-exchange. It delivers a large specific capacity, superior rate performance and excellent cycling performance. Interestingly, it was found from the GITT results that the K ion diffusion coefficients were above 10 −12 cm 2 s −1...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2019-07, Vol.55 (55), p.791-7913
Main Authors: Zhang, Haoyang, Xi, Kaiying, Jiang, Kezhu, Zhang, Xueping, Liu, Zhaoguo, Guo, Shaohua, Zhou, Haoshen
Format: Article
Language:English
Subjects:
Batteries
Cathodes
Ion diffusion
Ion exchange
Ion storage
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Summary:A layered cathode for K-ion storage was achieved using electrochemical ion-exchange. It delivers a large specific capacity, superior rate performance and excellent cycling performance. Interestingly, it was found from the GITT results that the K ion diffusion coefficients were above 10 −12 cm 2 s −1 , comparable with that of Na-ion in the layered structure. A layered cathode for K-ion storage was achieved using electrochemical ion-exchange.
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc03156a