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

Haoyang Zhang; Kaiying Xi; Kezhu Jiang; Xueping Zhang; Zhaoguo Liu; Shaohua Guo; Haoshen Zhou

doi:10.1039/c9cc03156a

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

Chem Commun (Camb). 2019 Jul 4;55(55):7910-7913. doi: 10.1039/c9cc03156a.

Authors

Haoyang Zhang¹, Kaiying Xi, Kezhu Jiang, Xueping Zhang, Zhaoguo Liu, Shaohua Guo, Haoshen Zhou

Affiliation

¹ Center of Energy Storage Materials & Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China. shguo@nju.edu.cn hszhou@nju.edu.cn.

PMID: 31184657
DOI: 10.1039/c9cc03156a

Abstract

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 cm2 s-1, comparable with that of Na-ion in the layered structure.