A novel Mn-based P2/tunnel/O3' tri-phase composite cathode with enhanced sodium storage properties

Dong Wang; Yihua Liu; Zhenguo Wu; Xiaohong Liu; Jie Qu; Hao Liu; Yong Ming; Yanjun Zhong; Benhe Zhong; Xiaodong Guo

doi:10.1039/c9cc09316h

A novel Mn-based P2/tunnel/O3' tri-phase composite cathode with enhanced sodium storage properties

Chem Commun (Camb). 2020 Mar 5;56(19):2921-2924. doi: 10.1039/c9cc09316h.

Authors

Dong Wang¹, Yihua Liu¹, Zhenguo Wu¹, Xiaohong Liu¹, Jie Qu¹, Hao Liu¹, Yong Ming¹, Yanjun Zhong¹, Benhe Zhong¹, Xiaodong Guo²

Affiliations

¹ College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China. zhenguowu@scu.edu.cn.
² College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China. zhenguowu@scu.edu.cn and Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia.

PMID: 32037433
DOI: 10.1039/c9cc09316h

Abstract

A novel P2/tunnel/O3' composite Na0.7Bi0.01MnO2 cathode is developed via the Na+-site modification of Bi3+ in layer structure Na0.7MnO2 for the first time. Superior electrochemical performance with a high capacity retention of ∼86.5% after 300 cycles at 2C is obtained. Moreover, the tri-phase structure can also serve as a model material, which intuitively evidences the environmental structural stability order: tunnel > P2 > O3'.