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

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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′.

Graphical abstract: A novel Mn-based P2/tunnel/O3′ tri-phase composite cathode with enhanced sodium storage properties

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Article information


Submitted
29 Nov 2019
Accepted
29 Jan 2020
First published
10 Feb 2020

Chem. Commun., 2020, Advance Article
Article type
Communication

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

D. Wang, Y. Liu, Z. Wu, X. Liu, J. Qu, H. Liu, Y. Ming, Y. Zhong, B. Zhong and X. Guo, Chem. Commun., 2020, Advance Article , DOI: 10.1039/C9CC09316H

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