Issue 21, 2022

High rate capability achieved by reducing the miscibility gap of Na4−xMnV(PO4)3

Abstract

NASICON structured Na4MnV(PO4)3 has attracted great interest as a promising cathode for sodium-ion batteries due to its high theoretical capacity and working potential. However, it suffers from poor cycling stability and rate capability that originate from multi-phase transformations during sodiation/desodiation. In this work, the effect of synthesis conditions on the structural evolution, the reaction mechanism and the phase evolution of such electrode materials during sodiation/desodiation was investigated. The results indicate that the reaction mechanism depends on the grain size of Na4MnV(PO4)3. Specifically, reducing the grain size allows for an expanded solid solution region, which considerably improves the cycling stability and rate capability. Tuning the grain size can therefore improve the structural stability and kinetics of Na4MnV(PO4)3.

Graphical abstract: High rate capability achieved by reducing the miscibility gap of Na4−xMnV(PO4)3

Supplementary files

Article information

Article type
Research Article
Submitted
20 七月 2022
Accepted
26 八月 2022
First published
26 八月 2022

Inorg. Chem. Front., 2022,9, 5454-5462

High rate capability achieved by reducing the miscibility gap of Na4−xMnV(PO4)3

A. Tang, W. Lin, D. Xiao, C. Shang, M. Yan, Z. Zhang, K. Aifantis and P. Hu, Inorg. Chem. Front., 2022, 9, 5454 DOI: 10.1039/D2QI01568D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements