Issue 23, 2023

New perspectives on the multianion approach to adapt electrode materials for lithium and post-lithium batteries

Abstract

Developing new and sustainable batteries is essential for modern society. Both cationic doping (e.g. transition metals) and anionic doping (F, O2−, S2−, PO43−, etc.) can be employed to improve the electrochemical behaviour of electrode materials. Herein, the anion-doping, or multianion approach, is comprehensively reviewed and investigated. It is observed that the optimized compositions of some electrode materials can involve metastable or transient states. Going beyond the inductive effect, we propose that the simultaneous use of several kinds of anions in the framework of the same host material could create a sort of energized state in the electrode material, and this could be interpreted within the “entatic state” principle which is used in coordination chemistry, catalysis, and bioinorganic chemistry. In this new hypothesis, the coordination of a cation by several anions with different properties can modify the local structure and it could enhance the electrochemical performance; this could be particularly useful for the future post-lithium batteries. The multianion approach can also be applied to electrolytes and interfaces. Finally, new theoretical calculations on multianion-based materials (carbonophosphates, thiocarbonates and Mg8Mn16O32−zFz) are reported here, highlighting the need for further research in the coordination sphere of metal–ligand systems for tuning battery properties.

Graphical abstract: New perspectives on the multianion approach to adapt electrode materials for lithium and post-lithium batteries

Article information

Article type
Perspective
Submitted
28 dec 2022
Accepted
09 máj 2023
First published
10 máj 2023

Phys. Chem. Chem. Phys., 2023,25, 15600-15623

New perspectives on the multianion approach to adapt electrode materials for lithium and post-lithium batteries

C. Pérez-Vicente and R. Alcántara, Phys. Chem. Chem. Phys., 2023, 25, 15600 DOI: 10.1039/D2CP06044B

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