Controlled hydroxy-fluorination reaction of anatase to promote Mg2+ mobility in rechargeable magnesium batteries

Jiwei Ma; Toshinari Koketsu; Benjamin. J. Morgan; Christophe Legein; Monique Body; Peter Strasser; Damien Dambournet

doi:10.1039/C8CC04136A

Controlled hydroxy-fluorination reaction of anatase to promote Mg²⁺ mobility in rechargeable magnesium batteries†‡

Jiwei Ma,

§^ab Toshinari Koketsu,§^c Benjamin. J. Morgan,

^de Christophe Legein,

^f Monique Body,

^f Peter Strasser

^c and Damien Dambournet

*^ag

Author affiliations

* Corresponding authors

^a Sorbonne Université, CNRS, Physico-chimie des électrolytes et nano-systèmes interfaciaux, PHENIX, Paris F-75005, France
E-mail: damien.dambournet@sorbonne-universite.fr

^b Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China

^c The Electrochemical Energy, Catalysis, and Materials Science Laboratory, Department of Chemistry, Technical University Berlin, Berlin 10623, Germany

^d Department of Chemistry, University of Bath, Bath BA2 7AY, UK

^e The Faraday Institution, Quad One, Harwell Science and Innovation Campus, Didcot, UK

^f Institut des Molécules et Matériaux du Mans (IMMM) – UMR 6283 CNRS, Le Mans Université, Avenue Olivier Messiaen, Le Mans 72085, Cedex 9, France

^g Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, Amiens 80039, France

Abstract

In anatase TiO₂, substituting oxide anions with singly charged (F,OH) anions allows the controlled formation of cation vacancies, which act as reversible intercalation sites for Mg²⁺. We show that ion-transport (diffusion coefficients) and intercalation (reversible capacity) properties are controlled by two critical parameters: the vacancy concentration and the local anionic environment. Our results emphasise the complexity of this behaviour, and highlight the potential benefits of chemically controlling cationic-defects in electrode materials for rechargeable multivalent-ion batteries.

This article is part of the themed collection: Fluorine Chemistry

Supplementary files

Article information

DOI: https://doi.org/10.1039/C8CC04136A
Article type: Communication
Submitted: 24 Mei 2018
Accepted: 13 Ago 2018
First published: 13 Ago 2018

Download Citation

Chem. Commun., 2018,54, 10080-10083

Permissions

Request permissions

Controlled hydroxy-fluorination reaction of anatase to promote Mg²⁺ mobility in rechargeable magnesium batteries

J. Ma, T. Koketsu, Benjamin. J. Morgan, C. Legein, M. Body, P. Strasser and D. Dambournet, Chem. Commun., 2018, 54, 10080 DOI: 10.1039/C8CC04136A

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.

Chemical Communications