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Controlled hydroxy-fluorination reaction of anatase to promote Mg 2+ mobility in rechargeable magnesium batteries

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.
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Submitted on : Tuesday, October 16, 2018 - 3:22:21 PM
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Jiwei Ma, Toshinari Koketsu, Benjamin Morgan, Christophe Legein, Monique Body, et al.. Controlled hydroxy-fluorination reaction of anatase to promote Mg 2+ mobility in rechargeable magnesium batteries. Chemical Communications, Royal Society of Chemistry, 2018, 54 (72), pp.10080 - 10083. ⟨10.1039/C8CC04136A⟩. ⟨hal-01896864⟩

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