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

被引：15

作者：

Ma, Jiwei ^{[1
,2
]}

Koketsu, Toshinari ^{[3
]}

Morgan, Benjamin. J. ^{[4
,5
]}

Legein, Christophe ^{[6
]}

Body, Monique ^{[6
]}

Strasser, Peter ^{[3
]}

Dambournet, Damien ^{[1
,7
]}

机构：

[1] Sorbonne Univ, CNRS, PHENIX, Physicochim Electrolytes & Nanosyst Interfaciaux, F-75005 Paris, France

[2] Tongji Univ, Sch Mat Sci & Engn, Inst New Energy Vehicles, Shanghai 201804, Peoples R China

[3] Tech Univ Berlin, Electrochem Energy Catalysis & Mat Sci Lab, Dept Chem, D-10623 Berlin, Germany

[4] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England

[5] Faraday Inst, Quad One,Harwell Sci & Innovation Campus, Didcot, Oxon, England

[6] Le Mans Univ, CNRS, IMMM, UMR 6283, Ave Olivier Messiaen, F-72085 Le Mans 9, France

[7] CNRS, Reseau Stockage Electrochim Energie RS2E, FR 3459, F-80039 Amiens, France

来源：

CHEMICAL COMMUNICATIONS | 2018年 / 54卷 / 72期

基金：

英国工程与自然科学研究理事会;

关键词：

SOL-GEL CHEMISTRY; METAL FLUORIDES; HYDROXYFLUORINATED ANATASE; CATHODE MATERIALS; DIFFUSION; IONS; INTERCALATION; INSERTION; INSIGHTS;

D O I：

10.1039/c8cc04136a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：10080 / 10083

页数：4

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