Oxygen Vacancy Engineering in Titanium Dioxide for Sodium Storage |
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| Authors: | Qi Wang Shan Zhang Hanna He Chunlin Xie Prof. Yougen Tang Prof. Chuanxin He Prof. Minhua Shao Prof. Haiyan Wang |
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| Affiliation: | 1. Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 P. R. China;2. Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 P. R. China These authors contributed equally to this study.;3. State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065 P. R. China;4. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060 P. R. China;5. Department of Chemical and Biological Engineering, Energy Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, P. R. China |
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| Abstract: | Titanium dioxide (TiO2) is a promising anode material for sodium-ion batteries (SIBs) due to its low cost, natural abundance, nontoxicity, and excellent electrochemical stability. Oxygen vacancies, the most common point defects in TiO2, can dramatically influence the physical and chemical properties of TiO2, including band structure, crystal structure and adsorption properties. Recent studies have demonstrated that oxygen-deficient TiO2 can significantly enhance sodium storage performance. Considering the importance of oxygen vacancies in modifying the properties of TiO2, the structural properties, common synthesis strategies, characterization techniques, as well as the contribution of oxygen-deficient TiO2 on initial Coulombic efficiency, cyclic stability, rate performance for sodium storage are comprehensively described in this review. Finally, some perspectives on the challenge and future opportunities for the development of oxygen-deficient TiO2 are proposed. |
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| Keywords: | defects oxygen vacancy TiO2 electrochemical energy storage sodium-ion batteries |
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