title: Hydrogenated Oxygen-Deficient Blue Anatase as Anode for High-Performance Lithium Batteries.
abstract: Blue oxygen-deficient nanoparticles of anatase TiO2 (H-TiO2) are synthesized using a modified hydrogenation process. Scanning electron microscope and transmission electron microscope images clearly demonstrate the evident change of the TiO2 morphology, from 60 nm rectangular nanosheets to much smaller round or oval nanoparticles of ∼17 nm, after this hydrogenation treatment. Importantly, electron paramagnetic resonance and positronium annihilation lifetime spectroscopy confirm that plentiful oxygen vacancies accompanied by Ti(3+) are created in the hydrogenated samples with a controllable concentration by altering hydrogenation temperature. Experiments and theory calculations demonstrate that the well-balanced Li(+)/e(-) transportation from a synergetic effect between Ti(3+)/oxygen vacancy and reduced size promises the optimal H-TiO2 sample a high specific capacity, as well as greatly enhanced cycling stability and rate performance in comparison with the other TiO2.
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, P. R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zheng
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, P. R. China.
authors.forename: Yousong
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 210016, P. R. China.
authors.forename: Guangbin
authors.initials: G
authors.lastname: Ji
authors.affiliation: Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, P. R. China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, P. R. China.
authors.forename: Xingzhong
authors.initials: X
authors.lastname: Cao
authors.affiliation: Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, P. R. China.
authors.forename: Baoyi
authors.initials: B
authors.lastname: Wang
authors.affiliation: State Key Lab of Polymer Materials Engineering, Polymer Research Institute, Sichuan University , Chengdu 610065, P. R. China.
authors.forename: Chuhong
authors.initials: C
authors.lastname: Zhang
authors.affiliation: College of Science, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Xuguang
authors.initials: X
authors.lastname: Zhou
authors.affiliation: College of Science, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: College of Science, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Daning
authors.initials: D
authors.lastname: Shi
keywords: Li-storage performance; anatase TiO2; hydrogenation treatment; oxygen vacancy dependence; synergetic effect