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Oxygen‐Deficient Blue TiO 2 for Ultrastable and Fast Lithium Storage
Author(s) -
Hao Zhongkai,
Chen Qi,
Dai Wenrui,
Ren Yinjuan,
Zhou Yin,
Yang Jinlin,
Xie Sijie,
Shen Yanbin,
Wu Jihong,
Chen Wei,
Xu Guo Qin
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201903107
Subject(s) - materials science , oxygen , anode , nanoparticle , energy storage , electrode , titanium dioxide , lithium (medication) , oxygen evolution , chemical engineering , nanotechnology , water splitting , diffusion , electrochemistry , catalysis , photocatalysis , composite material , chemistry , medicine , organic chemistry , endocrinology , engineering , power (physics) , physics , biochemistry , quantum mechanics , thermodynamics
Developing a titanium dioxide (TiO 2 )‐based anode with superior high‐rate capability and long‐term cycling stability is important for efficient energy storage. Herein, a simple one‐step approach for fabricating blue TiO 2 nanoparticles with oxygen vacancies is reported. Oxygen vacancies can enlarge lattice spaces, lower charge transfer resistance, and provide more active sites in TiO 2 lattices. As a result, this blue TiO 2 electrode exhibits a highly reversible capacity of 50 mAh g −1 at 100 C (16 800 mA g −1 ) even after 10 000 cycles, which is attributable to the combination of surface capacitive process and remarkable diffusion‐controlled insertion revealed by the kinetic analysis. The strategy of employing oxygen‐deficient nanoparticles may be extended to the design of other robust semiconductor materials as electrodes for energy storage.