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Nb‐Doped Rutile TiO 2 Mesocrystals with Enhanced Lithium Storage Properties for Lithium Ion Battery
Author(s) -
Lan Tongbin,
Zhang Weifeng,
Wu NaeLih,
Wei Mingdeng
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201605115
Subject(s) - rutile , materials science , electrochemistry , lithium (medication) , chemical engineering , doping , hydrothermal circulation , conductivity , crystallization , lithium ion battery , battery (electricity) , electrode , optoelectronics , chemistry , thermodynamics , medicine , physics , engineering , endocrinology , power (physics)
A homogeneous Nb‐doped rutile TiO 2 mesocrystal material was synthesized successfully through a facile hydrothermal route. The incorporation of Nb 5+ not only promotes the crystallization of the building subunits of the rutile TiO 2 mesocrystal, but also improves the electrochemical performance at higher current rates. A capacity of 96.3 mAh g −1 at a current density as high as 40 C and an excellent long‐term cycling stability with a capacity loss of approximately 0.006 % per cycle at 5 C could be achieved when an appropriate amount of Nb 5+ was doped into rutile TiO 2 mesocrystal. The reasons for the improvement of rate capability may be attributed to the enhancement of electronic conductivity, Li‐ion diffusion kinetics, and the surface storage property for the Nb‐doped rutile TiO 2 mesocrystal.