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Unique Ordered TiO 2 Superstructures with Tunable Morphology and Crystalline Phase for Improved Lithium Storage Properties
Author(s) -
Hong Zhensheng,
Xu Yuxia,
Liu Yubin,
Wei Mingdeng
Publication year - 2012
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.201200515
Subject(s) - materials science , anatase , rutile , nanorod , chemical engineering , lithium (medication) , phase (matter) , nanotechnology , microporous material , morphology (biology) , photocatalysis , chemistry , composite material , organic chemistry , endocrinology , biology , engineering , genetics , catalysis , medicine , biochemistry
Unique ordered TiO 2 superstructures with tunable morphology and crystalline phase were successfully prepared by the use of different counterions. Dumbbell‐shaped rutile TiO 2 and nanorod‐like rutile mesocrystals constructed from ultrathin nanowires, and quasi‐octahedral anatase TiO 2 mesocrystals built from tiny nanoparticle subunits were achieved. Interestingly, the obtained anatase mesocrystals have a fine microporous structure and a large surface area. The influence of the counterions in the reaction system is discussed and possible mechanisms responsible for the formation of the unique ordered TiO 2 superstructures with different morphologies and crystalline phases are also proposed based on a series of experimental results. The obtained TiO 2 superstructures were used as anode materials in lithium ion batteries, and exhibited higher capacity and improved rate performance; this is attributed to the intrinsic characteristics of the mesoscopic TiO 2 superstructures, which have a single‐crystal‐like and porous nature.