Anion-controlled synthesis of TiO2 nano-aggregates for Li ion battery electrodes

Title
Anion-controlled synthesis of TiO2 nano-aggregates for Li ion battery electrodes
Authors
박상백송희조김재찬노희석이찬우김동완홍국선
Issue Date
2014-10
Publisher
Materials characterization
Citation
VOL 96-20
Abstract
Nano-sized anatase TiO2 was synthesized using surfactant-free hydrolysis method by controlling the ratio of anions in solution. The particle sizes of TiO2 were systematically tuned by the molar ratio of the Ti4+ precursors (chlorides and sulfates). Each TiO2 particle consists of an aggregation of 5 nm primary crystallites, resulting in a large specific surface area. TiO2 nano-aggregates (TiO2 NAs) which were 50 nm in size exhibited the best cycle stability. After calcination, the capacity of the TiO2 NA was enhanced to 171 mAh g(-1) at 100 cycles at a rate of 0.2 C due to the removal of impediments such as a hydroxyl group and physisorbed water, indicating that more than 0.5 Li was inserted into TiO2 at 100 cycles, and that these NAs had good rate capability at high current densities
URI
http://pubs.kist.re.kr/handle/201004/71234
ISSN
1044-5803
Appears in Collections:
KIST Publication > Article
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