化学计量学
介孔材料
结晶
材料科学
氧化物
纳米晶
化学工程
纳米技术
阳离子聚合
化学
高分子化学
物理化学
催化作用
有机化学
冶金
工程类
作者
Changyao Wang,Xiaoyue Wan,Linlin Duan,Peiyuan Zeng,Liangliang Liu,Dingyi Guo,Yuan Xia,Ahmed A. Elzatahry,Yongyao Xia,Wei Li,Dongyuan Zhao
标识
DOI:10.1002/anie.201907748
摘要
A molecular design strategy is used to construct ordered mesoporous Ti3+ -doped Li4 Ti5 O12 nanocrystal frameworks (OM-Ti3+ -Li4 Ti5 O12 ) by the stoichiometric cationic coordination assembly process. Ti4+ /Li+ -citrate chelate is designed as a new molecular precursor, in which the citrate can not only stoichiometrically coordinate Ti4+ with Li+ homogeneously at the atomic scale, but also interact strongly with the PEO segments in the Pluronic F127. These features make the co-assembly and crystallization process more controllable, thus benefiting for the formation of the ordered mesostructures. The resultant OM-Ti3+ -Li4 Ti5 O12 shows excellent rate (143 mAh g-1 at 30 C) and cycling performances (<0.005 % fading per cycle). This work could open a facile avenue to constructing stoichiometric ordered mesoporous oxides or minerals with highly crystalline frameworks.
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