Molecular Design Strategy for Ordered Mesoporous Stoichiometric Metal Oxide

作者：Changyao Wang, Xiaoyue Wan, Linlin Duan, Peiyuan Zeng, Liangliang Liu, Dingyi Guo, Xia Yuan, Ahmed A. Elzatahry, Yongyao Xia, Wei Li, Dongyuan Zhao · 发表于：Angewandte Chemie International Edition · 年份：2019 · DOI：10.1002/anie.201907748 · 被引用次数：67 · 研究领域：Polyoxometalates: Synthesis and Applications、Layered Double Hydroxides Synthesis and Applications、Metal-Organic Frameworks: Synthesis and Applications

Abstract A molecular design strategy is used to construct ordered mesoporous Ti 3+ ‐doped Li 4 Ti 5 O 12 nanocrystal frameworks (OM‐Ti 3+ ‐Li 4 Ti 5 O 12 ) by the stoichiometric cationic coordination assembly process. Ti 4+ /Li + ‐citrate chelate is designed as a new molecular precursor, in which the citrate can not only stoichiometrically coordinate Ti 4+ 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‐Ti 3+ ‐Li 4 Ti 5 O 12 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.