Molecular Design Strategy for Ordered Mesoporous Stoichiometric Metal Oxide

Molecular Design Strategy for Ordered Mesoporous Stoichiometric Metal Oxide

A molecular design strategy is used to construct ordered mesoporous Ti3+‐doped Li4Ti5O12 nanocrystal frameworks (OM‐Ti3+‐Li4Ti5O12) 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 stoic...

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Veröffentlicht in:Angewandte Chemie International Edition 2019-10, Vol.58 (44), p.15863-15868
Hauptverfasser: Wang, Changyao, Wan, Xiaoyue, Duan, Linlin, Zeng, Peiyuan, Liu, Liangliang, Guo, Dingyi, Xia, Yuan, Elzatahry, Ahmed A., Xia, Yongyao, Li, Wei, Zhao, Dongyuan
Format: Artikel
Sprache:eng
Schlagworte:
Assembly
Chelates
Citric acid
co-assembly
Crystallization
Li4Ti5O12
lithium ion batteries
mesoporous materials
Minerals
Nanocrystals
Oxides
Poloxamers
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Zusammenfassung:A molecular design strategy is used to construct ordered mesoporous Ti3+‐doped Li4Ti5O12 nanocrystal frameworks (OM‐Ti3+‐Li4Ti5O12) 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+‐Li4Ti5O12 shows excellent rate (143 mAh g−1 at 30 C) and cycling performances (
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201907748