首页|Micelle-directed self-assembly of single-crystal-like mesoporous stoichiometric oxides for high-performance lithium storage

Micelle-directed self-assembly of single-crystal-like mesoporous stoichiometric oxides for high-performance lithium storage

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Due to their uncontrollable assembly and crystallization process,the synthesis of mesoporous metal oxide single crystals remains a formidable challenge.Herein,we report the synthesis of single-crystal-like mesoporous Li2TiSiOs by using soft micelles as templates.The key lies in the atomic-scale self-assembly and step-crystallization processes,which ensure the formation of single-crystal-like mesoporous Li2TiSiO5 microparticles via an oriented attachment growth mechanism under the confinement of an in-situ formed carbon matrix.The mesoporous Li2TiSiO5 anode achieves a superior rate capability(148 mAh g-1 at 5.0 A g-1)and outstanding long-term cycling stability(138 mAh g-1 after 3000 cycles at 2.0 A g-1)for lithium storage as a result of the ultrafast Li+diffusion caused by penetrating mesochannels and nanosized crystal frameworks(5-10 nm).In comparison,bulk Li2TiSiO5 exhibits poor rate capability and cycle performance due to micron-scale diffusion lengths.This method is very simple and reproducible,heralding a new way of designing and synthesizing mesoporous single crystals with controllable frameworks and chemical functionalities.

mesoporous materialsmicellessingle-crystal-likeLi2TiSiO5lithium-ion batteries

Yanhua Wan、Changyao Wang、Xingmiao Zhang、Yang Yin、Mengmeng Liu、Bing Ma、Linlin Duan、Yuzhu Ma、Wei Zhang、Changlin Zheng、Dongliang Chao、Fei Wang、Yongyao Xia、Wei Li

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Department of Chemistry,Laboratory of Advanced Materials,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,State Key Laboratory of Molecular Engineering of Polymers,College of Chemistry and Materials Science,Fudan University,Shanghai 200433,China

State Key Laboratory of Surface Physics and Department of Physics,Fudan University,Shanghai 200433,China

国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金Program of Shanghai Academic Research LeaderShanghai Pilot Program for Basic Research-Fudan UniversityShanghai Pilot Program for Basic Research-Fudan UniversityShanghai International Science and Technology Partnership Project

2022YFA15035012022YFA15041032208810162171136U21A2032921XD142080021TQ140010021TQ00823520750400

2024

10.1093/nsr/nwae054

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年,卷(期)：2024.11(4)
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