Статья

Engineering Molecular Polymerization for Template‐Free SiO<i><sub>x</sub></i>/C Hollow Spheres as Ultrastable Anodes in Lithium‐Ion Batteries

Xiaoming ZhouMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaYang LiuMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaYang RenMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaTiansheng MuMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaXucai YinMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaChunyu DuMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaHua HuoMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaXinqun ChengMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaPengjian ZuoMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. ChinaGeping YinMIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage and Institute of Advanced Chemical Power Sources School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. China

2021en

ABI

Аннотация

Abstract SiO x /C composites with a void‐reserving structure are promising anodes for lithium‐ion batteries. However, the facile and controllable synthesis of uniformly dispersed SiO x and carbon components, simultaneously incorporating ample voids, still remains a great challenge. Herein, a molecular polymerization strategy is devised to construct SiO x /C hollow particles for lithium‐ion batteries. 3‐aminopropyltriethoxysilane and dialdehyde molecules are judiciously engineered as silicon and carbon precursors to produce the polymer hollow spheres (PHSs) through a one‐step aldimine condensation without any template and additive. A range of PHSs is obtained using terephthalaldehyde, glutaraldehyde, and glyoxal as the crosslinkers, demonstrating the high tunability of the strategy. Importantly, in situ pyrolysis of the PHSs warrants the homogeneous incorporation of SiO x ( < 5 nm) in carbon hollow capsids at a nanocluster scale. The obtained SiO x /C hollow spheres exhibit excellent Li + ‐ion storage behaviors, including cycling lifespan, coulombic efficiency, and rate performance. The superior performance is attributed to the well‐dispersed SiO x nanoclusters in carbon substrate and the hollow structure. This molecular polymerization approach not only enables Si‐based hollow composites effective and scalable anode materials but also opens up a new avenue for the controllable synthesis of template‐free hollow architectures.

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Идентификаторы

DOI: 10.1002/adfm.202101145

Цитирования и источники

Цитирований: 2Использованных источников: 0

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