Engineering Molecular Polymerization for Template-Free SiOx/C Hollow Spheres as Ultrastable Anodes in Lithium-Ion Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiaoming Zhou
  • Yang Liu
  • Tiansheng Mu
  • Xucai Yin
  • Chunyu Du
  • Hua Huo
  • Xinqun Cheng
  • Pengjian Zuo
  • Geping Yin

Detail(s)

Original languageEnglish
Article number2101145
Journal / PublicationAdvanced Functional Materials
Volume31
Issue number21
Online published27 Mar 2021
Publication statusPublished - 1 May 2021
Externally publishedYes

Abstract

SiOx/C composites with a void-reserving structure are promising anodes for lithium-ion batteries. However, the facile and controllable synthesis of uniformly dispersed SiOx and carbon components, simultaneously incorporating ample voids, still remains a great challenge. Herein, a molecular polymerization strategy is devised to construct SiOx/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 SiOx (<5 nm) in carbon hollow capsids at a nanocluster scale. The obtained SiOx/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 SiOx 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.

Research Area(s)

  • aldimine condensation, hollow spheres, lithium-ion batteries, nanocluster-scale distribution, SiO x/C anodes

Citation Format(s)

Engineering Molecular Polymerization for Template-Free SiOx/C Hollow Spheres as Ultrastable Anodes in Lithium-Ion Batteries. / Zhou, Xiaoming; Liu, Yang; Ren, Yang et al.

In: Advanced Functional Materials, Vol. 31, No. 21, 2101145, 01.05.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review