Facile Synthesis of SiOx/C Composite with Homogeneous Distribution of SiOx and Carbon as Anodes for Superior Lithium‐Ion Batteries

Author:

Ling Yang1,Peng Yan2,Guan Shiyou12ORCID

Affiliation:

1. School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China

2. Department of Chemistry, College of Science Shanghai University 99 Shang-Da Road Shanghai 200444

Abstract

AbstractSiOx/C composites with uniform distribution of silicon oxide (SiOx) and carbon are promising anodes for lithium‐ion batteries. However, designing the SiOx/C composites with uniformly dispersed of carbon at nanoscale and controllable carbon content is still a challenge. Herein, a series of SiOx/C composites with uniform carbon distribution were prepared by sol‐gel method and subsequent pyrolysis process, the carbon content can be easily adjusted just by selecting different organosilanes. Due to the uniformly dispersed of carbon at nanoscale, the obtained products showed the excellent energy storage performance. Particularly, when Bis(triethoxysilyl)benzene (BTEB) was used as the raw materials, due to the appropriate carbon content, the SiOx/C−B exhibited a high reversible capacity of 535 mAh g−1 at 0.1 A g−1 over 100 cycles. The cycle stability is preserved even after 300 cycles at a high current density of 1.0 A g−1, where the electrodes still supply a specific capacity of 389.7 mAh g−1.

Publisher

Wiley

Subject

General Chemistry

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