In-situ synthesis of interconnected SWCNT/OMC framework on silicon nanoparticles for high performance lithium-ion batteries

• 作者: Baozeng Ren Daliang Fang Jia Yu Shimou Chen Suojiang Zhang Weiwei Li
• 来源期刊: 绿色能源与环境：英文版
• 学科: 工学
• 年，卷（期）: 2016,（1）
• 页码范围: 91-99
• 页数: 9页
• 分类号: TM912

摘要

In spite of silicon has a superior theoretical capacity, the large volume expansion of Si anodes during Li+ insertion/extraction is the bottle neck that results in fast capacity fading and poor cycling performance. In this paper, we report a silicon, single-walled carbon nanotube, and ordered mesoporous carbon nanocomposite synthesized by an evaporation-induced self-assembly process, in which silicon nanoparticles and single-walled carbon nanotubes were added into the phenolic resol with F-127 for co-condensation. The ordered mesoporous carbon matrix and single-walled carbon nanotubes network could effectively accommodate the volume change of silicon nanoparticles, and the ordered mesoporous structure could also provide efficient channels for the fast transport of Li-ions. As a consequence, this hybrid material exhibits a reversible capacity of 861 mAh g-1 after 150 cycles at a current density of 400 mAg-1. It achieves significant improvement in the electrochemical performance when compared with the raw materials and Si nanoparticle anodes.