Scalable synthesis of interconnected porous silicon/carbon composites by the rochow reaction as high-performance anodes of lithium ion batteries

Zailei Zhang, Yanhong Wang, Wenfeng Ren, Qiangqiang Tan, Yunfa Chen, Hong Li, Ziyi Zhong, Fabing Su*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

154 Scopus citations

Abstract

Despite the promising application of porous Si-based anodes in future Li ion batteries, the large-scale synthesis of these materials is still a great challenge. A scalable synthesis of porous Si materials is presented by the Rochow reaction, which is commonly used to produce organosilane monomers for synthesizing organosilane products in chemical industry. Commercial Si microparticles reacted with gas CH3Cl over various Cu-based catalyst particles to substantially create macropores within the unreacted Si accompanying with carbon deposition to generate porous Si/C composites. Taking advantage of the interconnected porous structure and conductive carbon-coated layer after simple post treatment, these composites as anodes exhibit high reversible capacity and long cycle life. It is expected that by integrating the organosilane synthesis process and controlling reaction conditions, the manufacture of porous Si-based anodes on an industrial scale is highly possible. Digging pores: A scalable synthesis route was developed to prepare interconnected porous Si/C composites by the commercialized Rochow reaction using Si microparticles and CH3Cl gas over the various Cu-based catalysts under the mild reaction conditions. The obtained porous Si/C materials as anodes of Li ion batteries exhibit high electrochemical performance.

Original languageEnglish
Pages (from-to)5165-5169
Number of pages5
JournalAngewandte Chemie - International Edition
Volume53
Issue number20
DOIs
StatePublished - 12 May 2014
Externally publishedYes

Keywords

  • anode materials
  • heterogeneous catalysis
  • lithium storage
  • porous nanostructures
  • silicon

Fingerprint Dive into the research topics of 'Scalable synthesis of interconnected porous silicon/carbon composites by the rochow reaction as high-performance anodes of lithium ion batteries'. Together they form a unique fingerprint.

Cite this