High yield and low-cost ball milling synthesis of nano-flake Si@SiO2 with small crystalline grains and abundant grain boundaries as a superior anode for Li-ion batteries

Xianhua Hou, Miao Zhang, Jiyun Wang, Shejun Hu, Xiang Liu, Zongping Shao

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

A high yield and low-cost high-energy wet ball milling method is used for producing nano-flake Si@SiO2 as an anode material for Li-ion batteries. After a two-step ball milling (coarse milling and fine milling) process, the irregular plate-like micrometric Si (average particle size is 27.4 μm) is fractured into nano-flake Si@SiO2 (average particle size is 154.8 nm) with small crystalline grains and abundant grain boundaries. Due to the significant changes of the prepared nano-flake Si@SiO2 in the surface composition, particle size and crystal structure, the ball milled Si shows better electrochemical performance compared with the as-received micrometric Si. And the fine milled Si shows the best electrochemical properties with a high initial coulombic efficiency of 84.6% and a specific capacity of 1920.4 mA h g-1 at a current density of 100 mA g-1 after 100 cycles.

Original languageEnglish
Pages (from-to)27-35
Number of pages9
JournalJournal of Alloys and Compounds
Volume639
DOIs
StatePublished - 17 Jun 2015

Keywords

  • Anode
  • Crystal structure
  • High-energy wet ball milling
  • Lithium-ion batteries
  • Silicon
  • Silicon dioxide

Fingerprint

Dive into the research topics of 'High yield and low-cost ball milling synthesis of nano-flake Si@SiO2 with small crystalline grains and abundant grain boundaries as a superior anode for Li-ion batteries'. Together they form a unique fingerprint.

Cite this