Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 34, Pages 14420-14426Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp51799c
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The m-SiOx/Si composite for lithium ion battery anode was prepared via a partial reduction reaction between ball-milled silicon monoxide and magnesium by high-energy mechanical milling. The m-SiOx/Si is composed of Si-suboxide and embedded Si nano-crystallites. The particles were further covered by a uniform carbon layer on the surface via a chemical vapor deposition process. The m-SiOx/Si/C composite shows a stable reversible capacity of ca. 1250 mA h g(-1) and excellent cycling stability with 90.9% capacity retention on the 100th cycle versus the 6th one (compared at the same current rate). In contrast, SiO pre-milled for 25 h presents a reversible capacity of only ca. 900 mA h g(-1) under the same carbon coating condition.
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