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
MetadataShow full item record
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.
Showing items related by title, author, creator and subject.
Effect of milling method and time on the properties and electrochemical performance of LiFePO<inf>4</inf>/C composites prepared by ball milling and thermal treatmentZhang, D.; Cai, R.; Zhou, Y.; Shao, Zongping; Liao, X.; Ma, Z. (2010)Effects of ball milling way and time on the phase formation, particulate morphology, carbon content, and consequent electrode performance of LiFePO4/C composite, prepared by high-energy ball milling of Li2CO3, NH4H2PO4, ...
Formation and characteristics of glucose oligomers during the hydrolysis of cellulose in hot-compressed waterYu, Yun (2009)Energy production from fossil fuels results in significant carbon dioxide emission, which is a key contributor to global warming and the problems related to climate change. Biomass is recognized as an important part of ...
Morphology and catalytic performance of flake-shaped NiO-yttria-stabilized zirconia (YSZ) particles with nanocrystalline YSZ grainsWu, Y.; Wang, W.; Wang, K.; Zeng, Y.; Dong, Dehua; Shao, Z.; Wang, H. (2012)The flake-shaped NiO-yttria-stabilized zirconia (YSZ) particles with nanocrystalline YSZ grains were synthesized using the sucrose-concentrated H2SO4 dehydration reaction, and their microstructure was characterized by ...