Effect of dispersion of Si nano-powders to properties of silicon carbon anodes
QIN Haiqing
LIU Wenping
LEI Xiaoxu
LIN Feng
ZHANG Zhenjun
ZHANG Jianwei
Abstract：Si nano-powders were prepared by radio frequency inductively coupled plasma evaporation method,which were good crystalline and smooth surface spherical powders.Specific surface area and average grain diameter were 40.03 m2/g and 64.05 nm respectively.10％ Si nano-powders dispersion liquid with ethylene glycol and deionized water wsa prepared.It can be found that Si nano-powders in ethylene glycol has better dispersion and smaller particle size than in deionized water,particle size distribution is 94.17～152.88 nm.Silicon carbon composite cathode materials at m (G) ∶ m (Si) ratio have better electrochemical performance,which are prepared through pulping with 10％ Si nano-powers ethylene glycol dispersion and graphite.First discharge capacity is 812.5mA ·h/g,charge capacity is 631.0 mA ·h/g,and capacity remain is 73.74％ after 30 cycles.
Keywords：Si nano-powdersdispersioncomposite anodeselectrochemical properties
Publication Date：2017-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 88-93 )