Preparation of SiOx@C via wet carbon coating for high performance lithium-ion batteries

Silicon monoxide (SiOx, 0 < x < 2) is welcomed in the research of anode materials, because its high theoretical capacity, while it is restricted in commercial applications due to its low electrical conductivity and large volume expansion. Therefore, a carbon coated SiOx was obtained via spray drying and high temperature treatment. The results show that with a uniform carbon layer on the surface, its electrical conductivity is greatly enhanced, and volume expansion is constrained to some extent. At the rate of 0.5C, the discharge capacity of carbon coated SiOx is 1101.03 mAh<middle dot>g(-1), while that of pristine SiOx is 581.18 mAh<middle dot>g(-1) after 150 cycles, increasing by almost 50%.