Sol-gel synthesis of nanometer silicon/silicon suboxide/carbon anode material  

作　　者：QIN Tong WANG Zheng LI Zhengzheng 

机构地区：[1]Carbon Research Institute,Baowu Carbon Technology Co.,Ltd.,Shanghai 201999,China

出　　处：《Baosteel Technical Research》2024年第2期12-18,共7页宝钢技术研究（英文版）

摘　　要：A stacked Si/SiO_(x)/C composite anode material with carbon-coated structure was prepared by sol-gel method combined with carbothermal reduction using organic silicon.The results of X-ray diffractometry, scanning electron microscopy, and elemental analysis show that the Si/SiO_(x)/C material is a secondary particle with a porous micronanostructure, and the presence of nanometer silicon does not affect the carbothermal reduction and carbon coating.Electrochemical test results indicate that the specific capacity and first coulombic efficiency of SiO_(x)/C composite with nanometer silicon can be increased to 1 946.05 mAh/g and 76.49%,respectively.The reversible specific capacity of Si/SiO_(x)/C material blended with graphite is 749.69 mAh/g after 100 cycles at a current density of 0.1 C,and the capacity retention rate is up to 89.03%.Therefore, the composite has excellent electrochemical cycle stability.

关 键 词：sol-gel method nanometer silicon silicon suboxide anode material 

分 类 号：TB332[一般工业技术—材料科学与工程] O646[理学—物理化学] TM912[理学—化学]