摘要
以工业用乙炔为碳源,氧化亚硅为硅源,通过CVD气相包覆法,制备出硅氧碳复合负极材料,该复合材料能够有效缓解硅的体积膨胀,提升导电性,从而提高硅基负极的稳定性和电池的循环寿命。通过使用激光粒度仪和扫描电子显微镜(SEM)等表征手段研究复合材料的形貌结构,通过恒流充放电测试仪对材料的电化学性能进行测试。结果表明,复合材料在电流密度为100mA/g时,可逆比容量为1403mAh/g,首次库仑效率为77%,性能优异。CVD气相包覆法可以很容易地适应现有锂电池材料的生产工艺。
Using industrial acetylene as carbon source and silicon oxide as silicon source,silicon-oxygen-carbon composite anode material is prepared by CVD gas phase coating method.It can effectively alleviate the volume expansion of silicon and improve the conductivity,thereby improving the stability of silicon-based anode and the cycle life of the battery.The morphology and structure of the composites are studied by means of laser particle size analyzer and scanning electron microscope(SEM),and the electrochemical properties of the materials are tested by constant current charge-discharge tester.The results show that the reversible capacity of the composite is 1403 mAh/g at a current density of 100 mA/g,and the first coulombic efficiency is 77%,the performance is excellent.The CVD vapor phase coating method can easily adapt to the production process of existing lithium battery materials.
作者
喻宏兴
YU Hongxing(Nanyang Tiancheng New Energy Technology Co.,Ltd.,Nanyang 474400,China)
出处
《河南化工》
2025年第8期20-22,27,共4页
Henan Chemical Industry
关键词
氧化亚硅
硅氧碳
负极材料
锂离子电池
silicon oxide
silicon oxycarbon
anode material
Li-ion battery
