阳极
材料科学
碳纳米管
硅
复合数
碳化
电化学
锂(药物)
电流密度
化学工程
碳纤维
复合材料
纳米技术
电极
化学
冶金
扫描电子显微镜
物理化学
内分泌学
工程类
物理
医学
量子力学
作者
Yiming Liu,Jianzheng Duan,Pengfei Chen,Peihua Li,Wanggang Zhang,Xiaohong Li,Jian Wang
标识
DOI:10.1002/asia.202400838
摘要
Silicon, as the most promising advanced anode material for lithium-ion batteries, faces challenges in large-scale industrial production due to the significant volume expansion effect. In this investigation, Si/CNTs/C composite materials were effectively produced through high-temperature carbonization utilizing asphalt, silicon, hexahydrate ferric chloride, and melamine as primary elements. The distinctive dual-carbon framework of asphalt-derived carbon and carbon nanotubes alleviates the volume expansion of silicon, thereby stabilizing the composite material's structure. Testing the electrochemical performance reveals that the Si/CNTs/C composite material exhibits a reversible specific capacity of 1187 mAh g-1 with a capacity retention rate of 92.6 % after 150 cycles at a current density of 0.2 A g-1. Even after 500 cycles at a current density of 1 A g-1, it sustains a specific capacity of 879.4 mAh g-1 with a capacity retention rate of 87.9 %, showcasing outstanding electrochemical performance.
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