材料科学
碳纳米管
锂(药物)
阳极
硅
碳纤维
纳米技术
压力(语言学)
储能
复合材料
冶金
复合数
电极
医学
语言学
化学
哲学
功率(物理)
物理
物理化学
量子力学
内分泌学
作者
Hao Li,Binghua Yao,Ming Li,Xiangwei Zou,Ruixian Duan,Haoqi Li,Qinting Jiang,Guiqiang Cao,Jun Li,Huan Yan,Na Xu,Bo Sun,Jingjing Wang,Xifei Li
出处
期刊:PubMed
日期:2024-08-20
标识
DOI:10.1021/acsami.4c09120
摘要
Silicon/graphite composites show a high specific capacity and improved cycling stability. However, the intrinsic difference between silicon and graphite, such as unequal volume expansion and lithium-ion diffusion kinetics, causes persistent stress at the silicon/graphite interface and the expansion of the electrical isolation region. Herein, carbon nanotubes (CNTs) were successfully introduced into silicon/carbon composites via ball milling and spray drying, which effectively relieved the stress concentration at the direct contact interface and formed a three-dimensional conductive structure. In addition, CNTs and amorphous carbon acting as "lubricants" further improved the inherent differences between silicon and graphite. As a result, the Si/CNTs/G@C-1 anode increased the cycling performance and rate capability, with a reversible capacity of up to 465 mAh g
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