阳极
静电纺丝
锂(药物)
离子
材料科学
简单(哲学)
化学工程
纳米技术
复合材料
化学
电极
有机化学
工程类
物理化学
聚合物
医学
认识论
内分泌学
哲学
作者
Yongqi Li,Peichen Yang,Zhanyi Jia,Yufeng Sun,Jing Wang,Тран Дай Лам,Yijun Yang,Yong Xu,Xi Wang,Yongan Yang
标识
DOI:10.1002/slct.202401351
摘要
Abstract The development of free‐standing and foldable electrodes with excellent electrochemical performance is paramount for flexible electronic devices. However, the silicon‐based free‐standing anodes lack a straightforward preparation process. Herein, we successfully designed a hierarchical Si@C/CNFs composite material by combining hydrothermal and electrospinning techniques, in which the carbon‐coated silicon (Si@C) is served as the primary nanostructure and carbon nanofibers (CNFs) from electrospinning are maintained as the network matrix, resulting in a free‐standing anode. Owing to the amorphous carbon coating on Si nanoparticles and the formation of a 3D network structure of CNFs, which tightly encases the primary Si@C nanostructure, the Si@C/CNFs electrode demonstrates exceptional conductivity and flexibility. This dual carbon‐layer structure further enhances kinetics and mitigates the volume expansion of Si nanoparticles. The Si@C/CNFs electrode exhibits a high specific capacity (1573 mAh g −1 at 0.1 A g −1 ), exceptional rate capability, and excellent cycling stability (78.5 % capacity retention after 100 cycles). Thus, Si@C/CNFs can be a promising material for the anode electrode in flexible lithium‐ion batteries.
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