Work

Carbon-encapsulated silicon ordered nanofiber membranes as high-performance anode material for lithium-ion batteries

Year: 2024

Type: article

Abstract: Silicon have attracted much attention as a promising anode material for lithium-ion batteries due to the extremely high theoretical capacity. However, its practical application is limited by the huge volume expansion during the cycling process. To address this issue, carbon-encapsulated silicon ordered nanofiber membranes were designed through a modified electrospinning technology with a strong magnetic field . Compared with the conventional nanofiber membranes, the optimized M1200 Gs anode exhibited a high discharge capacity of 1603.1 mAh·g −1 at 0.1 A·g −1 , a superior rate performance, and a robust cycling stability with a reversible capacity of 658.1 mAh·g −1 at 1 A·g −1 after 100 cycles. The improved electrochemical performance was confirmed to be highly correlated with the parallel structure of nanofibers, which help to facilitate the diffusion and transport of electrons and ions, realize the stress distribution and buffer the volume changes. This work provides unique insights into designing silicon-based anodes with novel structures for lithium-ion batteries.

Source: Journal of Alloys and Compounds

DOI: 10.1016/j.jallcom.2024.177012