基于废弃光伏硅源的SiNPs@Fe/Fe3C/C负极材料
SiNPs@Fe/Fe3C/C anode material based on waste photovoltaic silicon
摘要
针对硅基负极体积膨胀大、界面稳定性差、本征电导率低的问题,同时为实现废弃晶体硅光伏电池板的高值化回收,以废弃光伏硅为原料,经酸碱蚀刻、高能球磨制备硅纳米颗粒(SiNPs),再通过液相浸渍-固相混合复合生物质碳与铁源,高温碳化构筑"硅核-Fe/Fe3C-碳壳"多级结构SiNPs@Fe/Fe3C/C复合负极.XRD、透射电子显微镜(TEM)证实,Fe/Fe3C颗粒引入且均匀分散.电化学测试显示,该负极性能良好:以1.0 A/g电流在0.005～1.500 V循环200次,可逆比容量达924 mAh/g;4.0 A/g 电流下的比容量 894 mAh/g.
To tackle the issues of silicon-based anodes such as big volume expansion,poor interface stability,low intrinsic conductivity,and to realize high-value recycling of waste crystalline silicon photovoltaic cell panels,silicon nanoparticles(SiNPs)from waste photovoltaic silicon are fabricated via acid-base etching and high-energy ball milling.The SiNPs are further composited with biomass carbon and iron source via liquid-phase impregnation and solid-phase mixing,followed by high-temperature carbonization to yield a hierarchical SiNPs@Fe/Fe3C/C composite anode with a"silicon core-Fe/Fe3C-carbon shell"structure.XRD and transmission electron microscopy(TEM)verify the incorporation and uniform distribution of Fe/Fe3C nanoparticles.Electrochemical tests reveal good performance:a reversible specific capacity of 924 mAh/g after 200 cycles at 1.0 A/g in 0.005-1.500 V,894 mAh/g at 4.0 A/g.
年，卷(期)：
2026, 56(4)
分类号：
TM912.9
TM914.4
TD98
机标分类号：
TM912.9
TM242
O646.541
在线出版日期：
2026年9月20日
基金项目：
2025AFA025:湖北省自然科学基金创新群体项目2023010201010145:武汉市科技计划项目，
