高炉渣提取硅制备高性能锂离子电池硅碳负极材料的研究  

Synthesis of High-Performance Silicon-Carbon Anode Materials with Silicon Extracted from Blast Furnace Slag for Lithium-Ion Batteries

作　　者：刘思名 赵俊楷 孟必成 张豪 田文鑫 俞娟[1] LIU Siming;ZHAO Junkai;MENG Bicheng;ZHANG Hao;TIAN Wenxin;YU Juan(School of Metallurgical Engineering,Xi′an University of Architecture and Technology,Xi′an 710055,Shaanxi,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《矿冶工程》2024年第4期54-60,共7页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(52374358);陕西省自然科学基础研究计划(2023-JC-QN-0436)。

摘　　要：以高炉渣中提取的硅材料BFSi为硅源、聚丙烯腈(PAN)为碳源制备锂离子电池硅碳负极材料,研究了硅与聚丙烯腈的配比对BFSi@C材料电化学性能的影响。结果表明:BFSi与PAN质量比3∶1时制备的BFSi@C样品在0.5 A/g电流密度下初始充电比容量为1884.99 mAh/g,经过100次循环后,充电比容量仍有1509.32 mAh/g,容量保持率为80.07%;在高电流密度下,BFSi@C材料表现出优异的倍率性能。与商业硅材料相比,BFSi@C具有更高的循环容量和更好的倍率性能,在5 A/g电流密度下比容量高达538.31 mAh/g。With silicon material(BFSi)extracted from blast furnace slag as silicon source and polyacrylonitrile(PAN)as carbon source,a kind of silicon-carbon anode material for lithium-ion batteries was synthesized.And the influence of ratio of silicon to polyacrylonitrile on the BFSi@C material was investigated.Results show that BFSi@C synthesized with BFSi and PAN in a mass ratio of 3∶1 delivers an initial charge capacity of 1884.99 mAh/g at a current density of 0.5 A/g.After 100 cycles,it still delivers a specific charge capacity of 1509.32 mAh/g,with a capacity retention rate of 80.07%.Moreover,it presents excellent rate performance at high current densities.Compared with commercial silicon materials,BFSi@C demonstrates higher cycle capacity and superior rate performance,delivering a specific capacity up to 538.31 mAh/g at a current density of 5 A/g.

关 键 词：高炉渣 硅材料 聚丙烯腈 锂离子电池 硅碳负极 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]