材料科学与工程学报2025，Vol.43Issue(2)：178-186,201,10.DOI:10.14136/j.cnki.issn1673-2812.2025.02.002
不同取代度聚丙烯酸锂黏结剂改性工业废硅负极的储锂行为及机理
Lithium Storage Behavior and Mechanisms of Industrial Waste Silicon Anodes Modified by Lithium Polyacrylate Binders with Various Substitution Degrees
摘要
Abstract
This study uses recycled waste silicon from photovoltaic sources as a raw material,coupled with lithium polyacrylate binders to fabricate high-performance Si-based anodes.It was found that the partial substitution of the H atoms in the carbonyl bond of the polyacrylate(PAA)to Li not only dramatically improved the overall mechanical strength of the electrode,but also induced the formation of a LiF-rich solid electrolyte interlayer on the surface of Si particles,which effectively enhanced the cycling stability and rate performance of the silicon anodes.The Li0.75 PAA-modified sample achieved a reversible specific capacity of 1659 mAh/g after 100 cycles at 300 mA/g,and the corresponding capacity retention increased from 16％for the PAA-modified anode to 63％.Furthermore,the Li0.75 PAA-modified anode still delivered a reversible specific capacity of 1662 mAh/g at 2 A/g.Studies indicate that the Li substituted PAA not only contributes to the construction of the conductive network of the electrodes,but also improves the lithium-ion diffusion coefficient and mechanical strength of the electrode.The volume expansion during lithiation and delithiation,and the pulverization and exfoliation of active materials are effectively reduced.As a result,substantial improvement of the lithium storage performance of the waste silicon anode is achieved.关键词
锂离子电池/硅基负极/聚丙烯酸锂黏结剂/废硅/循环稳定性Key words
Lithium-ion battery/Silicon-based anode/Lithium polyacrylate Binder/Waste silicon/Cyclic stability分类
化学工程引用本文复制引用
陈小飞,王瑞滋,张欣,高明霞,孙文平,刘永锋,潘洪革..不同取代度聚丙烯酸锂黏结剂改性工业废硅负极的储锂行为及机理[J].材料科学与工程学报,2025,43(2):178-186,201,10.基金项目
国家重点研发计划项目(2023YFB2504000) （2023YFB2504000）
国家杰出青年科学基金项目(52125104) （52125104）
中央高校基本科研业务费项目(226-2024-00075) （226-2024-00075）
浙江省"尖兵领雁+X"研发攻关计划项目(2024C01182) （2024C01182）
