化工进展2025，Vol.44Issue(4)：2196-2201,6.DOI:10.16085/j.issn.1000-6613.2024-0487
进风量对硅/碳负极材料二次颗粒尺寸及电化学性能的影响
Effect of air inlet on secondary particle size and electrochemical properties of silicon/carbon anode materials
摘要
Abstract
Silicon,as one of the most promising anode materials for lithium-ion batteries,boasts a high theoretical capacity(4200mAh/g).However,silicon suffers from poor electrical conductivity and significant volume expansion during the charge-discharge process,leading to pulverization of the anode and a consequent sharp decline in battery performance.Secondary particle formation can enhance the isotropic characteristics of the material,thereby improving the initial Coulombic efficiency and enhancing rate capability.Among the factors,the size of secondary particles is critical.In this study,fulvic acid potassium(FAP)was used as a carbon source to fabricate Si/C anode secondary particles.The Si/C composite anode material was assembled into coin cells and characterized using scanning electron microscopy(SEM)and electrochemical techniques to analyze the impact of the air inlet during the spray drying process on the size of secondary particles.The results indicated that at a spray feed rate of 310mL/h and an air inlet rate of 29m³/h,the Si/C anode composite material achieved an initial Coulombic efficiency of 86.39％.After 100 cycles,the reversible capacity was significantly higher than that of pure silicon anode material,retaining a reversible capacity of 1134.1mAh/g at a 0.1A/g rate test.关键词
电化学/复合材料/粒度分布/锂离子电池/黄腐酸钾/二次颗粒Key words
electrochemistry/composites/particle size distribution/lithium-ion battery/fulvic acid potassium/secondary particle分类
信息技术与安全科学引用本文复制引用
张舒茜,陈佩婷,蒲建波,王宇作,阮殿波,乔志军..进风量对硅/碳负极材料二次颗粒尺寸及电化学性能的影响[J].化工进展,2025,44(4):2196-2201,6.基金项目
宁波市重大科技项目(2022Z206) （2022Z206）
浙江省2022年度"尖兵""领雁"研发攻关计划(2022C01072). （2022C01072）
