化工矿物与加工2025，Vol.54Issue(2)：25-34,10.DOI:10.16283/j.cnki.hgkwyjg.2025.02.004
高性能电池级磷酸铁制备工艺过程控制研究
Research on process control of high-performance battery-grade iron phosphate preparation
摘要
Abstract
With the development of the global new energy power battery industry,lithium-ion batteries have become the mainstream of the market.Among them,lithium iron phosphate batteries have received widespread attention due to their excellent performance.As a precursor,iron phosphate has an important impact on the performance of lithium iron phosphate cathode materials.This article used the sodium method to prepare iron phosphate and explored the effects of precipitation temperature,stirring speed,washing frequency,calcination temperature and time,precipitation pH,and addition of dispersants on the quality of iron phosphate products.The results indicate that the iron phosphorus ratio of the product increases with the decrease of precipitation pH,and the introduction of anionic surfactants helps to improve the iron phosphorus ratio of the product.The sulfur content of the product decreases with the increase of washing times,the decrease of precipitation pH,and the increase of calcination temperature.The specific surface area decreases with the increase of calcination temperature,and the introduction of anionic or polymeric surfactants can in-crease the specific surface area.The optimal process conditions were obtained through comprehensive analysis:stirring speed of 800 r/min,precipitation pH of 1.6,precipitation temperature of 80℃,washing 4 times,calcination temper-ature of 500℃,calcination time of 3 hours,and addition of anionic surfactants and their complexes.Under these con-ditions,the sulfur content of the high-performance battery grade iron phosphate product prepared is less than or equal to 30×10-6,and the specific surface area is greater than or equal to 9.5 m2/g,and an iron phosphorus ratio of 0.970～0.978.关键词
磷酸铁/铁磷比/硫含量/比表面积/表面活性剂/锂电池Key words
iron phosphate/iron-phosphorus ratio/sulfur content/specific surface area/surfactant/surfactants/lithium battery分类
动力与电气工程引用本文复制引用
盛国臣,余欣鑫,管庆永,何兵兵,龙小康..高性能电池级磷酸铁制备工艺过程控制研究[J].化工矿物与加工,2025,54(2):25-34,10.基金项目
贵州优势特色矿产资源高效利用研究(黔科合战略找矿[2022]ZD006). （黔科合战略找矿[2022]ZD006）
