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磷酸铁作为磷酸铁锂的前驱体，其水分、比表面积、硫含量对磷酸铁锂电池的电荷转移阻抗、充放电倍率等性能有重要影响。采用均相共沉淀法合成二水磷酸铁，研究煅烧过程中磷酸铁水分、比表面积、硫含量随保温时间和烧结温度的变化规律，以及煅烧过程中发生的相转变及煅烧温度对磷酸铁形貌的影响。结果表明，大部分结晶水在300℃以前脱除；脱硫主要发生于400～500℃；当温度高于500℃后，硫含量变化不再明显，此时开始发生粒子融合，且煅烧温度升高会增加粒子融合现象；转晶行为发生于530℃，在550℃下煅烧6 h时可以转晶完全。
Abstract：Iron phosphate,as the precursor of lithium iron phosphate,it's water content,specific surface area and sulfur content have important effects on the electrical performance of lithium iron phosphate batteries,such as charge transfer impedance and charge-discharge rate. Iron phosphate dihydrate is synthetized by homogeneousco precipitation method,the changes of water content,specific surface and sulfur content of iron phosphate with holding time and sintering temperature,as well as the phase transformation and morphology changes with calcination temperature are studied. It is found that the dehydration mainly occurres before 300 ℃and desulfurization process mainly occurres between 400-500 ℃. When the temperature is higher than 500 ℃,the sulfur content changes no longer significantly,the particle fusion occurs at this time and will be aggravated under the higher temperature. Phase transition begins at 530 ℃,and can be completely transformed at 550 ℃for 6 h.
[1]李超，刘述平，冯雪茹.磷酸铁锂前驱体磷酸铁的研究进展[J].广州化工，2017,45(24):17-19.LI C,LIU S P,FENG X R. Research Progress on Ferric Phosphate in Precursor of Lithium Iron Phosphate[J]. Guangzhou Chemical Industry,2017,45(24):17-19.
[2]陈胜文，李洪，刘利，等.磷酸铁的制备工艺及应用展望[J].化纤与纺织技术，2021,50(11):37-39.CHEN S W,LI H,LIU L,et al. Preparation process and application prospects of iron phosphate[J]. Chemical Fiber and Textile Technology,2021,50(11):37-39.
[3]李瑞标.共沉淀法制备磷酸铁的试验研究[J].中国资源综合利用，2023,41(12):45-47.LI R B. Experimental Study on the Preparation of Iron Phosphate by Coprecipitation Method[J]. China Resources Comprehensive Utilization,2023,41(12):45-47.
[4]马航，查坐统，王君婷，等.锂离子电池前驱体磷酸铁合成方法研究现状及展望[J].磷肥与复肥，2023,38(3):19-22,52.MA H,ZHA Z T,WANG J T,et al. Research status and prospect of synthesis method of iron phosphate as lithium battery precursor[J]. Phosphate&Compound Fertilizer,2023,38(3):19-22,52.
[5] ALIOUANE N,BADECHE T,GAGOU Y,et al. Synthesis and phase transitions of iron phosphate[J]. Ferroelectrics,2000,241(1):255-262.
[6]李立平，李煜乾.不同晶体类型磷酸铁的制备及电化学性能的研究进展[J].化工技术与开发，2022,51(8):27-32.LI L P, LI Y Q. Research Process on Preparation and Electrochemical Properties of Several Crystal Forms of Iron Phosphate[J]. Technology&Development of Chemical Industry,2022,51(8):27-32.
[7]刘美霞，郭举，张丹.电池级磷酸铁中硫酸根的脱除研究[J].云南化工，2017,44(5):20-22.LIU M X,GUO J,ZHANG D. Study on removal of sulfate impurity in battery-grade ferric phosphate[J]. Yunnan Chemical Technology,2017,44(5):20-22.
[8] REN X Y,SUN Q,ZHU Y L,et al. Unveiling the role of hydroxyl architecture on polysulfide trapping for high-performance lithium-sulfur batteries[J]. ACS Applied Energy Materials,2020,3(4):4023-4032.
[9]柯翔，肖仁贵，廖霞，等.磷酸铁正极材料的研究进展[J].电子元件与材料，2017,36(7):1-8.KE X,XIAO R G,LIAO X,et al. Research progress of FePO4cathode material[J]. Electronic Components and Materials,2017,36(7):1-8.
[10]夏宏瑞.磷酸铁制备工艺对磷酸铁锂性能的影响[D].哈尔滨:哈尔滨工程大学，2023.XIA H R. Effect of preparation process of ferric phosphate on properties of lithium iron phosphate[D]. Harbin:Harbin Engineering University,2023.
基本信息:
DOI：
中图分类号:TM912;TQ138.11
引用信息:
[1]吴松,彭海南,冷国琴等.二水磷酸铁煅烧过程对磷酸铁品质的影响研究[J].生态产业科学与磷氟工程,2024,39(11):13-17.
基金信息:
磷酸铁反应连续化关键技术与产业化研究（新能源科技YF(2023)017）