无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
研究与开发

硝酸铁和磷酸共沉淀法制备电池级磷酸铁工艺研究

  • 王紫涵 ,
  • 李军 ,
  • 陈明 ,
  • 周青禺
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  • 四川大学化学工程学院,四川 成都 610065
王紫涵(1998— ),女,硕士,主要研究方向为无机化工新技术新工艺研发;E-mail:w_zh0102@163.com

收稿日期: 2022-09-11

  网络出版日期: 2023-07-13

Study on preparation of battery grade ferric phosphate by co-precipitation of ferric nitrate and phosphoric acid

  • WANG Zihan ,
  • LI Jun ,
  • CHEN Ming ,
  • ZHOU Qingyu
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  • School of Chemical Engineering,Sichuan University,Chengdu 610065,China

Received date: 2022-09-11

  Online published: 2023-07-13

摘要

以硝酸铁和磷酸为原料,利用共沉淀法制备了电池级磷酸铁,研究了反应温度、反应物浓度、投料比和反应时间对磷酸铁产率和粒径的影响,并通过正交优化得到了最佳的工艺条件:硝酸铁浓度为1.1 mol/L、投料比(磷酸与硝酸铁物质的量比)为1.1、反应温度为90 ℃、反应时间为8 h。采用扫描电镜(SEM)、激光粒度仪、X射线衍射仪(XRD)、热重-差式扫描量热仪(TG-DTA)等对制备的磷酸铁进行表征分析。分析结果表明:在优化条件下得到的二水磷酸铁为单斜晶,纯度高,二次粒径D50为2.41 μm,均符合电池级磷酸铁的要求。以磷酸铁为前驱体制备的LiFePO4/C性能良好,将其作为正极材料组成的电池在0.05C、0.1C、1C倍率下首次放电比容量分别为143.9、136.8、131.4 mA·h/g。

本文引用格式

王紫涵 , 李军 , 陈明 , 周青禺 . 硝酸铁和磷酸共沉淀法制备电池级磷酸铁工艺研究[J]. 无机盐工业, 2023 , 55(7) : 51 -57 . DOI: 10.19964/j.issn.1006-4990.2022-0548

Abstract

By using ferric nitrate and phosphoric acid as raw materials,the co-precipitation method was used to prepare the battery grade ferric phosphate.The effects of reaction temperature,reactant concentration,feeding proportion and reaction time on the yield and particle size of ferric phosphate were studied,and the optimal process conditions were obtained through orthogonal optimization:the solution concentration of Fe(NO33 was 1.1 mol/L,the feed ratio of phosphoric acid to ferric nitrate was 1.1,the reaction temperature was 90 ℃,and the reaction time was 8 h.The prepared iron phosphate was characterized by scanning electron microscopy(SEM),laser particle size analyzer,X-ray diffractometer(XRD) and TG-DTA.The analysis results showed that the obtained ferrophosphate dihydrate was monoclinic crystal with high purity and secondary particle size D50 of 2.41 μm,which met the requirements of battery grade ferrophosphate.The performance of LiFePO4/C prepared by the precursor system of iron phosphate was good.The initial discharge specific capacity of the battery composed of iron phosphate as cathode materials were 143.9,136.8 and 131.4 mA·h/g at 0.05C,0.1C and 1C,respectively.

参考文献

1 张克杰,陈鹏,谢旺旺,等.磷酸铁锂优缺点及改性研究进展[J].无机盐工业201850(6):13-17.
  ZHANG Kejie, CHEN Peng, XIE Wangwang,et al.Progress in modification of lithium iron phosphate and its advantages and disadvantages[J].Inorganic Chemicals Industry201850(6):13-17.
2 梁广川.锂离子电池用磷酸铁锂正极材料[M].北京:科学出版社,2013:288-292.
3 张婷,林森,于建国.磷酸铁锂正极材料的制备及性能强化研究进展[J].无机盐工业202153(6):31-40.
  ZHANG Ting, LIN Sen, YU Jianguo.Research progress in synthesis and performance enhancement of LiFePO4 cathode materials[J].Inorganic Chemicals Industry202153(6):31-40.
4 刘贡钢,叶红齐,刘辉,等.前驱体磷酸铁的制备及其对磷酸
  铁锂电化学性能的影响[J].应用化工201342(2):225- 228.
  LIU Gonggang, YE Hongqi, LIU Hui,et al.Preparation of precursor FePO4 and its effects on electrochemical properties of LiFePO4 [J].Applied Chemical Industry201342(2):225-228.
5 袁静楠.不同晶型磷酸铁的制备及与磷酸亚铁锂间的相互转换关系[D].郑州:郑州大学,2012.
  YUAN Jingnan.Preparation of different crystal forms of iron phosphate and their conversion relationship with lithium ferrous phosphate[D].Zhengzhou:Zhengzhou University,2012.
6 姚停,徐婷,宋磊,等.磷酸铁形貌对磷酸铁锂倍率性能的影响[J].电池202050(1):54-57.
  YAO Ting, XU Ting, SONG Lei,et al.Effects of morphology of ferric phosphate on rate capability of lithium iron phosphate[J].Battery Bimonthly202050(1):54-57.
7 吴康,李军,陈明.乙醇-水体系3D纳/微米球形磷酸铁的制备与表征[J].无机盐工业202052(6):41-45.
  WU Kang, LI Jun, CHEN Ming.Synthesis and characterization of 3D nano/micro spherical iron phosphate in ethanol-water system[J].Inorganic Chemicals Industry202052(6):41-45.
8 马志鸣,肖仁贵,廖霞,等.片层纳米结构磷酸铁制备及对磷酸铁锂电性能的影响[J].材料导报201832(19):3325-3331.
  MA Zhiming, XIAO Rengui, LIAO Xia,et al.Preparation of the lameller nanostructure iron phosphate and its effect on the electrochemical performance of lithium iron phosphate[J].Materials Review201832(19):3325-3331.
9 赵曼.水热法以磷铁制备电池级磷酸铁及改性研究[D].贵阳:贵州大学,2017.
  ZHAO Man.Preparation of battery-grade iron phosphate from ferrophosphorus by hydrothermal method and its modification[D].Guiyang:Guizhou University,2017.
10 严鹏,谢刚,张春明,等.非晶态磷酸铁的沉淀反应机理及性能[J].电池201545(5):241-243.
  YAN Peng, XIE Gang, ZHANG Chunming,et al.Precipitation reaction mechanism and performance of amorphous ferric phosphate[J].Battery Bimonthly201545(5):241-243.
11 张震,蒲薇华,任建国,等.控制结晶法制备球形磷酸铁的团聚尺寸模型[J].化学工程201139(8):20-24.
  ZHANG Zhen, PU Weihua, REN Jianguo,et al.Agglomeration-size model of ferric phosphate spherical particle prepared by controlled crystallization[J].Chemical Engineering(China)201139(8):20-24.
12 李永佳,魏润宏,鲁劲华,等.电池级磷酸铁的制备及性能[J].化工进展202140(4):2227-2233.
  LI Yongjia, WEI Runhong, LU Jinhua,et al.Preparation and performance of FePO4 precursor for LiFePO4 [J].Chemical Industry and Engineering Progress202140(4):2227-2233.
13 郑典模,潘鹤政,伍丽萍,等.超细磷酸铁的制备及其电化学性能研究[J].电源技术201539(1):58-61.
  ZHENG Dianmo, PAN Hezheng, WU Liping,et al.Study on preparation and electrochemical of ultrafine FePO4 [J].Chinese Journal of Power Sources201539(1):58-61.
14 李文升,樊勇利,童书辉,等.高振密球形FePO4·xH2O的合成研究[J].电源技术201337(6):950-952.
  LI Wensheng, FAN Yongli, TONG Shuhui,et al.Synthesis research on iron phosphate with spherical structure and high tap density[J].Chinese Journal of Power Sources201337(6):950-952.
15 ZHANG Tongbao, XIN Dawei, LU Yangcheng,et al.Direct precipitation for a continuous synthesis of nanoiron phosphate with high purity[J].Industrial & Engineering Chemistry Research201453(16):6723-6729.
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