| 275 | 0 | 51 |
| 下载次数 | 被引频次 | 阅读次数 |
四氧化三钴是锂离子电池正极材料钴酸锂的关键原料。本研究旨在通过优化洗涤脱硫工艺，降低四氧化三钴中的硫含量(质量分数)，以提高钴酸锂的电化学性能。文中分别探究了纯水、碳酸氢铵溶液及氢氧化钠溶液的洗涤脱硫效果，确定了三种洗涤液的最佳工艺条件。在此条件下，四氧化三钴中硫含量可分别控制在2×10-4、1×10-4和1×10-5以内，且不会引起粒度分布和微观形貌的改变。
Abstract：Cobalt tetraoxide(Co3O4) is a key raw material for lithium cobalt oxide(LiCoO2),an anode material for lithium-ion batteries.The aim of this study is to reduce the sulfur content(mass fraction) in cobalt tetraoxide by optimizing the washing and desulfurization process in order to improve the battery performance.Through the experimental study,the washing and desulfurization effects of pure water,ammonium bicarbonate solution and sodium hydroxide solution were investigated,and the optimal process conditions for washing with the three kinds of washing liquids were determined.Under these conditions,the sulfur content of tricobalt tetraoxide could be controlled within 2×10-4,1×10-4 and 1×10-5 respectively,and would not cause the change of the particle size distribution and the microscopic morphology.
[1]蒋学先,贾喜君,何贵香.湿化学方法合成LiCoO_2的研究进展[J].湖南有色金属,2007,23(5):34-36,76.
[2]李永光,刘更好,范伟城,等.液相制备高振实密度的小粒径球形碳酸钴[J].电池工业,2019,23(2):87-91.
[3]刘人生,王丽平,秦鸣飞,等.液相沉淀-煅烧法制备大粒径球形四氧化三钴[J].精细化工,2019,36(2):206-211.
[4]HUANG G Y,XU S M,LU S S,et al.Micro-/nanostructured Co_3O_4 anode with enhanced rate capability for lithium-ion batteries[J].ACS Applied Materials&Interfaces,2014,6(10):7236-7243.
[5]GAO J Z,ZHAO Y C,YANG W,et al.Sol-gel preparation and characterization of Co_3O_4 nanocrystals[J].Journal of University of Science and Technology Beijing(English Edition),2003,10(1):54-57.
[6]XU W W,CUI X D,XIE Z Q,et al.Integrated Co_3O_4/TiO_2 composite hollow polyhedrons prepared via cationexchange metal-organic framework for superior lithiumion batteries[J].Electrochimica Acta,2016,222:1021-1028.
[7]XU Y Y,LIU Z Y,CHEN D,et al.Synthesis and electrochemical properties of porous a-Co(OH)_2 and Co_3O_4microspheres[J].Progress in Natural Science:Materials International,2017,27(2):197-202.
[8]王伟东,仇卫华,丁倩倩,等.锂离子电池三元材料:工艺技术及生产应用[M].北京:化学工业出版社,2015.
[9]邱天,王娟,沈震雷,等.镍钴铝酸锂前驱体Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2洗涤降硫工艺[J].电源技术,2019,43(2):191-193,228.
[10]王伟东,杨凯,关豪元,等.三元材料前驱体-产线设计及生产应用[M].北京:化学工业出版社,2020.
[11]GUO H J,LI Q H,HE F Y,et al.The role of sulfate ions coming from source materials on the properties of Li_(1.05)Mn_2O_4 cathode for lithium ion batteries[J].Materials Chemistry and Physics,2010,124(2/3):922-926.
[12]GUO M M,XI X L,LI S,et al.Preparation of smallparticle and high-density cobalt carbonate using a continuous carbonate precipitation method and evaluation of its growth mechanism[J].Materials,2019,12(20):3394.
[13]胡福增.材料表面与界面[M].上海:华东理工大学出版社,2008.
[14]吴旭冉,贾志军,马洪运,等.电化学基础(Ⅲ):双电层模型及其发展[J].储能科学与技术,2013,2(2):152-156.
[15]陈深培,林庆绪,韦华磊,等.煅烧温度对四氧化三钴颗粒成型理化指标调控的影响[J].广东化工,2023,50(21):49-52.
[16]段雪,张法智.插层组装与功能材料[M].北京:化学工业出版社,2007.
基本信息:
DOI：10.19996/j.cnki.ChinBatlnd.2025.06.010
中图分类号:TQ138.12;TM912
引用信息:
[1]陆从理,李智超,马源,等.钴酸锂前驱体四氧化三钴洗涤降硫工艺[J].电池工业,2025,29(06):501-505.DOI:10.19996/j.cnki.ChinBatlnd.2025.06.010.
2024-10-14
2024
2024-12-16
2024
1
2024-12-17
2024-12-17
2024-12-17