期刊论文

Impact Factors on Morphology and Particle Size of Lithium Vanadium Phosphate during Solvothermal Synthesis

中文

广州化工

1001-9677

2019

47

20

55-58

10.3969/j.issn.1001-9677.2019.20.024

国家自然科学基金（51703061） 湖南省自然科学基金（2017JJ3103） 中国博士后科学基金（2016M592427）

本校为第一机构

Li3V2(PO4)3因其突出的理论比容量和较高的工作电压,被认为是极具应用潜力的新一代锂离子电池正极材料之一.本实验以LiOH,NH4H2PO4和NH4VO3为反应原料,通过溶剂热法合成Li3V2(PO4)3(LVP)正极材料.探讨了原料的添加顺序,溶剂的种类和比例,反应温度以及保温时间对LVP形貌和粒径的影响.利用扫描电镜观察其形貌和粒径,采用X射线衍射仪表征其晶体结构.实验结果表明:所用溶剂对LVP材料的结构和形貌有显著影响.当选择乙二醇与水混合物(EG:H2 O=1:1)作溶剂,在200℃下反应6 h时,可获得粒径小而均匀的LVP微球.

Li3V2 (PO4)3 has attracted extensive interest as one of the most promising cathode materials for lithium-ion batteries due to its remarkable theoretical capacity and high operating voltage. Li3V2(PO4)3 (LVP) was synthesized by using LiOH, NH 4H 2PO 4 and NH4VO3 as reaction materials through solvothermal method. To investigate the impact factors on the morphology and particle size of Li3V2 (PO4)3 during solvothermal synthesis, the category and ratio of solvent, the adding sequence of raw materials and the temperature, as well as the reaction dur...