低热固相合成锂离子电池正极材料磷酸钴锂

Synthesis of Lithium Cobalt Phosphate as Cathode Material for Lithium Ion Batteries via Low-Heating Solid-State Reaction

以CoCl2.6H2O和LiH2PO4为原料,聚乙二醇-400为模板剂,掺入少量MnSO4.H2O,用无水Na2CO3中和,80℃保温6 h,用水洗去可溶性无机盐,100℃烘干,600℃灼烧2 h,得到锂离子电池电极材料磷酸钴锂。用XRDI、R、SEM等对产物进行了分析表征,证明产物为LiCoPO4纳米晶体,平均粒径约为36.5 nm,属Orthorhombic晶系,Pmnb(62)空间群,Z=4,晶胞参数a=5.922°A,b=10.206A°,c=4.701A°。

The crystalline LiCoPO4 wss prepared in the presence of surfactant PEG-400 with fully ground CoCl2 · 6H2O and LiH2PO4 as raw materials by solid - state reaction at room temperature, at the same time, mixed with a little of MnSO4· H2O, then neutralized the mixture by NaECO3. The reaction mixtures were aged at 80℃ for 6 h, then washed with water to remove soluble inorganic salts and dried it under 100℃, heated it for 2h under 600℃, finally the lithium battery electrode material lithium cobalt phosphate was obtained. The product was analyzed by XRD, IR and SEM, and the results showed that the product was the nanoscale transistors , its molecular formula was LiCoPO4, average particle size was 36.5 nm. Scaned by scanning electron microscope, it determined that its syngony was Orthorhombic and space group was Pmnb （62）, Z = 4, cell parameters were a = 5.922A, b = 10.206A, c = 4.701A.