固相反应合成掺铜磷酸锌锂

以ZnSO₄·7H₂O, (NH₄)₃PO₄·₃H₂O为原料, 硫酸铜为掺杂剂, 以PEG-400为表面活性剂, 经低热固相反应合成得到掺铜磷酸锌铵. 接着以PEG-400为表面活性剂, 用掺铜磷酸锌铵与Li₂CO₃经室温固相反应得到前驱体, 然后在700℃下煅烧前驱体, 得到锂电池电极材料掺铜磷酸锌锂纳米晶. 用产物XRD图谱数据计算得到的信噪比作为实验的考察指标, 实验中应用了均匀设计实验法及数据挖掘技术, 在数据挖掘成果的指导下进行了实验. 结果表明, 产物的信噪比随着掺杂铜离子的增加而直线增加. 用最优工艺条件合成的产物为50 nm的掺铜LiZnPO₄, 信噪比为30.41, 与数据挖掘得到的最佳结果相吻合, 表明应用固相合成法制备掺铜磷酸锌锂及把信噪比作为一种指标去控制合成结果是可行的.

Synthesis of Cu~(2+)-doped lithium zinc phosphate via solid state reaction

Cu²⁺-doped lithium zinc phosphate used as electrode material of lithium batteries was studied, and the target product was got successfully after baking the noncrystalline precursor of the compound at 700℃. The precursor was prepared with Cu²⁺-doped ammonium zinc phosphate, Li₂CO₃ and surfactant PEG-400 via solid state reaction at room temperature, in which the Cu²⁺-doped ammonium zinc phosphate was synthesized with ZnSO₄•7H₂O, (NH₄)₃PO₄•_³H₂O as start materials and PEG-400 as surfactant via low heat solid state reaction. Signal-to-noise rate (SNR) calculated with XRD data of the products was used as a testing index, and uniform experimental design as well as data mining technology were applied in the test. The synthesis tests were done under the direction of data mining technology. The test results indicated that SNR of the products increased linearly with increase of Cu²⁺ doped. The product synthesized under the optimal technical condition was Cu²⁺- doped LiZnPO₄ with size of 50 nm and SNR of 30.41 that inosculate with the optimization results of data mining. This paper shows that it is feasible to prepare Cu²⁺-doped LiZnPO₄ via solid state reaction and to control the synthesis results with SNR of the products as a testing index.