加料方式对合成NCA前驱体中金属离子沉淀率的影响

The Effects of Adding Material Mode on Metal Ion Precipitation Rate in NCA Precursor Synthesis

本实验主要采用的是液相共沉淀法,通过控制其他影响因素不变,用不同的加料方式来合成NCA前驱体物质(Ni_(0.8)Co_(0.2))(OH)_2,收集其残液。火焰原子吸收法测定残液中镍、钴离子的含量。找出最优的加料方式。实验结果表明,(Ni_(0.8)Co_(0.2))(OH)_2的合成中,当所有的原料、沉淀剂以及络合剂一起加入时沉淀率为最大。镍离子沉淀率达到97.7556%,钴离子的沉淀率达到了97.9110%。

The liquid phase co-precipitation method was mainly used in the experiment, the affecting factors which were keep unchanged and the （Ni0.8Co0.2）（OH）2 was synthesize by the different way of adding material, to collect the residual liquid. The content of the remaining nickel and cobalt ions in the residual liquid were determined by flame atomic absorption spectrometry, and finding out the best adding material way. The results showed that the precipitation rate was the biggest when the conditions of synthesizing （Ni0.8Co0.2）（OH）2 keep unchanged but the other way of adding material were changed and all of the raw material, the precipitator atxd complexing agent were added together. The precipitation rate of nickel ion was reached to 97.7556 % and the precipitation rate of cobalt ion was reached to 97.9110 %.