Zr掺杂对高电压镍钴锰酸锂性能影响的试验研究

Experimental Study on the Effect of Zr Doping on the Performance of High Voltage Nickel Lithium Cobalt Oxide

摘要: 本试验主要借助高温固相法来合成523镍钴锰三元材料，通过研究时间、温度以及Zr掺杂量对性能的影响，找出最佳的工艺条件。由试验数据进行对比和分析可以看出：当掺杂锆含量为0.7%，烧结时间为10小时，烧结温度为920℃时，镍钴锰酸锂三元材料的性能是最佳的。其主要性能指标为：振实密度TD2.93 g∙cm⁻³，粒度D50为7.52 um，PH值为11.33，1.0 C初始容量为174.37 mAh∙g⁻¹，循环50次容量为171.34 mAh∙g⁻¹，50次容量保持率为98.26%。本试验结果对镍钴锰酸锂三元材料制备具有一定的参考意义。

Abstract: In this experiment, 523 nickel cobalt manganese three element materials were synthesized by high temperature solid-state method. By studying the effects of time, temperature and Zr doping on the properties, we find the best technological conditions. The comparison and analysis of the experimental data shows that when the content of zirconium is 0.7%, the sintering time is 10 hours, and when the sintering temperature is 920 degrees, the performance of nickel cobalt lithium manganite is the best. The main performance indexes are as follows: the vibratory density TD is 2.93 g∙cm⁻³, the particle size D50 is 7.52 um, the pH value is 11.33, the initial capacity of 1.0 C is 174.37 mAh∙g⁻¹, the 50 cycle capacity is 171.34 mAh∙g⁻¹, and the 50 capacity retention rate is 98.26%. The experimental results have some reference value for the preparation of nickel cobalt lithium manganate three element materials.