前驱体合成温度对高镍正极LiNi0.91Co0.06Al0.03O2性能的影响

被引：0

作者：

张诚

寇亮

牛瑶

徐可

张超

机构：

[1] 陕西煤业化工技术研究院有限责任公司

来源：

电源技术 | 2021年 / 45卷 / 03期

关键词：

高镍正极材料; 前驱体合成温度; LiNi0.91Co0.06Al0.03O2;

D O I：

暂无

中图分类号：

TQ131.11 []; TM91 [独立电源技术（直接发电）];

学科分类号：

摘要：

高镍正极材料具备高的能量密度和低的原料成本,被认为是极具前景的动力电池材料。高镍正极材料的容量和循环性能非常依赖于其氢氧化物前驱体的物化性能。但是,正极材料与对应前驱体的关联性研究相对较少。报道了LiNi0.91Co0.06Al0.03O2前驱体的合成温度（50～70℃）对前驱体物化性能及对应正极材料的总体性能的影响。测试结果证明前驱体的共沉淀温度为60℃时,对应的LiNi0.91Co0.06Al0.03O2正极材料具备好的结晶度和均匀的一次晶粒分布,表现出最优异的电化学性能,0.1 C下该高镍正极材料表现出217 mAh/g的初始放电比容量,1C下循环50圈的容量保持率为93.1%。同时,该温度下制备的前驱体对应的正极材料具备优异的热稳定性,其放热峰值温度为212.5℃,放热量为1 574 J/g。该研究证明了前驱体合成温度对正极材料性能的影响,为高镍正极材料工艺优化提供了指导性意见。

引用

页码：282 / 285

页数：4

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