期刊论文

Study on properties of dually modified ternary cathode materials

中文

现代化工

0253-4320

2024

1

120-125

国家自然科学基金(51604042,51874048) 长沙市科技重大专项(kh2003021)。

本校为第一机构

为提高三元正极材料LiNi0.5Co0.2Mn0.3O2(NCM523)的可逆比容量和循环稳定性,通过表面包覆聚并苯(PAS)复合钾...展开更多 为提高三元正极材料LiNi0.5Co0.2Mn0.3O2(NCM523)的可逆比容量和循环稳定性,通过表面包覆聚并苯(PAS)复合钾氯共掺杂对NCM523材料进行双重改性,利用XRD､SEM､TEM等分析方法和恒电流充放电性能测试,研究了不同PAS包覆量复合K､Cl共掺杂NCM523材料的结构､形貌和电化学性能。结果表明,2%PAS包覆复合1%K和Cl共掺的NCM523材料在0.1 C首次放电容量为209.5 mAh/g;1 C倍率下充放电循环100次后放电容量保持率比未改性的NCM523提高了19%;5 C倍率下的放电比容量为158.1 mAh/g,比未改性...

In order to improve the reversible specific capacity and the cycling stability of LiNi0.5Co0.2Mn0.3O2(NCM523),it is dually modified through coated with polyacene(PAS)and co-doped with potassium and chloride.The structure,morph...MORE In order to improve the reversible specific capacity and the cycling stability of LiNi0.5Co0.2Mn0.3O2(NCM523),it is dually modified through coated with polyacene(PAS)and co-doped with potassium and chloride.The structure,morphology,and electrochemical properties of NCM523,which are coated with different amounts of ...