期刊论文

Effect of Aluminum Doping on the Structure and Electrochemical Properties of Cobalt Free Cathode LiNi0.90Mn0.10O2

中文

南华大学学报(自然科学版)

1673-0062

2022

36

3

89-97

10.19431/j.cnki.1673-0062.2022.03.013

11875164:国家自然科学基金 :国防科工局核设施退役 JSZL2019403C001:放射性废物处理项目 2019SK2011:湖南省重点领域研发计划资助项目

本校为第一机构

采用共沉淀法将质量分数3％的Al取代Mn掺入二元Ni0.90 Mn0.10 OH2前驱体中,经高温固相烧结合成一种无Co高Ni三元正极LiNi0.90 Mn0.07 Al0.03 O2,并通过X射线衍射(X ray diffraction,XRD)、扫描电子显微镜(scanning electron microscope,SEM)、能量弥散射线谱(energy dispersive spectroscopy,EDS)等表征手段进行分析,探讨了Al3+掺杂对材料结构及性能的影响.结果表明,引入Al3+后,Ni0.90 Mn0.07 Al0.03 OH2一次颗粒明显变细,对应LiNi0.90 Mn0.07 Al0.03 O2结晶度明显提高.在25℃、3.0～4.3 V下充放电,掺杂材料的0.1C比容量为191.3 mAh/g,高于未掺杂材料的181.5 mAh/g;0.5 C循环90次的容量保持率为...

In this paper,the co-precipitation method was used to insert 3%Al substituted Mn into binary Ni0.90Mn0.10OH2precursor,and a kind of high Ni ternary cathode LiNi0.90Mn0.07Al0.03O2without Co was synthesized by high temperature solid-phase sintering,and analyzed by X Ray Diffraction(XRD),Scanning Electron Microscope(SEM),Energy Dispersive Spectroscopy(EDS)and other characterization methods.The influence of Al3+doping on the structure and properties of the materials was discussed.The results showed that the Ni0.90Mn0.07Al0.03OH2particles became fin...