介电谱
材料科学
兴奋剂
扫描电子显微镜
电化学
阴极
能量色散X射线光谱学
极化(电化学)
化学工程
分析化学(期刊)
核化学
复合材料
化学
电极
色谱法
物理化学
光电子学
工程类
作者
Mingyu Zhang,Chaoyong Wang,Junkai Zhang,Gang Li,Li Gu
出处
期刊:ACS omega
[American Chemical Society]
日期:2021-06-15
卷期号:6 (25): 16465-16471
被引量:24
标识
DOI:10.1021/acsomega.1c01552
摘要
LiNi0.8Co0.1Mn0.1O2 (NCM811) became a research hot point because of its low cost, environmental friendliness, and excellent electrochemical performance. However, Li+/Ni2+ intermixing is an essential factor affecting its applicability. Doping could be an important method to improve the electrochemical performance of NCM811-based cathode materials. In this work, La and Al co-doped NCM811 was prepared by a solid-state method. Results from X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) and electrochemical performance were discussed in depth. These showed that when La and Al doping concentrations were 1 and 0.5%, the samples showed the best performance. The as-improved performances were mainly attributed to the reduced Li+/Ni2+ intermixing, suppressed phase transition, and decreased potential polarization and impedance.
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