Rheological Phase Synthesis and Electrochemical Properties of Mg-Doped LiNi0.8Co0.2O2 Cathode Materials for Lithium-Ion Battery
Rheological Phase Synthesis and Electrochemical Properties of Mg-Doped LiNi0.8Co0.2O2 Cathode Materials for Lithium-Ion Battery
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DOI：
10.1149/1.2917213
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发表时间：
2008-07
影响因子：
3.9
通讯作者：
Jiangfeng Xiang;Caixian Chang;Feng Zhang;Ju-tang Sun
中科院分区：
文献类型：
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作者：
Jiangfeng Xiang;Caixian Chang;Feng Zhang;Ju-tang Sun
通过流变相反应路线合成了LiNi 0.8 Co 0.2 O 2 和Mg掺杂的LiNi 0.8 Co 0.2 O 2 。使用激光散射测量获得粒度分布。通过扫描电子显微镜观察形态特征。电化学测试表明，与未掺杂的样品相比，Mg掺杂的LiNi 0.8 Co 0.2 O 2 表现出更高的容量、循环稳定性和倍率性能。还通过循环伏安法和电化学阻抗谱对样品进行了表征。此外，基于缺陷反应讨论了镁掺杂的可能机制。
LiNi 0.8 Co 0.2 O 2 and Mg-doped LiNi 0.8 Co 0.2 O 2 have been synthesized via the rheological phase reaction route. The particle size distribution is obtained using laser scattering measurements. The morphological features are observed by a scanning electron microscope. Electrochemical tests show that the Mg-doped LiNi 0.8 Co 0.2 O 2 exhibits an improved capacity, cycling stability, and rate performances compared to undoped samples. The samples are also characterized by cyclic voltammetry and electrochemical impedance spectroscopy. Furthermore, possible mechanisms of Mg-doping are discussed based on the defect reaction.