The effect of zirconium oxide coating on the lithium nickel cobalt oxide for lithium secondary batteries
The effect of zirconium oxide coating on the lithium nickel cobalt oxide for lithium secondary batteries
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DOI：
10.1016/j.electacta.2006.01.079
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发表时间：
2006-12
影响因子：
6.6
通讯作者：
Sang Myoung Lee;S. Oh;W. Cho;H. Jang
中科院分区：
文献类型：
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作者：
Sang Myoung Lee;S. Oh;W. Cho;H. Jang
采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和交流阻抗谱(EIS)研究了三种不同包覆工艺(球磨、溶胶-凝胶法、简单研磨)制备的LiNi0.8Co0.2O2涂层的电化学性能。结果表明，氧化锆涂层通过抑制电极-电解液界面的阻抗增长，显著提高了正极的容量保持率，在简单研磨的情况下，其循环性能最好。另一方面，包覆了ZrO2的LiNi0.8Co0.2O2正极的初始容量略有下降。
The electrochemical properties of LiNi0.8Co0.2O2coated with ZrO2by three different coating processes (ball-milling, sol–gel method, simple grinding) were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). Results showed that the ZrO2coating significantly improved the capacity retention of the cathode by suppressing the impedance growth at the interface between electrodes and electrolyte and the best cyclability was obtained in the case of employing the simple grinding for the ZrO2coating. On the other hand, the initial capacities of the ZrO2-coated LiNi0.8Co0.2O2cathode were slightly decreased.