Alleviating the surface degradation of Ni-rich cathode materials is desirable to achieve better electrochemical performance. Herein, we report the surface coating of lithium diborate (Li2O-2B2O3) over the Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode material and the systematic investigation of its electrochemical properties. The structural and morphological properties were characterized through X-ray diffraction (XRD), high resolution field-emission scanning electron microscopy (HR FE-SEM), and high resolution field-emission transmission electron microscopy (HR FE-TEM). As a cathode material for Li-ion batteries, the 1.0 wt% Li2O-2B2O3 coated NCM811 exhibits better electrochemical properties than the bare NCM811 as well as 0.5 and 2 wt% coated electrodes at room and elevated temperatures (60 °C). The improved electrochemical performance of 1.0 wt% Li2O-2B2O3 coated NCM811 might be due to the optimal coating amount that promotes better ion and electron movement along with prevention of surface degradation.

中文翻译：

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锂离子电池LiNi0.8Co0.1Mn0.1O2正极玻璃陶瓷涂层

减轻富镍正极材料的表面降解对于实现更好的电化学性能是可取的。在此，我们报告了二硼酸锂 (Li2O-2B2O3) 在富镍 LiNi0.8Co0.1Mn0.1O2 (NCM811) 正极材料上的表面涂层及其电化学性能的系统研究。通过 X 射线衍射 (XRD)、高分辨率场发射扫描电子显微镜 (HR FE-SEM) 和高分辨率场发射透射电子显微镜 (HR FE-TEM) 表征结构和形态特性。作为锂离子电池的正极材料，1.0 wt% Li2O-2B2O3 涂层 NCM811 在室温和高温 (60 °C) 下表现出比裸 NCM811 以及 0.5 和 2 wt% 涂层电极更好的电化学性能。1.电化学性能的提高