Effects of Ag coating on the structural and electrochemical properties of LiNi0.8Co0.1Mn0.1O2 as cathode material for lithium ion batteries
By Sun, Huilan; Zhang, Yafei; Li, Wen; Zhang, Di; Wang, Qiujun; Wang, Bo
Published in Electrochimica Acta
2019
Abstract
Ni-rich layered oxide LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode materials are synthesized using Ni0.8Co0.1Mn0.1(OH)2 precursors obtained from a co-precipitation reaction and then coated with of metal Ag for the first time. X-ray diffraction results verify that Ag+ ions can hardly dope into the bulk NCM811 particles and the ion mixing degree of Li+/Ni2+ has been reduced. Amorphous Ag coating layers formed on the surface of Ag coated NCM811 materials are proved by scanning electron microscope and transmission electron microscope. X-ray photoelectron spectroscopy demonstrates that more Ni3+ ions on the surface of Ag coated NCM811 materials than that of pure NCM811. Galvanostatic charge-discharge tests indicate that 1 wt% Ag coated NCM811 exhibits initial discharge capacity of 209.1 mAh
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