Effects of fast lithium-ion conductive coating layer on the nickel rich layered oxide cathode material
Source abstract
Abstract
Abstract In this study, a series of ultra-thin fast ionic conductor (Li3PO4, Li2ZrO3, Li4Ti5O12) layers were successfully deposited on the surface of LiNi0.8Mn0.1Co0.1O2. The effects of three typical ionic conductors were systemically compared for the first time. The influences of coating layers on the microstructures and electrochemical properties of the cathode material were investigated by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), high-resolution transmission electron spectroscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and electrochemical tests. Analysis indicated that the coating layers existed on the surface of the cathode material and did not cause any noticeable change in the crystal structure. Electrochemical tests proved that all the surface-modified samples exhibited excellent cycling performance and rate capability compared to the bared sample. The inferior electrochemical performances of the bared sample were related to the formation of thick solid-electrolyte inter-facial layer during cycling, while the coating layer could minimize the side-reactions between the cathode and electrolyte during cycling. The electrons transfer and Li+ diffusion coefficient of the Li3PO4 coated sample were superior to that of Li2ZrO3 and Li4Ti5O12 coated samples, which were beneficial to the rate capability of LiNi0.8Mn0.1Co0.1O2.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research
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