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- W2279656248 abstract "Abstract In this work, spinel LiNi0.5Mn1.5O4 (LNMO) hollow microspheres are synthesized by an impregnation method using microsphere MnO2 as both the precursor and template. To enhance the electrical conductivity of LNMO, metal Al was employed for the first time as a coating material for LNMO. Though an Electron-beam Vapor Deposition approach, the surface of LNMO can be easily coated by a tight layer of Al nanoparticles with adjusted thickness. Further annealing the Al-coated sample at 800 °C in air, the Al3+-doped LNMO can be obtained. The effects of Al-coating and Al3+-doping on the sample morphology and structure are investigated by SEM, TEM, XRD and FT-IR. The electrochemical properties of Al-coated LNMO and Al3+-doped LNMO are measured with comparison of bare LNMO by charge/discharge tests and electrochemical impedance spectroscopy (EIS). The results show that both Al-coating and Al3+-doping can greatly enhance the cycle performance and rate capability of LNMO. Especially for Al-coated LNMO, it shows the lowest battery impedance due to the existence of conductive Al coating layer, thus delivers the best rate performance among the three. The physical coating procedure used in this work may provide a new facile modification approach for other cathode materials." @default.
- W2279656248 created "2016-06-24" @default.
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- W2279656248 date "2016-02-01" @default.
- W2279656248 modified "2023-10-16" @default.
- W2279656248 title "High performance LiNi0.5Mn1.5O4 cathode by Al-coating and Al3+-doping through a physical vapor deposition method" @default.
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- W2279656248 doi "https://doi.org/10.1016/j.electacta.2016.01.087" @default.
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