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- W2791570596 abstract "Ni-rich layered materials have been regarded as competitive candidates for advanced lithium-ion batteries due to their high energy density, relatively low cost and environmentally-friendly nature. However, they suffer from serious degradation of cycling performance after exposing to air during their storage. Here we selected LiNi0.8Co0.1Mn0.1O2 as a typical Ni-rich positive material to study the influence upon exposure to ambient air on surface chemical composition and electrochemical performance. TEM confirms the existence of amorphous surface layer after contacting with atmosphere and the thickness is about 3-4 nm. The fresh LiNi0.8Co0.1Mn0.1O2 sample has capacity retention of 94.6% and 93.3% after 50 cycles at 0.2C and 1C, respectively, comparing to the 91.7% and 82.4% of the exposed sample. The charge-discharge curves and electrochemical impedance spectra indicate that exposure to air lead to increased impedance and polarization, which seriously affects LiNi0.8Co0.1Mn0.1O2 cycling properties. So, it is very important for Ni-rich cathode materials without contacting with atmosphere directly." @default.
- W2791570596 created "2018-03-29" @default.
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- W2791570596 date "2018-01-01" @default.
- W2791570596 modified "2023-09-25" @default.
- W2791570596 title "Influence of Atmosphere on Electrochemical Performance of LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> Electrodes for Li-Ion Batteries" @default.
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- W2791570596 doi "https://doi.org/10.1088/1757-899x/301/1/012039" @default.
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