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Improvement of Electrochemical Performance of Li[Ni<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>]O<sub>2</sub> Cathode Materials by AlF<sub>3</sub> coating at Various Temperatures
67
Citations
21
References
2008
Year
EngineeringElectrode-electrolyte InterfaceChemistryDifferential CapacityChemical EngineeringVarious TemperaturesThin Alf3 LayerMaterials ScienceBattery Electrode MaterialsAdvanced Electrode MaterialLithium-ion BatteryElectrochemical PerformanceEnergy StorageSolid-state BatteryElectrochemical ProcessElectrochemistryElectrochemical Impedance SpectroscopyLi-ion Battery MaterialsCathode MaterialsElectrochemical Energy StorageBatteries
A thin AlF3 layer of ∼10 nm was uniformly coated on the particle surface of Li[Ni0.8Co0.15Al0.05]O2. The AlF3 coating improved cycle performance at 55, 30, and –10 °C and improved storage characteristics at 60 °C. In studies of differential capacity (dQ/dV) versus voltage, the AlF3-coated Li[Ni0.8Co0.15Al0.05]O2 showed little variation in redox peaks with cycling. Electrochemical impedance spectroscopy suggested that the AlF3 coating played an important role in stabilizing the interface between the cathode and the electrolyte.
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