Enhanced electrochemical performances of Li 1.2 Ni 0.2 Mn 0.6 O 2 cathode materials by coating LiAlO 2 for lithium-ion batteries
Source abstract
Abstract
Abstract LiAlO 2 -coated Li 1.2 Ni 0.2 Mn 0.6 O 2 lithium-rich layered oxide was prepared and investigated as cathode material for lithium-ion batteries. X-ray diffraction (XRD) and high resolution transmission electron microscopy (HR-TEM) analyses revealed that a uniform LiAlO 2 layer was coated on the surface of Li 1.2 Ni 0.2 Mn 0.6 O 2 particles. The LiAlO 2 -coated Li 1.2 Ni 0.2 Mn 0.6 O 2 exhibited a great improvement on electrochemical performance, especially for its excellent cycling stability both at room and elevated temperature, compared to the pristine Li 1.2 Ni 0.2 Mn 0.6 O 2 . In addition, the LiAlO 2 -coated Li 1.2 Ni 0.2 Mn 0.6 O 2 showed obviously enhanced rate capability (162.6 mA h g −1 at 2 C and 112.3 mA h g −1 at 5 C) and suppressed the voltage fading during long-term and high-rate cycling. Based on these results, LiAlO 2 coating would be a promising method to improve the electrochemical performance of lithium-rich layered oxides.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies
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