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首页> 外文期刊>Physical chemistry chemical physics: PCCP >The synergistic effect of inert oxide and metal fluoride dual coatings on advanced cathode materials for lithium ion battery applications
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The synergistic effect of inert oxide and metal fluoride dual coatings on advanced cathode materials for lithium ion battery applications

机译：惰性氧化物和金属氟化物双重涂层对锂离子电池应用高级阴极材料的协同作用

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摘要

The effect of Al2O3/LiF dual coatings on the electrochemical performance of over-lithiated layered oxide (OLO) has been investigated. A uniform coating of Al2O3 and LiF is obtained on the surface of the layered pristine material. The OLO with a dual Al2O3/LiF coating with a ratio of 1 : 1.5 exhibits excellent electrochemical performance. An initial discharge capacity of 265.66 mA h g(-1) is obtained at a C-rate of 0.1C. This capacity is approximately 15 mA h g(-1) higher than that of pristine OLO. The capacity retention ( 92.8% at the 50th cycle) is also comparable to that of pristine OLO ( 91.4% at the 50th cycle). Coating the cathode with a dual layer comprising Al2O3 and LiF leads to improved charging and discharging kinetics, and prevents direct contact between the cathode and the electrolyte.
机译：研究了Al2O3 / LiF双重涂层对过锂化层状氧化物（OLO）电化学性能的影响。在层状原始材料的表面上获得了均匀的Al2O3和LiF涂层。具有比例为1：1.5的Al2O3 / LiF双涂层的OLO表现出出色的电化学性能。在0.1C的C速率下可获得265.66 mA h g（-1）的初始放电容量。该容量比原始OLO高约15 mA h g（-1）。容量保持率（第50个周期为92.8％）也与原始OLO（第50个周期为91.4％）相当。用包含Al2O3和LiF的双层涂覆阴极可改善充电和放电动力学，并防止阴极和电解质直接接触。

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