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Composite material and preparation method thereof
The invention relates to the technical field of battery materials, in particular to a composite material and a preparation method thereof. The composite material comprises an oxide solid electrolyte and a lithium halide coating layer coating the surface of the oxide solid electrolyte. The lithium halide coating layer not only can enhance the stability of the oxide solid-state electrolyte to air and prevent LiOH and Li2CO3 pollutants from being generated on the surface of the oxide solid-state electrolyte, but also can enhance the wettability of the oxide solid-state electrolyte to lithium metal, so that the interface impedance is reduced, meanwhile, the deposition of lithium ions in the oxide solid-state electrolyte can be inhibited, and the service life of the oxide solid-state electrolyte is prolonged. The growth of lithium dendrites is prevented; therefore, when the composite material is used as a solid electrolyte for a lithium ion battery, the cycle life of the battery can be prolonged, and the composite material has a very good application prospect.
本申请涉及电池材料技术领域，尤其涉及一种复合材料及其制备方法。该复合材料包括氧化物固态电解质以及包覆在所述氧化物固态电解质表面的卤化锂包覆层。该卤化锂包覆层不仅可以增强氧化物固态电解质对空气的稳定性，防止氧化物固态电解质表面生成LiOH和Li2CO3污染物，还能增强氧化物固态电解质对锂金属的润湿性，从而减小界面阻抗，同时还可以抑制锂离子在氧化物固态电解质内部沉积，阻止锂枝晶生长；因此，将该复合材料作为固态电解质用于锂离子电池可以延长电池循环寿命，具有很有的应用前景。
Composite material and preparation method thereof
The invention relates to the technical field of battery materials, in particular to a composite material and a preparation method thereof. The composite material comprises an oxide solid electrolyte and a lithium halide coating layer coating the surface of the oxide solid electrolyte. The lithium halide coating layer not only can enhance the stability of the oxide solid-state electrolyte to air and prevent LiOH and Li2CO3 pollutants from being generated on the surface of the oxide solid-state electrolyte, but also can enhance the wettability of the oxide solid-state electrolyte to lithium metal, so that the interface impedance is reduced, meanwhile, the deposition of lithium ions in the oxide solid-state electrolyte can be inhibited, and the service life of the oxide solid-state electrolyte is prolonged. The growth of lithium dendrites is prevented; therefore, when the composite material is used as a solid electrolyte for a lithium ion battery, the cycle life of the battery can be prolonged, and the composite material has a very good application prospect.
本申请涉及电池材料技术领域，尤其涉及一种复合材料及其制备方法。该复合材料包括氧化物固态电解质以及包覆在所述氧化物固态电解质表面的卤化锂包覆层。该卤化锂包覆层不仅可以增强氧化物固态电解质对空气的稳定性，防止氧化物固态电解质表面生成LiOH和Li2CO3污染物，还能增强氧化物固态电解质对锂金属的润湿性，从而减小界面阻抗，同时还可以抑制锂离子在氧化物固态电解质内部沉积，阻止锂枝晶生长；因此，将该复合材料作为固态电解质用于锂离子电池可以延长电池循环寿命，具有很有的应用前景。
Composite material and preparation method thereof
复合材料及其制备方法
2022-05-06
Patent
Electronic Resource
Chinese
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