The invention provides a lithium-rich manganese-based coated positive electrode material and a preparation method and application thereof, the lithium-rich manganese-based coated positive electrode material comprises a positive electrode active material, and the surface of the positive electrode active material is discontinuously coated with a lithium-rich manganese-based lithium supplementing material; the lithium-rich manganese-based lithium-supplementing material is uniformly and discontinuously coated on the surface of the positive active material before homogenization, so that the problem that the lithium-rich manganese-based lithium-supplementing material is easy to disperse unevenly in the homogenization process can be solved from the material end, the lithium-supplementing effect of the lithium-rich manganese-based lithium-supplementing material can be fully exerted, normal de-intercalation of lithium ions and electrons cannot be hindered, and the lithium-rich manganese-based lithium-supplementing material can be used as a lithium-rich manganese-based lithium-supplementing material. And more lithium ion migration channels are provided for the whole material, so that the lithium ion battery containing the lithium-manganese-based coated positive electrode material has excellent cycle performance and rate capability.
本发明提供一种富锂锰基包覆正极材料及其制备方法和应用,所述富锂锰基包覆正极材料包括正极活性物质,所述正极活性物质表面不连续包覆有富锂锰基补锂材料;将富锂锰基补锂材料在匀浆前均匀且不连续的包覆在正极活性物质表面,可以从材料端解决富锂锰基补锂材料在匀浆过程中容易分散不均的问题,有助于充分发挥富锂锰基补锂材料的补锂作用,且不会阻碍锂离子和电子的正常脱嵌,还为整体材料提供了更多的锂离子迁移通道,使得包含所述锂锰基包覆正极材料的锂离子电池兼具优异的循环性能和倍率性能。
Lithium-rich manganese-based coated positive electrode material as well as preparation method and application thereof
一种富锂锰基包覆正极材料及其制备方法和应用
2023-08-25
Patent
Electronic Resource
Chinese
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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