The invention discloses a lithium-rich manganese-based composite positive electrode material and a preparation method and application thereof. The lithium-rich manganese-based composite positive electrode material comprises an inner core and a coating layer, wherein the inner core comprises a lithium-rich manganese-based positive electrode material, the coating layer coats the inner core, and thecoating layer comprises samarium phosphate. The lithium-rich manganese-based composite positive electrode material has the advantages of high initial efficiency, good rate capability and stable cycleperformance. Therefore, a solid-state battery prepared from the lithium-rich manganese-based composite positive electrode material is good in electrochemical performance; and the advantages of high specific capacity and high working voltage of the lithium-rich manganese base and high safety, high energy density, wide electrochemical window and the like of the solid-state battery are combined, so that a vehicle loaded with the solid-state battery has excellent endurance, long cycle life and high safety.

    本发明公开了一种富锂锰基复合正极材料及其制备方法和应用,其中,所述富锂锰基复合正极材料包括:内核和包覆层,所述内核包括富锂锰基正极材料,所述包覆层包覆在所述内核的表面上,并且所述包覆层包括磷酸钐。该富锂锰基复合正极材料具有首次效率高、倍率性能好以及循环性能稳定的优点。由此,采用该富锂锰基复合正极材料而制作的固态电池电化学性能好,且结合了富锂锰基的高比容量、高工作电压和固态电池的高安全性、高能量密度以及电化学窗口宽等优点,从而使得装载该固态电池的车辆具有优异的续航能力、长循环寿命和高安全性。


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    Title :

    Lithium-rich manganese-based composite positive electrode material and preparation method and application thereof


    Additional title:

    富锂锰基复合正极材料及其制备方法和应用


    Contributors:
    DENG CHENG (author) / QIU ZHAOZHENG (author) / LIANG SHISHUO (author)

    Publication date :

    2020-11-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    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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