The invention relates to a positive electrode active material for a sodium ion battery, a sodium ion battery prepared from the active material, a battery module, a battery pack and a device. The positive electrode active material for the sodium ion battery mainly comprises an O3-phase layered metal oxide, the O3-phase layered metal oxide has the following molecular formula: NaaMbNicFedMneO2 +/-delta (formula I), in the formula I, M is a metal cation different from Ni, Fe and Mn; 0.67 lt; 0.67 lt; a < lt >; 1.1; 1.1; 0 lt; blt; 0.25, preferably 0.05 lt; blt; 0.15, 0.15; 0 lt; clt; ct; 0.3, preferably 0.05 lt; clt; ct; 0.25%; 0 lt; b + clt; 0.55% of the total weight; 0.45 lt, 0.45 lt; d + ilt; 1; b + c + d + e = 1; 0 < = delta < = 0.1, and the metal cation is selected from one of Li < + >, Cu < 2 + >, Zn < 2 + >, Co < 2 + > and Ti < 4 + >; i (003)/I (104) of the O3-phase layered metal oxide in an X-ray diffraction spectrum is greater than or equal to 0.7 and is not higher than 1.2, I (003) represents the (003) crystal face peak intensity of the O3-phase layered metal oxide, I (104) represents the (104) crystal face peak intensity of the O3-phase layered metal oxide, and I (003)/I (104) reflects the mixing degree of sodium metal cations in the O3-phase layered metal oxide.

    本申请涉及钠离子电池用正极活性材料、由该活性材料制成的钠离子电池、电池模块、电池包及装置。所述钠离子电池用正极活性材料主要包含O3相层状金属氧化物,所述O3相层状金属氧化物具有如下分子式:NaaMbNicFedMneO2±δ (式I),式I中,M为不同于Ni、Fe和Mn的金属阳离子;0.67<0.55;0.45<1;且b+c+d+e=1;0≤δ≤0.1,其中,所述金属阳离子是选自Li+、Cu2+、Zn2+、Co2+、Ti4+中的一者;并且其中,所述O3相层状金属氧化物在X射线衍射谱中的I(003)/I(104)大于等于0.7且不高于1.2,其中,I(003)表示O3相层状金属氧化物的(003)晶面峰强度,I(104)表示O3相层状金属氧化物的(104)晶面峰强度,I(003)/I(104)反映了所述O3相层状金属氧化物中钠金属阳离子的混排度。


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    Title :

    Positive electrode active material for sodium-ion battery, sodium-ion battery prepared from active material, battery module, battery pack and device


    Additional title:

    钠离子电池用正极活性材料、由该活性材料制成的钠离子电池、电池模块、电池包及装置


    Contributors:
    HUANG LITING (author) / GUO YONGSHENG (author) / LIANG CHENGDU (author) / LAN JIADIAN (author) / LIN WENGUANG (author)

    Publication date :

    2025-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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




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