The present invention relates to a positive electrode active material for a lithium ion rechargeable battery, the positive electrode active material comprising particles having Li, M 'and oxygen, where M' comprises: Ni in an amount x, where x > = 80 at% with respect to M '; co in an amount y, with respect to M ', 0.01 at% < = y < = 20.0 at%; mn in an amount z, where 0 at% < = z < = 20.0 at% with respect to M '; y in an amount b, where 0.01 at% < = b < = 2.0 at% with respect to M '; zr in an amount of c, where 0.01 at% < = c < = 2.0 at% with respect to M '; d in an amount a, where 0 at% < = a < = 5.0 at% with respect to M ', where D is at least one element selected from the list of B, Ba, Ca, Cr, Fe, Mg, Mo, Nb, S, Si, Sr, Ti, V, W, and Zn; wherein x, y, z, a, b and c are measured by ICR, where x + y + z + a + b + c is 100.0 at%, where the positive electrode active material comprises an integral particle, where the particle has a Co content measured by cross-sectional EDS (CS-EDS) at the edge of the particle, Co edge, where Co edge represents at% relative to the sum of the Ni, Mn and Co content measured by CS-EDS at the edge of the particle, where x + y + z + a + b + c represents at% relative to the sum of the Ni, Mn and Co content measured by CS-EDS, and where x + y + z + a + b + c represents at% relative to the sum of the Ni, Mn and Co content measured by CS-EDS at the edge of the particle. Wherein the particle has a Co content, Co center, measured by CS-EDS at the center of the particle, where Co center represents at% relative to the sum of the Ni, Mn and Co content measured by CS-EDS at the center of the particle, and where the ratio Co edge/Co center gt; and 1.10.
本发明涉及一种用于锂离子可再充电电池的正电极活性材料,该正电极活性材料包含具有Li、M’和氧的粒子,其中M’包含:−含量为x的Ni,其中相对于M’,x≥80 at%;−含量为y的Co,其中相对于M’,0.01 at%≤y≤20.0 at%;−含量为z的Mn,其中相对于M’,0 at%≤z≤20.0 at%;−含量为b的Y,其中相对于M’,0.01 at%≤b≤2.0 at%;−含量为c的Zr,其中相对于M’,0.01 at%≤c≤2.0 at%;−含量为a的D,其中相对于M’,0 at%≤a≤5.0 at%,其中D为选自以下的列表的至少一种元素:B、Ba、Ca、Cr、Fe、Mg、Mo、Nb、S、Si、Sr、Ti、V、W和Zn;其中x、y、z、a、b和c是通过ICR测量的,其中x+y+z+a+b+c为100.0 at%,其中该正电极活性材料包含整体粒子,其中该粒子具有在该粒子的边缘处通过横截面EDS(CS‑EDS)测量的Co含量Co边缘,其中Co边缘表示为相对于在该粒子的边缘处通过CS‑EDS测量的Ni、Mn和Co含量的总和的at%,其中该粒子具有在该粒子的中心处通过CS‑EDS测量的Co含量Co中心,其中Co中心表示为相对于在该粒子的中心处通过CS‑EDS测量的Ni、Mn和Co含量的总和的at%,并且其中比率Co边缘/Co中心>1.10。
POSITIVE ELECTRODE ACTIVE MATERIAL AND METHOD FOR MANUFACTURING POSITIVE ELECTRODE ACTIVE MATERIAL
正电极活性材料以及用于制造正电极活性材料的方法
2025-05-09
Patent
Electronic Resource
Chinese
IPC: | C01G Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle , COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F / 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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