Battery positive electrode material as well as preparation method and application thereof

• Main Authors: YANG MAOMAO, LIU ZURONG, XU CHAQING, XU YUNLING
• Format: Patent
• Language: Chinese; English
• Published: 19.03.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a battery positive electrode material and a preparation method and application thereof, the battery positive electrode material comprises lithium manganese iron phosphate primary particles, the particle size distribution dispersion of the lithium manganese iron phosphate primary particles is 1-4, the particle size distribution dispersion = (Dv90-Dv10)/Dv50, dv10, Dv50 and Dv90 respectively represent the corresponding particle sizes when the particle cumulative volume distribution percentage of the lithium manganese iron phosphate primary particles reaches 10%, 50% and 90%, and the unit is nm. The battery positive electrode material not only has relatively high capacity and good rate capability, but also has good electrochemical performance under a low-temperature condition, and is beneficial to application in a secondary battery. 本申请提供了一种电池正极材料及其制备方法和应用，包括磷酸锰铁锂一次颗粒，所述磷酸锰铁锂一次颗粒的粒度分布离散度为1～4，所述粒度分布离散度＝(Dv90-Dv10)/Dv50，Dv10、Dv50、Dv90分别代表所述磷酸锰铁锂一次颗粒的颗粒累积体积分布百分数达到10％、50％、90％时对应的粒径，单位均为nm。该电池正