PRUSSIAN BLUE CATHODE MATERIAL HAVING HIGH SODIUM CONTENT, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF, AND SODIUM ION BATTERY

• Main Authors: LI, Yongcheng, LI, Dongxiang, WANG, Wanlin, CHOU, Shulei, GONG, Yitao, LI, Yashu
• Format: Patent
• Language: Chinese; English; French
• Published: 12.03.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to the technical field of new energy storage materials, and relates to a Prussian blue cathode material having high sodium content, a preparation method therefor and application thereof, and a sodium ion battery. The molecular formula of the Prussian blue cathode material having high sodium content is NaxM aNbFe(CN)6, wherein M and N are transition metals that are identical or different, and are each independently selected from Fe, Co, Mn, Ni, Cu, Zn, Cr, V, Zr, or Ti, x is greater than 1.8 and less than 2, a is greater than 0 and less than 1, b is greater than 0 and less than 1, and a plus b is equal to 1. The cathode material has a micrometer-grade cubic morphology and excellent electrochemical performance; by means of the preparation method, the material is slowly crystallized and has high sodium content; the preparation method is simple and easy to perform, production efficiency and yield are high, the raw materials are cheap, and industrial enlarged production is easily real