Metal ion doped and titanium sodium aluminum phosphate coated sodium battery positive electrode material as well as preparation method and application of metal ion doped and titanium sodium aluminum phosphate coated sodium battery positive electrode material

• Main Authors: YUE XIANJIN, XU KAIHUA, LI CONG, HUA WENCHAO, ZHANG KUN
• Format: Patent
• Language: Chinese; English
• Published: 16.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; 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 discloses a metal ion doped and titanium aluminum sodium phosphate coated sodium battery positive electrode material as well as a preparation method and application of the metal ion doped and titanium aluminum sodium phosphate coated sodium battery positive electrode material. The method comprises the following steps: 1) adding a nickel-iron-manganese ternary mixed salt solution, an alkali solution, a metal doping source solution and an ammonia water solution into a base solution in a parallel flow manner, and carrying out a co-precipitation reaction to obtain a sodium electric precursor; 2) mixing the sodium battery precursor, a sodium source, an aluminum source, a titanium source, a phosphorus source and alcohol, heating and stirring until liquid is evaporated to dryness, and performing heat treatment on the obtained solid to obtain a metal ion doped sodium aluminum titanium phosphate coated sodium battery positive electrode material; metal doping elements in the metal doping source solution c