METAL-ION-DOPED AND SODIUM-LITHIUM-ALUMINUM-TITANIUM-PHOSPHATE-COATED SODIUM-ION BATTERY POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF

• Main Authors: XU, Kaihua, HUA, Wenchao, ZHANG, Kun, YUE, Xianjin, LI, Cong
• Format: Patent
• Language: Chinese; English; French
• Published: 06.09.2024
• 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

A metal-ion-doped and sodium-lithium-aluminum-titanium-phosphate-coated sodium-ion battery positive electrode material, a preparation method therefor, and a use thereof. The method comprises: 1) concurrently adding a nickel-iron-manganese ternary mixed salt solution, an alkali solution, a metal doping source solution, and an ammonia solution into a base solution for a coprecipitation reaction to obtain a sodium-ion battery precursor; and 2) mixing the sodium-ion battery precursor, a sodium source, an aluminum source, a titanium source, a phosphorus source, and alcohol, performing heating and stirring until the liquid is evaporated, and performing heat treatment on the obtained solid to obtain a metal-ion-doped and sodium-titanium-aluminum-phosphate-coated sodium-ion battery positive electrode material, wherein a metal doping element in the metal doping source solution comprises at least one of ruthenium, iridium, platinum, and calcium. The method can effectively relieve the structural degradation and intergra