Multi-element precursor of sodium ion battery as well as preparation method and application of multi-element precursor

• Main Authors: XUE XIAOFEI, XU KAIHUA, LI CONG, GONG ZHENGJIE, XIANG XING, ZHANG KUN
• Format: Patent
• Language: Chinese; English
• Published: 13.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a multi-element precursor of a sodium-ion battery as well as a preparation method and application of the multi-element precursor. The chemical formula of the sodium ion battery multi-element precursor is NixMnyMzNa (OH) 2, wherein x is greater than or equal to 0.10 and less than or equal to 0.40, y is greater than or equal to 0.30 and less than or equal to 0.80, z is greater than 0 and less than or equal to 0.20, and a is greater than 0 and less than or equal to 0.02; wherein M is a low-valence metal with a small ion radius, and M is selected from at least one of Co, Cu, K, Mg and Ca; n is a high-valence metal with a large ionic radius, and N is selected from at least one of Ti, Nb, W, Sb and Zr; x, y, z and a meet the requirements that the multi-element precursor of the sodium-ion battery is electrically neutral, and the chemical formula is zero valence. According to the positive electrode material prepared from the multi-element precursor of the sodium ion battery, the charging cut-o