Oxide material rich in Mg and cation vacancies as well as preparation method and application of oxide material

• Main Authors: CHEN YONG'AN, MAI LIQIANG, ZHOU LIANG, LI XINYUAN, CAI CONGCONG
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• 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 provides an oxide material rich in Mg and cation vacancies and a preparation method and application thereof.The preparation method comprises the following steps: adding oxalic acid into deionized water, stirring to dissolve to obtain solution A, taking sodium nitrate, magnesium nitrate hexahydrate and manganese acetate tetrahydrate according to the molar ratio of the elements in thechemical general formula NaxMgy1-y-zMnzO2, adding the materials into the solution A, and stirring and dissolving to obtain a solution B; drying the solution B to obtain a precipitate, and pre-sintering the precipitate to obtain a pre-sintered sample; and grinding the pre-sintered sample, calcining, and cooling to obtain the oxide material rich in Mg and cation vacancies. The sodium-ion battery oxide positive electrode material rich in Mg and cation vacancies is constructed, the electrochemical stability of the sodium-ion battery is improved, and the defects that the voltage of the sodium-ion battery electrode material