▎ 摘　　要

NOVELTY - A high nickel layered oxide material (I), is new. USE - The material is useful in electrode material for positive pole piece of sodium ion battery (all claimed). DETAILED DESCRIPTION - A high nickel layered oxide material of formula (I): NaxNiaFebMncMd0(2 plus minus delta ), is new, where the nickel, iron, and manganese are transition metal elements, the ions of the transition metal site and the adjacent six oxygens form an octahedral structure in the structure of the oxide material, and arranged alternately with sodium oxide compound of formula: NaO6 layers coordinated with octahedrons to form a high nickel layered oxide material of O3 type sodium ion battery with space group R-3m. M = element doped and substituted for transition metal sites, preferably Li+, Mg2+, Ca2+, Cu2+, Zn2+, Al3+, B3+, Co3+, V3+, Y3+, Ti4+, Zr4+, Sn4+, Mo4+, Si4+, Ru4+, Nb5+, Sb5+, Mo5+, Mo6+, and/or W6+; x = 0.67-1; a = 0.5-1; b = 0.01-0.35; c = 0.01-0.35; d = 0-0.3;and delta = 0-0.1. INDEPENDENT CLAIMS are included for the following: (1) a method for preparing the high nickel layered oxide material for sodium ion battery, involving performing solid phase method by adding a sodium source of 100 wt.% to 120 wt.% of the required sodium stoichiometric amount, mixing required stoichiometric amounts of nickel oxide, iron oxide, manganese oxide and M oxide, hydroxide or nitrate in proportion, and adding absolute ethanol or acetone to uniformly grind to obtain precursor powder, placing the obtained precursor powder pellets in a crucible, and calcining in a sintering atmosphere of air and/or oxygen at 700-900 degrees C for 10-24 hours, cooling to room temperature and grinding to obtain the product, where the sodium source comprises sodium nitrate, sodium peroxide, sodium superoxide, sodium carbonate, sodium hydroxide and/or sodium oxalate, (or) performing co-precipitation-high temperature solid phase method by preparing a mixed solution of water-soluble nickel salt, iron salt, manganese salt and M salt based on the required ratio of nickel, iron, manganese and M as the first solution, mixing the required stoichiometric amount of sodium source of 100-120 wt.% sodium, required stoichiometric amount of nickel oxide, iron oxide, manganese oxide, and M oxide, hydroxide or nitrate in proportion, adding absolute ethanol or acetone, uniformly grinding to obtain precursor powder, placing the obtained precursor powder tablet in a crucible, calcining in a sintering atmosphere of air and/or oxygen at 700-900 degrees C for 10-24 hours, cooling to room temperature and grinding to obtain the product, where the concentration of cations in the first solution is 1-3 mol/l, and the sodium source comprises sodium nitrate, sodium peroxide, sodium superoxide, sodium carbonate, sodium hydroxide and/or sodium oxalate, (or) performing sol-gel method by weighing stoichiometric 100-120 wt.% sodium ions, soluble salts of transition metal ions, and appropriate amount of citric acid to dissolve in deionized water to form a slurry of a mixed solution based on the required stoichiometric ratio, where the transition metal ions comprise nickel, iron, and manganese, the transition metal ion further comprises the element M that is doped and substituted for the transition metal site, heating and evaporating the obtained slurry to dryness in an oil bath to form a dry gel, putting the obtained dry gel in a crucible, pretreating at 400-500 degrees C for 3-6 hours, grinding the powder obtained from the pretreatment, placing the tablet in the crucible at 700-900 degrees C, calcining in air and/or oxygen atmosphere for 10-24 hours, cooling to room temperature and grinding to obtain the product; and (2) an electrode material for sodium ion secondary battery, comprising conductive additive, binder, and high nickel layered oxide material. M = element doped and substituted for transition metal sites, preferably Li+, Mg2+, Ca2+, Cu2+, Zn2+, Al3+, B3+, Co3+, V3+, Y3+, Ti4+, Zr4+, Sn4+, Mo4+, Si4+, Ru4+, Nb5+, Sb5+, Mo5+, Mo6+, and/or W6+.