▎ 摘　　要

NOVELTY - Preparing Prussian blue analogue anode material, comprises (1) dissolving bivalent metal salt and complexing agent in deionized water at different molar ratio to obtain reaction solution with concentration is 0.05-1 mol/l, adding acetic acid-sodium acetate buffer solution to adjust pH of the solution to 3-7 to obtain reaction solution A, the metal salt includes bivalent manganese salt or ferrous salt, (2) dissolving sodium ferrocyanide or their hydrate in deionized water to obtain sodium ferrocyanide solution having concentration of 0.05-1 mol/l as reaction solution B, and (3) adding solution B into solution A, stirring, allowing to stand, filtering, washing and drying to obtain final product. USE - The Prussian blue analogue anode material is useful in sodium-ion battery (claimed). ADVANTAGE - The method: produces Prussian blue analogue with low crystal water and low defects; ensures the Prussian blue analogue anode material exhibit excellent charge-discharge specific capacity, rate performance and cycle stability in both anode material of the sodium ion battery and the corresponding sodium ion battery; has low cost, short reaction period; and is easy to carry out and suitable for large-scale industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of Prussian blue analog anode material as anode in sodium-ion battery, where the sodium-ion battery comprises anode, cathode and electrolytic solution, the electrolytic solution comprises sodium salt, organic solvent and additive, the sodium salt includes sodium trifluoromethanesulfonimide, sodium bis(fluoromethane)sulfonimide, sodium trifluoromethanesulfonate, sodium hexafluorophosphate, sodium perchlorate, sodium nitrate and/or sodium tetrafluoroborate; the organic solvent includes dimethoxyethane, diglyme, triglyme, tetraglyme, polyethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol diethyl ether, 1,3 dioxolane, dioxane, tetrahydrofuran, 2-methyltetrahydrofuran, fluoroethylene carbonate, propylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, ethylene carbonate and/or vinylene carbonate; and the additive includes 0.01-10% fluoroethylene carbonate and 0.01-10% vinylene carbonate.