▎ 摘　　要

NOVELTY - Potassium ion battery, comprises commercial graphite cathode, diaphragm, electrolyte, and battery anode. The anode of the battery includes an anode active material layer and an anode current collector aluminum foil, the anode active material layer includes the anode material of the potassium ion battery, and the anode material of the potassium ion battery includes high-entropy Prussian blue. USE - Potassium ion battery. ADVANTAGE - The method is controllable, simple and easy to prepare, and provides high-entropy Prussian blue potassium ion battery anode with excellent electrochemical performance, cycle stability and multiplying power performance, and long cycle life. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing anode material of high-entropy Prussian blue potassium ion battery comprises (a) mixing potassium ferrocyanide with water to obtain solution A, where the concentration of potassium ferrocyanide solution is 0.01-1 mol/l; (b) mixing transition metal salt with chelating agent and water to obtain solution B, where the transition metal ions (iron, manganese, nickel, cobalt, copper, zinc) are divalent, and transition metal salt comprises vitriol, chloride, and/or oxalate, the concentration of the transition metal salt solution is 0.01-1 mol/l, and the concentration of chelating agent solution is 0.01-1 mol/l, the chelating agent comprises potassium citrate, and dipotassium edetate, and the molar ratio of any five transition metal salts is greater than 1.5 according to the calculated entropy value; (c) slowly adding solution B into solution A through a peristaltic pump under a protective atmosphere for precipitation reaction, where the rate of addition is 0.5-3 ml/minute, and the time for stirring after the dropwise addition is completed in 4-10 hours, and the rotating speed of stirring is 1000 revolutions/minute; and (d) aging the precipitated product, filtering, washing, and drying to obtain the anode material for the high-entropy Prussian blue potassium ion battery, where the drying temperature is 70-120℃, and the drying time is 8-24 hours; and high-entropy Prussian blue potassium-ion battery anode material, prepared as mentioned above