Preparation method of surface-coating anode material of lithium ion battery
A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor high-temperature storage performance, low capacity, and poor cycle performance, and achieve good cycle stability and high quality ratio Excellent capacity and cycle stability
Inactive Publication Date: 2014-03-26
高建军
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The invention discloses a preparation method of a surface-coating anode material of a lithium ion battery. The preparation method comprises the steps of (1) mixing lithium iron phosphate, lithium nickel cobalt oxide, magnesium nitrate and cobalt oxide to form an anode material mixture, heating the anode material mixture to above the melting point of the magnesium nitrate, and cooling the mixture after reaction lasts for 2h to 6h; (2) grinding the cooled anode material mixture, sieving the ground anode material mixture by utilizing a 200-mesh screen, placing the sieved mixture into a mixing drying kettle, and spraying a lithium hydroxide saturated solution into the mixing drying kettle; (3) staring a mixer, spraying aluminum sulfate into the mixing drying kettle to obtain hydrolysis reaction mixture; (4) drying, thermally treating and cooling the hydrolysis reaction mixture, pulverizing the mixture, and sieving the mixture by utilizing the 200-mesh screen to obtain the surface-coating lithium ion battery anode material. The anode material prepared by adopting the preparation method is uniformly coated, so that the circulation stability is good, the quality is high, the specific capacity is high, when the anode material is applied to a lithium ion battery, t he capacity is high, the circulating stability is good, and the service life is long.
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