Method for modification of lithium ion battery anode material

• Main Authors: YUE MIN, REN JIANGUO, YANG SHUNYI, HUANG YOUYUAN, CHENG LIN
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2013
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a method for modification of a lithium ion battery anode material. The method comprises the following steps of 1, mixing an organic acid and an alcohol into an organic solution, 2, adding an anode material into the organic solution and carrying out mixing to obtain a suspension liquid, 3, carrying out centrifugal separation and carrying out washing by an alcohol solvent, and 4, carrying out drying. The anode material is a Ni-based metal-oxide anode material LiNixM1-xO2, wherein x is greater than or equal to 0.5 and is less than 1 and M represents one or two of Co, Mn, Al, Cr, Mg, Cu, Ti, Mg, Zn, Zr and V. Compared with the prior art, the method utilizes the mixed solution of the alcohol and the organic acid to wash the anode material so that soluble Li salt impurities on the surface of the anode material are removed and a material pH value is obviously reduced. Through low-temperature drying, the washed anode material is coated with alcohol molecules for blocking air so that the bindin