Modified high-nickel ternary positive electrode material and manufacturing method thereof capable of effectively improving safety and prolonging service life of batteries

• Main Authors: WENG, BIING-JYH, HU, CHIN-WEI, CHEN, PO-WEN, CHOU, PENG-YI
• Format: Patent
• Language: Chinese; English
• Published: 01.02.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING

The present invention provides a modified high-nickel ternary positive electrode material manufacturing method, including: (A) adding a conductive high molecular polymer to an organic solvent, mixing the two to make the conductive high molecular polymer uniformly dispersed in the organic solvent to form a polymer solution, wherein the solid content of the polymer solution is between 50% and 70%; (B) adding a high nickel ternary positive electrode material powder into the polymer solution of step (A), mixing and heating to 80 DEG C until the organic solvent is completely evaporated to form a mixture, wherein the conductive high molecular polymer in the mixture covers the high-nickel ternary positive electrode material, and the weight percentage of the conductive high molecular polymer to the high-nickel ternary material is from 0.1:99.9 to 10:90; and (C) subjecting expanded graphite and the mixture of step (B) to a coating and mixing process at a weight percentage of 0.5:99.5 to 5:95 to form a modified high-ni