Positive electrode active material of lithium ion battery, preparation method for positive electrode active material, lithium ion battery positive electrode, and lithium ion battery

• Main Authors: JI YONG, XIAN XUEFENG, XIA DONGYAN
• Format: Patent
• Language: Chinese; English
• Published: 20.07.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the technical field of a battery material, and discloses a positive electrode active material of a lithium ion battery, a preparation method for the positive electrode active material, a lithium ion battery positive electrode, and the lithium ion battery. The preparation method for the positive electrode active material of the lithium ion batter comprises the steps of (1) mixing a phosphorus source, an iron source, a lithium source, a carbon source and a solvent to obtain slurry; (2) drying the slurry to obtain a precursor, and then smashing the precursor to obtain precursor powder; and (3) roasting the precursor powder under protective atmosphere, wherein the carbon source comprises carbohydrate and thermosetting resin. The lithium iron phosphate material prepared by the method has an obvious and relatively high conductive performance; and the lithium ion battery prepared from the material has obvious and relatively low internal resistance and an obvious and relatively high cycling p