Positive electrode material and battery cell structure

• Main Authors: LUO YONG, YANG WEI, MIAO YONGHUA, XUE CHI
• Format: Patent
• Language: Chinese; English
• Published: 03.06.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a positive electrode material and a battery cell structure. Wherein the positive electrode material comprises 94-96% by mass of lithium iron phosphate, 2-3% by mass of an adhesive and 2-3% by mass of a composite conductive agent; the composite conductive agent comprises a mixture of a carbon nanotube conductive agent and conductive carbon black; the carbon nanotube conductive agent comprises a multi-walled carbon nanotube and graphene; the multi-walled carbon nanotubes comprise a first multi-walled carbon nanotube and a second multi-walled carbon nanotube which are different in tube diameter, and the tube diameter of the first multi-walled carbon nanotube is larger than that of the second multi-walled carbon nanotube. According to the positive electrode material, the mixture of the multi-walled carbon nanotubes with different tube diameters, the graphene and the conductive carbon black is used as the composite conductive agent, so that the conductivity of the positive electrode material