A method for combined modification of carbon monofluoride by hybrid plasma and in situ compounding

Abstract

The present application belongs to the technical field of new materials and lithium primary battery, and provides a method for modifying carbon fluoride by combined plasma and in-situ compounding, and a lithium primary battery prepared by using the modified carbon fluoride as a positive electrode material. The present application uses mixed plasma to control the C-F bond type of carbon fluoride, and the fluorocarbon bond is selectively broken to form an amorphous carbon layer on the surface of the carbon fluoride in-situ. Potassium permanganate is used as a manganese source to react with the surface carbon and organic source to generate ultra-fine manganese dioxide particles in-situ, and form a CF x / MnO2 composite material, which is used as a positive electrode material of a lithium / carbon fluoride primary battery. The residual carbon layer on the surface of the carbon fluoride and the composite manganese dioxide particles can effectively improve the conductivity of the carbon fluoride, slow down the electrochemical polarization in the discharge process of the primary battery, reduce the voltage hysteresis effect in the initial stage of discharge, and further improve the rate performance of the lithium / carbon fluoride battery, which is of great significance to promote the application and popularization of the lithium / carbon fluoride battery.