Quaternary composite carbon conductive agent and preparation method thereof

Abstract

The invention discloses a quaternary composite carbon conductive agent, which mainly comprises carbon black, carbon nano-fibers, graphite and quasi-two-dimensional nano carbon. The preparation method of the quaternary composite carbon conductive agent mainly includes the steps: mixing the carbon black and the graphite to form carbon-containing mixture and performing microwave discharge under the protection of nitrogen to generate a conductive agent head product with parts of the carbon nano-fibers; adding dispersing agents, adhesives and solvents into the conductive agent head product to perform wet stirring and ball milling; and obtaining the quaternary composite carbon conductive agent. The quaternary composite carbon conductive agent has the advantages of high conductivity, large specific surface area, high purity, high dispersibility, low addition ratio and the like, the conductivity is higher than 10S / cm, the specific surface area can reach 40 (m2 / g), the ash content is lower than 0.02%, and the addition ratio can be generally smaller than 2%. The quaternary composite carbon conductive agent has excellent conductivity, can be sufficiently dispersed in an electrode and can be used for a high-performance battery.

Description

technical field [0001] The invention relates to a battery electrode material and a preparation method thereof, in particular to the technical field of an electrode conductive material and a preparation method thereof. Background technique [0002] Energy crisis, exhaustion of petrochemical resources, it is imminent to find alternative energy sources and increase the development and utilization of renewable energy. High-performance energy storage batteries are one of the key components of renewable energy generation systems such as solar photovoltaic power generation systems and wind power generation systems. It is not only related to the power quality of solar and wind power generation, but also has a decisive impact on the cost of the generated electricity, which in turn affects whether solar and wind power generation technology can really enter thousands of households; the intensification of environmental protection pressure and the promotion of low-carbon economy , has pu...

AI Technical Summary

Problems solved by technology

[0003] Due to the low conductivity of the electrode materials of most high-performance batteries, the internal resistance of the entire electrode increases, the utilization rate of active materials is low, and the overall performance decreases. A certain amount of conductive agent can increase its conductivity, but the current common conductive agents have disadvantages such as low specific surface area, poor dispersion, high addition ratio, and insufficient conductivity.