High conductivity electrode material preparation method

Abstract

The invention discloses a high conductivity electrode material preparation method. The method is characterized by comprising the following steps that firstly, nitrogenous porous carbon precursors are prepared; secondly, drying and heat preservation are conducted; thirdly, ball-milling is conducted; fourthly, electrode materials are prepared. According to the high conductivity electrode material preparation method, fructose, glucosamine hydrochloride and zinc chloride are adopted as raw materials for preparing the precursors, the carbonized temperature of porous carbon is low, the energy is saved, the pore structure and the pore distribution of the porous carbon enable the electrode material of a supercapacitor to be good in electric conduction, the equivalent internal resistance of the capacitor is low, high energy density and power density can be achieved, and therefore a device is enabled to have good rate capability, the preparation technology is simple, the cost is low, and the high conductivity electrode material preparation method is applicable to industrial production.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a preparation method of a highly conductive electrode material. Background technique [0002] Climate warming, environmental pollution and energy shortage are major challenges facing mankind at present, and the development of green and renewable energy storage devices is an important issue before mankind. As a new type of green energy storage device, supercapacitors have much higher energy density than traditional capacitors and much higher power density than batteries. application prospects. For example, in terms of high-performance electric vehicles, the supercapacitor is connected in parallel with the battery and the fuel cell. The battery provides energy in normal working conditions, and the supercapacitor supplies energy when pulse energy is needed, so that the service life of the battery can be extended, and the system can also be stored. The exces...

AI Technical Summary

Problems solved by technology

[0004] Conventional supercapacitor production usually adopts wet method, that is, conductive agents such as micropowder porous carbon and carbon black with high specific surface area and organic adhesive are mixed in water or organic solvents, and coated on metal collectors to make electrodes; Although this method is simple and feasible, due to the inhomogeneity of the microscopic pore structure of porous carbon, in which large and medium pores account for the majority, coupled with poor electrical conductivity, the utilization rate of the actual effective pores of the supercapacitor is low, and the specific capacity of the electrode material is relatively low. Low

At present, the BET specific surface area of ​​ultra-high specific surface area porous carbon materials can reach about 3500m2jg, but due to the low utilization rate of the BET specific surface area of ​​carbon materials, the energy ratio of supercapacitors is only 0.8-3.5Wh / kg, and it is difficult to exceed 5Wh / ' kg, so how to improve the utilization of porous carbon pores is an effective way to increase the specific energy of supercapacitors