Preparation method of graphene/xylogen-based active carbon

Abstract

The invention belongs to the field of chemistry, and provides a preparation method of graphene / xylogen-based active carbon; the method comprises the following steps: 1) preparing xylogen-based active carbon; 2) mixing graphite oxide with active carbon to obtain graphite oxide / xylogen-based active carbon compound; 3) activating the compound by alkali, treating with pyrolysis and reduction, so as to prepare graphene / xylogen-based active carbon composite material; 4) preparing an electrode slice. Comparing to the prior art, the obtained graphene / xylogen-based active carbon provides a larger specific surface, a smaller mass transfer resistance, and a better conductivity. Additionally, applying the synthesized graphene / xylogen-based active carbon to the electrode material of a super capacitor is much better than the existing active carbon material from cost and performance.

Description

technical field

[0001] The invention belongs to the field of chemical industry, in particular to a preparation method of graphene / lignin-based activated carbon. Background technique

[0002] Supercapacitor is a new type of energy storage device developed in the 1970s and 1980s. It is a power source with special properties between traditional capacitors and batteries. It mainly relies on electric double layers and redox pseudocapacitance to store electrical energy. , which is different from traditional chemical power sources. The outstanding advantages of supercapacitors are high power density, short charge and discharge time, long cycle life and wide operating temperature range. They have broad application prospects in national defense, railways, electric vehicle electronics, communications, aerospace and other fields. According to different energy storage mechanisms, supercapacitors can be divided into three categories: electric double layer capacitors based on porous carb...