Reed flower biochar-based electrode material and preparation method thereof

Abstract

The invention relates to a reed flower biochar-based electrode material and a preparation method thereof. The preparation method comprises the steps of carbonizing reed flowers in a nitrogen atmosphere, and performing high-temperature activation and nitrogen doping by taking potassium hydroxide as an activating agent and a nitrogen-containing compound as a nitrogen doping agent to obtain reed flower biochar; and mixing the reed flower biochar with acetylene black and polytetrafluoroethylene emulsion, tabletting and drying to obtain the reed flower biochar-based electrode material. The reed flowers are selected to prepare the electrode material, carbonization, activated pore-forming and nitrogen doping are completed in one step, and the preparation process is simple and easy to operate; the selected nitrogen-containing compound such as diethanol amine has hydroxyl and can chemically react with carboxyl on the surface of reed flowers, so that the nitrogen-containing compound can be better combined with biomass carbon, and the nitrogen doping amount is high; and meanwhile, diethanol amine has alkalinity and water solubility, can easily enter the plant fibers, is easier for pore forming in the high-temperature carbonization process, and serves as a nitrogen doping agent and an auxiliary pore forming agent in the biochar-based material preparation process.

Description

technical field [0001] The invention relates to the technical field of electrode material preparation, in particular to a reed flower biochar-based electrode material and a preparation method thereof. Background technique [0002] Today, with environmental problems and fuel energy shortages becoming more and more prominent, it has become an irreversible trend to vigorously develop clean and renewable energy. The development of new high-efficiency energy storage devices is an important part of the study of sustainable energy utilization. Supercapacitors, lithium-ion batteries, lithium-sulfur batteries, and other rechargeable batteries are considered promising energy storage devices. Supercapacitors have the advantages of environmental protection, high specific capacitance, fast charging and discharging, large storage capacity, and long cycle life. They are widely used in industrial fields such as military and automobiles. The electrode material in a supercapacitor is the mo...

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Problems solved by technology

At present, there have been studies on the preparation of porous carbon materials using natural products, but the electrochemical activity is low, which is not suitable for supercapacitor electrode materials

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