Abstract
In this study, activated carbon was prepared by the potassium hydroxide activation method with flax residues as raw materials. High-quality activated carbon was prepared by single factor and orthogonal experiments. Iodine adsorption and methylene blue adsorption were used as performance indicators. As prepared activated carbon was characterized by XRD, XPS and SEM. The results showed that the optimized electrode material was prepared under an impregnation ratio of 1:2, activation temperature of 800°C and activation time of 100 min. The yield of activated carbon was 49.48%, the iodine value was 1667.13 mg/g and the methylene blue value was 429 mg/g. The specific surface area measured by the automatic porosity analyzer is 1221 m2/g, and the mass-specific capacitance is 215.7 F/g under current density of 0.1 A/g.
Highlights
In recent years, with the rapid growth of the world population and rapid economic development, people’s living standards have been constantly improved, and science and technology have been continuously improved [1]
The results showed that the optimized electrode material was prepared under an impregnation ratio of 1:2, activation temperature of 800 ̊C and activation time of 100 min
According to different impregnation ratios, KOH was dissolved in a quantitative amount of water and mixed with the weighed flax residue carbon, and the flax residue carbon/KOH mixture was obtained by impregnation for 6 h after thorough ultrasonic mixing
Summary
With the rapid growth of the world population and rapid economic development, people’s living standards have been constantly improved, and science and technology have been continuously improved [1]. People have begun to invest more in the development of energy-saving and green new energy technologies, so the development of new energy and new energy storage device have become one of the hot issues studied by global researchers. Conventional capacitors had very low capacity and cannot meet the power density requirements [2], the supercapacitor was born.
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