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Method for preparing straw-based activated carbon supercapacitor electrode material for enhancing energy storage efficiency through manganese ore
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A technology of supercapacitor and electrode material, applied in the field of electrochemistry, can solve the problems of unsatisfactory performance optimization effect of straw-based activated carbon, and achieve the effect of simple and feasible operation method, stable structure and high specific capacitance
Inactive Publication Date: 2019-09-10
安徽华威新能源有限公司 +1
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Problems solved by technology
In recent years, many scholars at home and abroad have conducted a lot of research on the preparation of activated carbon from corn straw, rice straw, wheat straw, etc., but the performance optimization effect of straw-based activated carbon is not ideal.
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Embodiment 1
[0029] The present embodiment prepares gac according to the following steps:
[0030] (1) drying the collected stalks at 80°C for 5 hours, crushing them through a 40-mesh sieve, and obtaining straw granules for later use;
[0031] (2) Mix 5g of straw particles with 1.5g of manganese dioxide ore powder evenly to obtain a mixed material;
[0032] (3) Put the mixed material in a high-temperature tube furnace, under the protection of inert gas nitrogen, raise the temperature to 400°C at a rate of 5°C / min, carbonize at a constant temperature for 1h, then stop heating, and continue to cool to room temperature under the protection of nitrogen , taken out and ground into powder to obtain carbidepowder;
[0033] (4) Mix 2g of carbonized material powder with 6g of solid powder KOH, then add 200mL of deionized water, ultrasonically disperse evenly, and then heat in a water bath at 80°C for 10h;
[0034] The obtained product was dried in a drying oven at 90°C for 3 hours, then placed i...
Embodiment 2
[0043] The present embodiment prepares gac according to the following steps:
[0044] (1) drying the collected stalks at 80°C for 5 hours, crushing them through a 40-mesh sieve, and obtaining straw granules for later use;
[0045] (2) Mix 5g of straw particles with 2g of manganese dioxide ore powder evenly to obtain a mixed material;
[0046] (3) Put the mixed material in a high-temperature tube furnace, under the protection of inert gas nitrogen, raise the temperature to 500°C at a rate of 5°C / min, carbonize at a constant temperature for 1h, then stop heating, and continue to cool to room temperature under the protection of nitrogen , taken out and ground into powder to obtain carbide powder;
[0047] (4) Mix 2g of carbonized material powder with 8g of solid powder KOH, then add 200mL of deionized water, ultrasonically disperse evenly, and then heat in a water bath at 80°C for 10h;
[0048] The obtained product was dried in a drying oven at 90°C for 3 hours, then placed in ...
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Abstract
The invention discloses a method for preparing a straw-based activated carbonsupercapacitorelectrode material for enhancing energy storage efficiency through a manganese ore. The method comprises the following steps: mixing straw with a manganese ore, carrying out high-temperature carbonization and activation, and further carrying out acid soaking, water washing and drying on the obtained activated product, so as to obtain activated carbon used as the supercapacitorelectrode material. By adopting the method, the manganese ore and the straw which are low in price and easy to obtain are mixedand calcined to optimize electrochemical properties of a straw-based capacitor, and not only are process conditions simple, but also the electrochemical properties of the straw-based capacitor are greatly improved; and the obtained activated carbon prepared by using the method is stable in structure and developed in pore, has high specific capacitance and circulation stability, and is an ideal supercapacitorelectrode material.
Description
technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing a straw-based activated carbon supercapacitor electrode material. Background technique [0002] Due to the destruction of the ecological balance, the energy crisis and environmental pollution have become major bottlenecks affecting the sustainable development of the world today. At present, in addition to coal, oil and natural gas, available energy in the world also includes water power, wind power and agricultural waste. Among them, wheat straw is a kind of renewable agricultural waste widely distributed in the world. Comprehensive treatment of it to realize the industrial application of agricultural waste in various fields can alleviate the energy crisis and environmental pollution, and at the same time improve the comprehensive benefits of agriculture. At present, it is a hot issue that researchers from all over the world are studying. [0003] Developi...
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