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Preparation method of pore-adjustable porous activated carbon electrode material

An electrode material and activated carbon technology, which is applied in the field of preparation of porous activated carbon electrode materials, can solve the problem that the energy density of supercapacitors cannot reach that of lithium-ion batteries, and achieve the effect of simple operation and high pore controllability

Active Publication Date: 2021-08-20
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy density of supercapacitors still cannot reach the level of lithium-ion batteries.

Method used

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  • Preparation method of pore-adjustable porous activated carbon electrode material
  • Preparation method of pore-adjustable porous activated carbon electrode material
  • Preparation method of pore-adjustable porous activated carbon electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Dissolve sodium acrylate in water to form a 30% sodium acrylate solution, then add sodium hydroxide to adjust the pH of the solution to neutral, then add starch, polyethylene glycol and K 2 S 2 o 8Carry out graft copolymerization reaction at 25° C. for 6 hours to form starch acrylic acid polymer and dry to obtain starch acrylic acid-based superabsorbent resin. Put the starch acrylic acid-based superabsorbent resin into the cationic dye methylene blue aqueous solution to absorb water and swell. The concentrations of the methylene blue aqueous solution are 0mg / L, 30mg / L, 60mg / L and 100mg / L. The superabsorbent resin is freeze-dried to obtain a superabsorbent resin-based aerogel containing dyes. Mix superabsorbent resin-based airgel and alkali metal compound 1:1 and grind for 10 minutes to obtain a mixture. Put the mixture in a tube furnace to heat up to 800°C at 5°C / min and keep it warm for 60 minutes for carbonization and activation. The obtained product Wash with deio...

Embodiment 2

[0051] Dissolve potassium acrylate in water to form a 40% sodium acrylate solution, then add sodium hydroxide to adjust the pH of the solution to neutral, then add starch, polyethylene glycol and K 2 S 2 o 8 Carry out graft copolymerization reaction at 40° C. for 12 hours to form starch acrylic acid polymer and dry to obtain starch acrylic acid-based superabsorbent resin. Put the starch acrylic acid-based superabsorbent resin into the cationic dye malachite green aqueous solution for water absorption and swelling. The concentration of the malachite green aqueous solution is 0mg / L, 100mg / L, 200mg / L and 300mg / L respectively. The superabsorbent resin after swelling is freeze-dried to obtain a superabsorbent resin-based aerogel containing dye. Mix superabsorbent resin-based airgel with alkali metal compound 1:2 and grind for 10 minutes to obtain a mixture. Put the mixture in a tube furnace to heat up to 1000°C at 8°C / min and keep it warm for 90 minutes for carbonization activati...

Embodiment 3

[0053] Dissolve potassium acrylate in water to form a 50% sodium acrylate solution, then add sodium hydroxide to adjust the pH of the solution to neutral, then add starch, polyethylene glycol and K 2 S 2 o 8 Carry out graft copolymerization reaction at 60° C. for 24 hours to form starch acrylic acid polymer, and dry to obtain starch acrylic acid-based superabsorbent resin. Put the starch acrylic acid-based superabsorbent resin into the cationic dye gentian violet solution for water absorption and swelling. The concentrations of the gentian violet solution are 50mg / L, 100mg / L, 150mg / L and 200mg / L respectively. The superabsorbent resin after swelling is freeze-dried to obtain a superabsorbent resin-based aerogel containing dye. Mix superabsorbent resin-based airgel with alkali metal compound 1:1.5 and grind for 15 minutes to obtain a mixture. Put the mixture in a tube furnace to heat up to 1200°C at 10°C / min and keep it warm for 120 minutes for carbonization and activation. Th...

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Abstract

The invention discloses a preparation method of a pore-adjustable porous activated carbon electrode material. The preparation method specifically comprises: adding sodium hydroxide to an acrylate solution to adjust the solution to be neutral, adding starch, an adhesive and an initiator to carry out a graft copolymerization reaction, drying, placing in a cationic dye solution to carry out water absorption swelling and adsorption equilibrium, drying, mixing and grinding the obtained super absorbent resin-based aerogel and an alkali metal compound, carbonizing and activating, washing, drying, finally mixing and grinding with a conductive agent and an adhesive into slurry, coating a current collector with the slurry, and drying to obtain the porous activated carbon electrode material. The adsorption capacity of the super absorbent resin is controlled through the concentration of the cationic dye, and different amounts of cationic dye can generate different amounts of pi-pi interaction, so that the water absorption swelling degrees of the super absorbent resin are inconsistent, pores with different sizes are generated, and the purpose of controlling the pore structure is achieved.

Description

technical field [0001] The invention belongs to the technical field of electrode material preparation, and in particular relates to a method for preparing a porous active carbon electrode material with adjustable pores. Background technique [0002] With the deterioration of the world's environment and the warming of the climate, the issue of carbon dioxide emissions has attracted the attention of scientists. At present, countries around the world are pursuing the development and utilization of new energy sources. For example, nuclear energy, hydrogen energy, solar energy, etc. However, the generation of these energy sources has certain limitations, such as the intermittency and inhomogeneity of energy generation. The current energy storage components mainly include: capacitors, batteries, and supercapacitors. Among them, supercapacitors have become a research hotspot because of their large power ratio and relatively suitable energy density. The use of supercapacitors fo...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/32H01G11/86
CPCH01G11/26H01G11/32H01G11/86Y02E60/13
Inventor 任鹏刚戴忠侯鑫靳彦岭
Owner XIAN UNIV OF TECH
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