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Supercapacitor material based on biochar-coated [Zn4O(BDBC)3]8 and preparation method thereof

A technology of supercapacitor and biochar, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of low energy density of metal-organic framework materials, poor cycle stability of supercapacitor materials, low power density of redox potential, etc., to promote diffusion and migration. , the effect of excellent electrical conductivity and huge specific surface area

Inactive Publication Date: 2020-02-28
李建龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a biochar-coated [Zn 4 O(BDBC) 3 ] 8 The supercapacitor material and its preparation method, and solve the problem that the energy density of the metal organic framework material is not high, the chemical performance is unstable, and the cycle stability of the supercapacitor material is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Hydrothermal preparation of metal-organic frameworks [Zn 4 O(BDBC) 3 ] 8 : Add 600 mL to a 2000 mL three-necked bottle N -Methylpyrrolidone, pass into N 2 Exhaust the air in the three-necked bottle and N -Dissolved oxygen in methylpyrrolidone, then add 5 parts of biphenyl-4,4'-dicarboxylic acid and 65 parts of zinc iodide in sequence, place the three-necked bottle in a constant temperature water bath and heat it to 85 °C, and stir at a constant speed for 6 hours , and then transfer the material in the three-necked bottle into the hydrothermal synthesis automatic reaction kettle, set the temperature at 140 °C, and magnetically stir the reaction for 12 hours. After the reaction is completed, the reaction kettle is cooled to room temperature, and the reaction material is filtered through a non-conductive funnel. The solvent was removed to obtain a solid mixture, and the solid mixture was washed with 5000 mL of distilled water and 500 mL of absolute ethanol to remov...

Embodiment 2

[0028] (1) Hydrothermal preparation of metal-organic frameworks [Zn 4 O(BDBC) 3 ] 8 : Add 600 mL to a 2000 mL three-necked bottle N -Methylpyrrolidone, pass into N 2 Exhaust the air in the three-necked bottle and N - Dissolved oxygen in methylpyrrolidone, then add 6 parts of biphenyl-4,4'-dicarboxylic acid and 63 parts of zinc iodide in sequence, place the three-necked bottle in a constant temperature water bath and heat it to 85 °C, and stir at a constant speed for 6 hours , and then transfer the material in the three-necked bottle into the hydrothermal synthesis automatic reaction kettle, set the temperature at 140 °C, and magnetically stir the reaction for 12 hours. After the reaction is completed, the reaction kettle is cooled to room temperature, and the reaction material is filtered through a non-conductive funnel. The solvent was removed to obtain a solid mixture, and the solid mixture was washed with 5000 mL of distilled water and 500 mL of absolute ethanol to remo...

Embodiment 3

[0031] (1) Hydrothermal preparation of metal-organic frameworks [Zn 4 O(BDBC) 3 ] 8 : Add 70 mL to a 2000 mL three-necked bottle N -Methylpyrrolidone, pass into N 2 Exhaust the air in the three-necked bottle and N - Dissolved oxygen in methylpyrrolidone, then add 7 parts of biphenyl-4,4'-dicarboxylic acid and 61 parts of zinc iodide in sequence, place the three-necked bottle in a constant temperature water bath and heat it to 85 °C, and stir at a constant speed for 7 hours , and then transfer the material in the three-necked bottle into the hydrothermal synthesis automatic reaction kettle, set the temperature at 145 °C, and magnetically stir the reaction for 14 hours. After the reaction is completed, the reaction kettle is cooled to room temperature, and the reaction material is filtered through a non-conductive funnel. The solvent was removed to obtain a solid mixture, and the solid mixture was washed with 6000 mL of distilled water and 600 mL of absolute ethanol to remov...

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Abstract

The invention relates to the technical field of supercapacitor materials, and discloses a supercapacitor material based on biochar-coated [Zn4O(BDBC)3]8 and a preparation method thereof. The supercapacitor material comprises the following formula materials: biological straw, biphenyl-4, 4'-dicarboxylic acid, and zinc iodide. According to the supercapacitor material based on biochar-coated [Zn4O(BDBC)3]8 and the preparation method thereof, a metal organic framework [Zn4O(BDBC)3]8 itself has very low internal resistance and good electrical conductivity so as to reduce the resistance of migratingmetal ions and charges through an electrode material, and increase the specific capacitance and energy density of the capacitor. The biochar has a large specific area and porosity. The surface of thebiochar has a large number of highly aromatized oxygen-containing groups which form hydrogen bonds with the active oxhydryl on the surface of the [Zn4O(BDBC)3]8 such that the [Zn4O(BDBC)3]8 is evenlydispersed and attached tightly to the pores of the biochar, thereby increasing the contact area between [Zn4O(BDBC)3]8 and an electrolyte, diffusing and mirgrating a large number of metal ions and charges between the electrode material and the electrolyte, and increasing the power density and the energy density of the supercapacitor.

Description

technical field [0001] The invention relates to the technical field of sodium ion cathode materials, in particular to a biochar-coated [Zn 4 O(BDBC) 3 ] 8 Supercapacitor materials and their preparation methods. Background technique [0002] With the depletion of fossil fuels and the increasingly serious environmental problems caused by combustion, people are studying new energy devices to replace internal combustion engines, such as the research and development of hybrid power, chemical batteries, fuel cells and other products, but these new battery materials have a long service life. The obvious disadvantages such as short, poor temperature-sensitive characteristics, high cost, and environmental pollution of chemical batteries have hindered the practical application of new battery materials. [0003] Supercapacitor refers to a new type of energy storage device between traditional capacitors and rechargeable batteries. It has the characteristics of fast charging and disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/32H01G11/44H01G11/24
CPCH01G11/24H01G11/30H01G11/32H01G11/44Y02E60/13
Inventor 李建龙
Owner 李建龙
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