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Preparation for shrimp/crab shell biomass charcoal based supercapacitor electrode material

A technology of supercapacitor and biomass carbon, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, carbon preparation/purification, etc. The effect of high specific surface area

Inactive Publication Date: 2018-05-08
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of waste of resources, the present invention uses discarded shrimp and crab shells to prepare biomass carbon materials, which are applied to supercapacitor electrodes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Pretreatment: Clean 1KG of shrimp shells and 1KG of crab shells, dry them in a constant temperature drying oven at 60°C for 10 hours, pulverize them with a micro-nano pulverizer, and pass through a 800-mesh sieve to obtain 1000g of shrimp and crab shell powder;

[0019] 2) Primary carbonization: put the shrimp and crab shell powder pretreated in step 1) into a tube furnace for carbonization, the carbonization temperature is 600°C, the carbonization time is 5h, and the inert gas N 2 The flow rate is 100mL / min, the heating rate is 10°C / min, and 300g of charred shrimp and crab shell powder is obtained;

[0020] 3) Activation: The shrimp and crab shell powder after primary carbonization in step 2) is activated by washing with 20% KOH 900mL at 70°C for 1h, and using 5mol / L HCl 600mL at 60°C for 15h to remove residual impurities. and washed with distilled water, filtered to collect the precipitate, and vacuum-dried to obtain 250 g of activated shrimp and crab shell powder;...

Embodiment 2

[0026] 1) Pretreatment: Clean 1.5KG of shrimp shells and 1.5KG of crab shells, dry them in a constant temperature drying oven at 100°C for 6 hours, pulverize them with a micro-nano pulverizer, and pass through a 500-mesh sieve to obtain 1350g of shrimp and crab shell powder;

[0027] 2) Primary carbonization: put the shrimp and crab shell powder pretreated in step 1) into a tube furnace for carbonization, the carbonization temperature is 1000°C, the carbonization time is 2h, and the inert gas N 2 The flow rate is 100mL / min, the heating rate is 10°C / min, and 400g of charred shrimp and crab shell powder is obtained;

[0028] 3) Activation: The shrimp and crab shell powder after primary carbonization in step 2) is activated by washing with 50% KOH 1200mL at 50°C for 3h, and using 3mol / L HCl 800mL at 60°C for 15h to remove residual impurities. and washed with distilled water, filtered to collect the precipitate, and vacuum-dried to obtain 320 g of activated shrimp and crab shell p...

Embodiment 3

[0034] 1) Pretreatment: Clean 2KG of shrimp shells and 1KG of crab shells, dry them in a constant temperature drying oven at 80°C for 8 hours, pulverize them with a micro-nano pulverizer, and pass through a 700-mesh sieve to obtain 1300g of shrimp and crab shell powder;

[0035] 2) Primary carbonization: put the shrimp and crab shell powder pretreated in step 1) into a tube furnace for carbonization, the carbonization temperature is 800°C, the carbonization time is 4h, and the inert gas N 2 The flow rate is 100mL / min, the heating rate is 10°C / min, and 380g of charred shrimp and crab shell powder are obtained;

[0036] 3) Activation: The shrimp and crab shell powder after primary carbonization in step 2) was activated by washing with 30% KOH 1140mL at 70°C for 1h, and using 3mol / L HCl 760mL at 60°C for 15h to remove residual impurities. and washed with distilled water, filtered to collect the precipitate, and vacuum-dried to obtain 280 g of activated shrimp and crab shell powde...

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Abstract

The invention relates to a method for preparing a supercapacitor electrode material and in particular to a method for preparing a shrimp / crab shell biomass charcoal based supercapacitor electrode material. The method comprises the following steps: pretreating shrimp / crab shells, and performing primary carbonization, activation and secondary carbonization. By adopting the method, shrimp / crab shellsare adopted as a carbon source of the supercapacitor electrode material, and the supercapacitor electrode material is an activated carbon material prepared from biomass. The supercapacitor electrodematerial prepared by using the method is high in specific surface area and high in specific capacitance, and in addition has the advantages of being good in energy conservation and emission reduction,low in carbon and environmental-friendly, relatively low in equipment requirement, and the like.

Description

technical field [0001] The invention relates to a method for preparing an electrode material for a supercapacitor, in particular to a method for preparing an electrode material for a supercapacitor based on shrimp and crab shell biomass charcoal. Background technique [0002] It is estimated that hundreds of thousands of tons of shrimp and crab shells are discarded after eating every year, which not only wastes resources, but also pollutes the living environment. Therefore, how to develop high-value marine biological waste resources such as shrimp and crab shells has attracted widespread attention of scientific researchers. For example, using shrimp shells and crab shells as raw materials can prepare derivatives such as chitin and chitosan, and shell Polysaccharides can be made into sponge-like, ordered and porous nano-adsorption materials, but the extraction of chitosan from shrimp and crab shells is costly and complicated. Contents of the invention [0003] In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01G11/86H01G11/34H01G11/44
CPCH01G11/34H01G11/44H01G11/86Y02E60/13Y02P20/10
Inventor 纪丽丽宋文东郭健蔡璐王亚宁
Owner ZHEJIANG OCEAN UNIV
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