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Preparation method of multistage-channel carbon electrode material

A porous carbon electrode and carbon material technology, which is applied in the field of electrode materials, can solve the problems of rapid specific capacity decay and limit the free diffusion of electrolyte ions, etc., to facilitate rapid migration, solve the problem of high current charging and discharging, and enrich the pore size distribution Effect

Inactive Publication Date: 2013-07-03
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although general porous carbon materials have high specific surface area and high theoretical specific capacity, due to the small pore size, the free diffusion of electrolyte ions in the pores is limited, and the specific capacity decays rapidly as the working power increases.

Method used

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  • Preparation method of multistage-channel carbon electrode material
  • Preparation method of multistage-channel carbon electrode material
  • Preparation method of multistage-channel carbon electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Clean Artemia egg shells, ball mill them for 2 hours, and then use HCl with a concentration of 6mol / L and HCl with a concentration of 8mol / L, respectively. 2 SO 4 , 6mol / L HNO 3 , 2mol / L KOH soaking pretreatment, soaking time is 6h for each substance, and drying to remove water. Calcinate the treated eggshell in an inert atmosphere, raise the temperature to 250°C at a rate of 1°C / min, keep it for 2 hours, then raise the rate of temperature rise to 500°C at a rate of 1°C / min and keep it for 1 hour. HNO 3 Ultrasonic treatment for 1 hour, the ultrasonic frequency is 40KHz, and the power is 30W. Then soak in 6mol / L HCl for 12h, wash to neutral, and dry to obtain a multi-level porous carbon material. The resulting material was characterized under SEM as figure 1 As shown, the hierarchical pore structure of carbon materials can be observed.

[0020] Grind the carbon material into powder, take 80 mg of carbon material, 15 mg of acetylene black, and 5 mg of PTFE emulsion ...

Embodiment 2

[0024] Clean Artemia egg shells, ball mill them for 7 hours, and then use HCl with a concentration of 9mol / L and HCl with a concentration of 13mol / L, respectively. 2 SO 4 , 10mol / L of HNO 3 , 4mol / L KOH soaking pretreatment, soaking time is 27h for each substance, and dry to remove water. Calcinate the above-mentioned treated Artemia eggshells in an inert atmosphere, raise the temperature to 300°C at a rate of 3°C / min, keep it for 7h, then raise the temperature to 750°C at a rate of 5.5°C / min and heat it for 24.5h, then HNO at 10mol / L 3 Ultrasonic treatment for 5.5 hours, the ultrasonic frequency is 40KHz, and the power is 40W. Then soak in 9mol / L HCl for 18h, wash until neutral, and dry to obtain a multi-level porous carbon material.

[0025] Grind the carbon material into powder, take 80 mg of carbon material, 15 mg of acetylene black, 5 mg of PTFE emulsion with a mass fraction of 60%, mix them uniformly with ethanol ultrasonically, heat in a water bath at 65°C until it ...

Embodiment 3

[0029] Clean Artemia egg shells, ball mill for 12 hours, and then use 12mol / L HCl, 18mol / L H 2 SO 4 , 14mol / L HNO 3 And 6mol / L KOH soaking pretreatment, the soaking time is 48h for each substance, and dry to remove water. Calcinate the above-mentioned treated Artemia egg shells in an inert atmosphere, raise the temperature to 300°C at a rate of 5°C / min, keep it for 10h, and then raise the rate of temperature rise to 1000°C at a rate of 10°C / min and keep it for 48h. / L HNO 3 During ultrasonic treatment for 10 hours, the ultrasonic frequency is 40KHz and the power is 50W. Then soak in 9mol / L HCl for 24 hours, wash to neutrality, and dry to obtain a multi-level porous carbon material.

[0030] Grind the carbon material into powder, take 80 mg of carbon material, 15 mg of acetylene black, 5 mg of PTFE emulsion with a mass fraction of 60%, mix them uniformly with ethanol ultrasonically, heat in a water bath at 65°C until it becomes muddy, and then spread 5 mg of mud evenly on t...

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Abstract

A preparation method of a multistage-channel carbon electrode material mainly comprises the following steps: cleaning a halogen egg shell, performing ball milling on the shell for 2-12 hours, performing acid-base soak on the shell for 6-48 hours, after being subjected to calcination in an inert atmosphere, performing ultrasonic treatment on the shell in HNO3, using HCl to soak the shell, washing the shell to be neutral, and drying the shell to obtain a multistage-channel carbon material; grinding the multistage-channel carbon material to powder; mixing the carbon material, acetylene black and PTFE emulsion according to the mass ratio of 80:15:5 uniformly by adopting alcohol ultrasonography; performing water bath at 65 DEG on the mixture to enable the mixture to be heated to be muddy; then taking out 0.5-10 mg muddy product to uniformly coat on a piece of foam nickle of 1*1 cm; drying the foam nickle in the vacuum for 12 hours; and finally performing tabletting on the foam nicke under a pressure of 4 MPa to obtain an electrode piece, and vacuum soaking the electrode piece in an electrolyte solution for 6 hours for reservation. The carbon electrode material is energy-saving, environment-friendly and good in recycling stability of the carbon electrode material; and the discharge specific capacity can reach up to 176 F / g.

Description

technical field [0001] The invention relates to an electrode material, in particular to a preparation method of a carbon electrode material. Background technique [0002] In order to solve the energy crisis caused by the shortage of petroleum resources, people have carried out research and development of hybrid power, fuel cells, and chemical battery products and applications, and achieved certain results. However, they have disadvantages such as short service life, poor temperature characteristics, environmental pollution, complex system, and high cost, so supercapacitors have attracted widespread attention worldwide. Supercapacitor, also known as electric double layer capacitor, electrochemical capacitor, is a new type of energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, no memory effect, energy saving and environmental protection. Especially in information technology, electric vehicles, aeros...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/05
Inventor 赵玉峰冉伟何静高发明
Owner YANSHAN UNIV
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