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Method for preparing high performance electrode material

An electrode material and high-performance technology, which can be used in cable/conductor manufacturing, hybrid/electric double-layer capacitor manufacturing, circuits, etc., and can solve problems such as material performance stability defects, complex processes, and carbon nanofiber damage.

Inactive Publication Date: 2010-12-15
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

JP2006 / 302294 and CN1942985A propose to add carbon nanofibers to the electrode material as a conductive component, and obtain electrode materials with better performance through multi-step processes such as organic matter dispersion and sintering, but the process is complicated and the high-temperature carbonization and sintering process affects the pore structure of the material Larger, not conducive to the improvement of comprehensive performance
In JP2001-135554, the method of directly mixing activated carbon and carbon nanofibers is used to manufacture electrodes, but due to the self-aggregation phenomenon of nanofibers, it is not easy to mix evenly. The ball milling process has serious damage to carbon nanofibers, and there are defects in the stability of material properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: 10 grams of nickel sulfate, 1 gram of polyvinyl alcohol, 30 grams of ethylene glycol, and 30 grams of deionized water were blended and stirred to dissolve, placed at 80°C for 24 hours, and 30 grams of BET was added with a specific surface area of ​​2100m 2 / g of pitch-based activated carbon, stirred, placed at room temperature for 12 hours, and added ammonia water to adjust the pH value at 7. Then dry at 90°C. Put the prefabricated material into a vertical carbonization activation furnace for heating, nitrogen is the protective gas, the heating rate is 10°C / min, the temperature is raised to 350°C, and the temperature is kept constant for 120 minutes, then hydrogen is introduced for reduction for 60 minutes, and the temperature is continued to rise to 650°C, and natural gas / A mixed gas composed of hydrogen, with a volume ratio of 50%, and a flow rate of 50 ml / min were used for vapor deposition for 5 hours. The temperature of the system was adjusted to 850°C,...

Embodiment 2

[0024] Example 2: 50 grams of ferric nitrate, 15 grams of polyvinyl alcohol, 200 grams of glycerin, and 150 grams of deionized water were blended and stirred to dissolve, placed at 40°C for 24 hours, and 180 grams of BET was added with a specific surface area of ​​2400m 2 / g of phenolic carbon, stirred, placed at room temperature for 12 hours, and added excess ammonia water to adjust the pH value at 8. Then dry at 110°C. Put the pre-deposited activated carbon material into a vertical carbonization activation furnace to heat, nitrogen is the protective gas, the heating rate is 0.5°C / min, the temperature is raised to 300°C, and the temperature is kept constant for 60 minutes, then hydrogen is introduced for reduction for 180 minutes, and the temperature is continued to be raised to At 900° C., gas phase deposition was carried out for 1 hour by feeding a mixed gas composed of natural gas / nitrogen with a volume ratio of 80% and a flow rate of 150 ml / min. The temperature of the sy...

Embodiment 3

[0025] Example 3: 50 grams of cobalt nitrate, 10 grams of nonionic surfactant OP-6, 100 grams of glycerol, 50 grams of ethanol, and 100 grams of deionized water were blended and stirred to dissolve, placed at 60 ° C for 24 hours, and added 200 Gram BET specific surface area is 3100m 2 / g of petroleum coke-based activated carbon, stirred, placed at room temperature for 12 hours, and added excess ammonia water to adjust the pH value between 9. Then dry at 140°C. Put the prefabricated carbon material into a vertical carbonization activation furnace to heat, nitrogen is the protective gas, the heating rate is 5°C / min, the temperature is raised to 400°C, and the temperature is kept constant for 60 minutes, then hydrogen is introduced for reduction for 120 minutes, and the temperature is continued to rise to 900°C at 15°C / min. °C, a mixed gas composed of propane / hydrogen was introduced, with a volume ratio of 30%, and a flow rate of 500 ml / min for vapor deposition for 1 hour. The ...

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PUM

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Abstract

The invention relates to a method for preparing a high-performance electrode material; a VIIIB metallic compound, a surface active agent, organic alcohol and water are mixed according to the mass ratio of 100: 10 to 150: 50 to 300: 50 to 300 and dissolved to prepare sol, added with active carbon, stirred, placed stilly, neutralized by alkali for deposition, dried, reduced for 60 to 180min at the temperature between 350 DEG C and 500 DEG C under the atmosphere of hydrogen gas, heated to between 600 DEG C and 1100 DEG C and fed with the mixed gas of carbon source gas and indifferent gases for carrying out chemical vapor deposition so as to produce carbon nano-fibers. Then vapor is fed for carrying out activation. The method has the advantages of simple process, material with stable performance, high specific surface area and high electrical conductivity.

Description

[0001] Field [0002] The invention relates to a method for manufacturing electrode materials, in particular to a method for preparing activated carbon / carbon nanofiber composite functional materials. technical background [0003] As a new type of energy device, the electric double layer supercapacitor has the dual functions of capacitor and battery. Its power density is much higher than that of ordinary batteries, and its energy density is much higher than that of traditional physical capacitors. It can be used as a new type of storage device. Backup power for portable devices, etc. The focus of electric double layer supercapacitor technology is low-cost electrode materials required for energy density and power density, and electrolyte systems with high operating voltage, stable electrochemical performance, high conductivity and long service life. [0004] The structure and properties of electrodes play a decisive role in the performance of capacitors. The electrode material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/04H01B13/00H01G9/058C01B31/02B82B1/00H01G11/86
Inventor 李开喜谷建宇
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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