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A kind of porous carbon electrode material and preparation method thereof

A porous carbon electrode and porous carbon technology, applied in the direction of circuits, capacitors, electrical components, etc., can solve the problems of difficult to buy raw materials and low capacitance, achieve excellent electrochemical capacitance performance, high chemical purity, and facilitate infiltration Effect

Inactive Publication Date: 2011-12-14
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because most of the biological raw materials are affected by the natural environment such as region and climate, the raw materials are not easy to buy and the capacitance is not high enough to meet the requirements of modern electrode materials and electromotive development.

Method used

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  • A kind of porous carbon electrode material and preparation method thereof
  • A kind of porous carbon electrode material and preparation method thereof
  • A kind of porous carbon electrode material and preparation method thereof

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Experimental program
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Embodiment

[0022] 1. Preparation of porous carbon: sucrose, water, concentrated H 2 SO 4 Mix 20 mL each of sucrose, water, and sulfuric acid solution at a mass ratio of 5:10:1, shake at room temperature on a shaker for 2 h, then heat in an oven at 100 °C for 4 h to remove moisture, keep at 150 °C for 2 h, and then Put it into a tubular resistance furnace at 600°C, 700°C, 800°C, and 900°C for carbonization in a nitrogen atmosphere for 5 hours to make porous carbon, which is not recorded as C-1, C-2, C-3, and C-4.

[0023] Table 1 below shows the pore structure parameters of C-1, C-2, C-3, and C-4. It can be seen from Table 1 that most of the porous carbons are microporous structures.

[0024] Table 1:

[0025] C-1

C-2

C-3

C-4

Specific surface area (m 2 / g)

178.7

234.5

603.4

546.1

Pore ​​volume (cm 3 / g)

0.103

0.129

0.287

0.263

Pore ​​volume (cm 3 / g)

0.056

0.079

0...

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Abstract

The invention discloses a method for preparing a porous carbon material with high specific surface area, large capacitance and good capacitance cycle stability by using carbonized sucrose. The present invention mainly comprises following 3 aspects 1) select sucrose as raw material cheap, chemical purity is high, easy to buy; , 800°C, 900°C by nitrogen gas carbonization for 90min to obtain a porous carbon sample; 3) Select a KOH aqueous solution with a mass concentration of 30% as the electrolytic night, and use cyclic voltammetry and chronopotentiometry to test the prepared porous carbon sample , at a current density of 100mA / g, a large capacitance of 232.6F / g is obtained; after 1000 cycles at a current density of 1A / g, the capacitance loss rate is less than 5%. The test results show that the porous carbon sample electrode prepared by sucrose at 800°C has large capacitance and good cycle stability.

Description

Technical field: [0001] The invention belongs to the field of electrochemistry and new energy materials, and relates to a method for preparing a porous carbon electrode material using sucrose as a raw material, and the electrode material is used for a supercapacitor. Background technique [0002] Electrochemical capacitors, also known as supercapacitors, are divided into two types: electric double layer supercapacitors and pseudocapacitance supercapacitors. They are a new type of energy storage device between ordinary capacitors and secondary batteries. The specific power is higher than that of the battery, it can be charged and discharged quickly, the cycle life is long, and the low temperature performance is good. High-performance electric double-layer capacitors have broad application prospects in mobile communications, aerospace, electric vehicles, and national defense. Electrode materials for electric double layer capacitors should have a large surface for charge accum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
Inventor 郭培志赵修松顾毅雷志斌
Owner QINGDAO UNIV