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Preparation method for biomass base active carbon electrode material

A technology of biomass materials and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of limited improvement in the electrical properties of activated carbon, and achieve high power density

Inactive Publication Date: 2018-02-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the improvement of the electrical properties of activated carbon mentioned in patents and literature is limited, so it is urgent to study electrode materials with large specific capacitance, high energy density and long cycle life.

Method used

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  • Preparation method for biomass base active carbon electrode material
  • Preparation method for biomass base active carbon electrode material
  • Preparation method for biomass base active carbon electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Place the kapok fibers in deionized water at 95°C, cook for 3 h, then take out the kapok fibers, filter and dehydrate, soak in 10% hydrogen peroxide, oxidize at 80°C for 4 h, take out the oxidized kapok fibers, and wash them with deionized water Remove the oxidizing agent, filter and dehydrate. The oxidized kapok fibers were immersed in a mixed solution of ethylenediaminetetraacetic acid and KOH with a molar ratio of 1.0:4.0 for 12 h and dried at 70 °C to obtain a carbonized precursor. The carbonized precursor was placed in a tubular atmosphere furnace, and the temperature was raised to 500 °C at 5 °C / min. 2 carbonization under atmosphere, N 2 The flow rate is 200 ml / min, and the carbonization time is 2 h; the temperature of the tubular atmosphere furnace is naturally cooled, and the material is discharged and ground to obtain the carbonized product. According to the ratio of KOH to carbide weight ratio of 4.0:1.0, the carbide and KOH were mixed in deionized water, st...

Embodiment 2

[0031] Put the catkins in deionized water at 95°C, cook for 3 h, then take out the catkins, filter and dehydrate, soak in 10% hydrogen peroxide, oxidize at 80°C for 4 h, take out the oxidized catkins, wash with deionized water to remove the oxidizing agent , filtered and dehydrated. The oxidized catkins were immersed in a mixed solution of ethylenediaminetetraacetic acid and KOH with a molar ratio of 1.0:4.0, immersed for 12 h, and dried at 70 °C to obtain a carbonized precursor. The carbonized precursor was placed in a tube atmosphere furnace, and the temperature was raised to 500 °C at a rate of 5 °C / min. 2 carbonization under atmosphere, N 2 The flow rate is 200 ml / min, and the carbonization time is 2 h; the temperature of the tubular atmosphere furnace is naturally cooled, and the material is discharged and ground to obtain the carbonized product. According to the ratio of KOH to carbide weight ratio of 4.0:1.0, the carbide and KOH were mixed in deionized water, stirred ...

Embodiment 3

[0033]Put the cotton fibers in deionized water at 95°C, cook for 3 h, then take out the cotton fibers, filter and dehydrate, soak in 8% hydrogen peroxide, oxidize at 80°C for 4 h, take out the oxidized cotton fibers, and wash with deionized water Remove the oxidizing agent, filter and dehydrate. The oxidized cotton fibers were immersed in a mixed solution of ethylenediaminetetraacetic acid and NaOH with a molar ratio of 1.0:3.0, soaked for 12 h, and dried at 70 °C to obtain a carbonized precursor. The carbonized precursor was placed in a tubular atmosphere furnace, and the temperature was raised to 500 °C at 5 °C / min. 2 carbonization under atmosphere, N 2 The flow rate is 200 ml / min, and the carbonization time is 2 h; the temperature of the tubular atmosphere furnace is naturally cooled, and the material is discharged for grinding to obtain the carbonized product. According to the ratio of zinc chloride to carbide weight ratio of 5.0:1.0, the carbide and zinc chloride were m...

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Abstract

The invention provides a preparation method for a biomass base active carbon electrode material and relates to the field of preparation of electrode materials. The method includes steps of oxidizationof biomass material; mixed solution dipping of organic amine and an alkali compound; carbonization; mixing with an activator; activation, wherein the activation temperature is 500 to 1000 DEG C, thepreferred temperature is 500 to 800 DEG C and the optimal temperature is 500 to 650 DEG C; cleaning and drying through which active carbon material used for an electrode of a super capacitor is acquired; and electric performance testing. The product prepared in the invention is high in energy density and long in service life when being applied to the super capacitor.

Description

technical field [0001] The invention relates to the field of preparation of activated carbon electrode materials, and specifically discloses a method for preparing carbon electrode materials with high energy density and long cycle life by using plant-based biomass as a raw material, first undergoing pretreatment, and then undergoing carbonization and medium-low temperature activation. Background technique [0002] With the rapid development of economy and society, the problem of energy shortage and environmental pollution caused by the combustion of fossil fuels has become increasingly prominent, and it is imminent to find a high-performance, low-cost, and environment-friendly energy storage device. Supercapacitor is a new type of fast energy storage device between capacitors and chemical batteries, which has the advantages of high power density, long cycle life, and fast charge and discharge. It has important application prospects in the fields of communication, industry, a...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/34
CPCY02E60/13H01G11/86H01G11/34
Inventor 杨儒邬良李敏
Owner BEIJING UNIV OF CHEM TECH
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