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Carbon felt conductivity test method

A test method and conductivity technology, which is applied in the field of conductivity testing of carbon felt, can solve the problems of large error, uneven conductivity of carbon fiber, large dispersion of results, etc., to achieve small error, easy testing, and small dispersion Effect

Inactive Publication Date: 2015-06-17
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in fact, carbon felt is different from both carbon fiber and carbon fiber resin composite materials. The electrical conductivity of carbon felt depends not only on the conductivity of carbon fibers, but also on the volume content of carbon fibers and the orientation and arrangement of carbon fibers. Influenced by the volume content, orientation and arrangement of carbon fibers, the electrical conductivity of carbon fibers has inhomogeneity
After testing, it was found that the resistivity test method disclosed in the above-mentioned patent, because the sample is soft and has a certain degree of elasticity, will inevitably change the shape and density of the carbon felt during the resistance measurement, so that the measured results are highly dispersed , big error

Method used

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  • Carbon felt conductivity test method

Examples

Experimental program
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Effect test

specific Embodiment example 1

[0019] Use oil bath heating to reach 300°C to heat solid sulfur to form liquid sulfur, usually the heating temperature requirement can be met;

[0020] Cutting and forming a soft and easily deformable carbon felt with a cross-sectional area S of 10mmX10mm and a length L of 100mm in the shape of a three-dimensional rectangular strip using directly purchased carbon felt, completely soaking the carbon felt into the liquid sulfur, and then taking it out and soaking it completely carbon felt to form impregnated carbon felt;

[0021] The impregnated carbon felt is taken out from the liquid sulfur and placed at room temperature, and the impregnated carbon felt is left to cool, and the liquid sulfur absorbed in the impregnated carbon felt is cooled and solidified, and the impregnated carbon felt is also Subsequently, the cooling shape is fixed, forming a solid carbon felt with a fixed shape with the cross-sectional area S being 10mm×10mm and the length L being 100mm;

[0022] Put the...

specific Embodiment example 2

[0025] Use oil bath heating to reach 315°C to heat solid sulfur to form liquid sulfur, and the usual conditions can meet the heating temperature requirements;

[0026] Cutting and forming a soft and easily deformable carbon felt with a cross-sectional area S of 10mmX10mm and a length L of 100mm in the shape of a three-dimensional rectangular strip using directly purchased carbon felt, completely soaking the carbon felt into the liquid sulfur, and then taking it out and soaking it completely carbon felt to form impregnated carbon felt;

[0027] The impregnated carbon felt is taken out from the liquid sulfur and placed at room temperature, and the impregnated carbon felt is left to cool, and the liquid sulfur absorbed in the impregnated carbon felt is cooled and solidified, and the impregnated carbon felt is also Subsequently, the cooling shape is fixed, forming a solid carbon felt with a fixed shape with the cross-sectional area S being 10mm×10mm and the length L being 100mm; ...

specific Embodiment example 3

[0031] Oil bath heating is used to reach 330°C to heat solid sulfur to form liquid sulfur, and the heating temperature requirements can be met under normal conditions;

[0032] Cutting and forming a soft and easily deformable carbon felt with a cross-sectional area S of 10mmX10mm and a length L of 100mm in the shape of a three-dimensional rectangular strip using directly purchased carbon felt, completely soaking the carbon felt into the liquid sulfur, and then taking it out and soaking it completely carbon felt to form impregnated carbon felt;

[0033] The impregnated carbon felt is taken out from the liquid sulfur and placed at room temperature, and the impregnated carbon felt is left to cool, and the liquid sulfur absorbed in the impregnated carbon felt is cooled and solidified, and the impregnated carbon felt is also Subsequently, the cooling shape is fixed, forming a solid carbon felt with a fixed shape with the cross-sectional area S being 10mm×10mm and the length L being...

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Abstract

A carbon felt conductivity test method used for testing the conductivity of a carbon felt is characterized by comprising the following concrete steps of heating the solid sulfur to form the liquid sulfur at a temperature between 300 DEG C and 330 DEG C; completely infiltrating the carbon felt having a cross-section S and a length D in the liquid sulfur and then taking out to form the infiltrated carbon felt; placing the infiltrated carbon felt at an indoor temperature to cool and cure the liquid sulfur absorbed in the infiltrated carbon felt to thereby obtain the solid carbon felt; immerging the solid carbon felt in an NaOH solution of which the concentration is between 20% and 50% for 10 minutes to 30 minutes, and then taking out the carbon felt and washing with water, and finally drying to form the processed and finished carbon felt; carrying out resistance measurement on the processed and finished carbon felt to obtain the resistance value R; obtaining the conductivity of the carbon felt via a conductivity formula calculation method or a direct measurement method.

Description

technical field [0001] The invention relates to an electrical conductivity testing method, in particular to a carbon felt electrical conductivity testing method for testing the electrical conductivity of carbon felt. Background technique [0002] Due to its advantages of heat resistance, corrosion resistance, good mechanical strength, large surface area and high electrical conductivity, carbon felt has been widely used in various new electrochemical energy storage systems such as redox flow batteries in the past ten years. electrode material. In practical applications, it is necessary to test the electrical properties of carbon felt as an electrode material, including electrical conductivity. [0003] The patent test method for electrical conductivity of carbon fiber and its resin composite material (Fibre content of unidirectional fiber resin compositer by electrical resistivity. ASTM D3355‐74 (80)) discloses a test method for the electrical resistivity of carbon fiber and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
Inventor 刘新宽刘红刘平陈小红邱广玮马凤仓李伟何代华
Owner UNIV OF SHANGHAI FOR SCI & TECH
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