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Preparation method and application of modified carbon cloth

A technology for modifying carbon and carbon cloth, which is used in fuel cells, regenerative fuel cells, electrical components, etc., to achieve the effects of easy operation, simple equipment, and improved conductivity.

Active Publication Date: 2021-01-15
中海储能科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main application fields of existing carbon cloth do not include electrode materials. Carbon cloth manufacturers are mainly committed to the improvement of its mechanical strength and other properties. If carbon cloth is used in batteries, its electrochemical performance needs to be improved and enhanced.

Method used

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  • Preparation method and application of modified carbon cloth
  • Preparation method and application of modified carbon cloth
  • Preparation method and application of modified carbon cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a preparation method of modified carbon cloth, including:

[0043] Commercially available carbon cloth was first pretreated: soaked in concentrated sulfuric acid solution for 10 hours, then washed and dried.

[0044] 1) Zinc salt and surfactant are made into zinc salt solution, and the carbon cloth is immersed in the zinc salt solution.

[0045] The proportioning of the zinc salt solution is: by 30g Zn(CH 3 COO) 2 2H 2 O and 10g of polyethylene glycol (PEG400) were added to 100g of water to prepare a solution, ultrasonicated for 15 minutes to obtain a zinc salt solution, and the carbon cloth was immersed in the zinc salt solution for 2 hours and then taken out.

[0046] 2) The carbon cloth obtained in step 1) was dried and calcined; the calcining temperature was 280° C. for 1.5 hours.

[0047] A single battery was assembled with the modified carbon cloth of this embodiment, and the structure of the battery was the same as that of the test ex...

Embodiment 2

[0050] This embodiment provides a preparation method of modified carbon cloth. The pretreatment and step 1) are basically the same as in Example 1, except that 40g Zn(CH 3 COO) 2 2H 2 The ratio of O to 10g polyethylene glycol (PEG400) added to 100g water is used to prepare zinc salt solution.

[0051] A single battery was assembled with the modified carbon cloth of this embodiment, and the structure of the battery was the same as that of the test example; the internal resistance of the battery was 1.3 milliohms.

Embodiment 3

[0053] This embodiment provides a preparation method of modified carbon cloth. The pretreatment and step 1) are basically the same as in Example 1, except that 20g Zn(CH 3 COO) 2 2H 2 The ratio of O to 10g of polyethylene glycol (PEG400) added to 100g of water to make a zinc salt solution.

[0054] A single battery was assembled with the modified carbon cloth of this embodiment, and the structure of the battery was the same as that of the test example; the internal resistance of the battery was 1.4 milliohms.

[0055] The result of comparative example 1-3, the proportioning of preferred zinc salt solution is by 30g Zn(CH 3 COO) 2 2H 2The ratio of O to 10g polyethylene glycol (PEG400) added to 100g water was prepared.

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Abstract

The invention provides a preparation method and application of modified carbon cloth. The preparation method comprises the following steps: 1) preparing a zinc salt aqueous solution from zinc salt anda surfactant, and immersing carbon cloth into the zinc salt aqueous solution; 2) drying and roasting the carbon cloth obtained in the step 1) at the roasting temperature of 150-400 DEG C, and 3) modifying the carbon cloth obtained in the step 2) with a Nafion solution. According to the preparation method of the modified carbon cloth provided by the invention, zinc salt and the Nafion solution areused for modifying the carbon cloth, so that the conductivity of the carbon cloth serving as an electrode material is improved, and the internal resistance of a battery is reduced.

Description

technical field [0001] The invention belongs to the technical field of energy materials, and in particular relates to the preparation and application of an electrode material. Background technique [0002] Redox flow battery is a new type of battery that has attracted much attention in recent years. The battery uses liquid electrolyte as the electrode active material. The structural materials of the battery can be carbon materials, engineering plastics, etc., and the price is low; the battery can be extremely Large capacity and safety are guaranteed; because the power and capacity of the battery are designed independently of each other, charging and discharging, and capacity adjustment are very flexible. [0003] The main key materials of flow batteries include electrodes, separators and electrolytes. At present, the main electrode material is carbon felt (such as patent CN201310115553.7-the treatment method of carbon felt electrode of vanadium battery, CN201610738841.1-ele...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/96H01M8/18
CPCH01M4/8673H01M4/8803H01M4/96H01M8/188Y02E60/50
Inventor 不公告发明人
Owner 中海储能科技(北京)有限公司
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