Oxidizability and reducibility conducting polymer flow anode used for flow battery

A conductive polymer, flow battery technology, used in battery electrodes, fuel cell components, regenerative fuel cells, etc., can solve the problems of aging and deformation of battery materials, large corrosion of graphite electrode plates, and corrosion of battery materials. The effect of battery cost reduction, less environmental pollution, and simple preparation

Inactive Publication Date: 2012-08-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aqueous solution of bromine and bromine salt is corrosive to the battery material, and the long-term operation of the battery will cause the aging and deformation of the battery material, which greatly affects the performance and service life of the battery
[0003] At present, there are several problems in the commercial application of redox flow batteries as follows: (1) Material cost, especially for all-vanadium redox flow batteries, because the vanadium compounds used are scarce materials, it is not only costly to use in large quantities, but also difficult to pass the technology. way to drastically reduce its cost
Bromide and Br used in flow batteries using bromine as the catholyte 3 - 、Br 5 - Ionic stabilizers make the cost higher; (2) environmental protection issues, water-

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Zinc / polyaniline flow battery

[0022] The positive electrode current collector uses graphite felt, and the battery electrolyte composition is 2mol / L ZnCl 2 , 2mol / LNH 4 Cl, the active substance polyaniline content in the catholyte is 100g / L, and the additive is 1g / L. The volume of the negative electrode chamber and the positive electrode chamber is 2.5cm×5cm×0.3cm (width×length×thickness), and the separator of the positive and negative electrodes adopts a 0.6 mm thick polyethylene film. The negative electrode of the battery adopts zinc plate, and the negative electrode liquid is 2mol / LZnCl 2 , 2mol / L NH 4 Cl. The open circuit voltage of the battery is 1.1 volts, the battery charging voltage range is 0.8V-1.8V, the battery discharging voltage range is 1.8V-0.8V, and the charging and discharging current density is 2mA / cm 2 , The flow rate of the flowing electrolyte is 20ml / min, and the Coulombic efficiency is 73%.

Embodiment 2

[0024] Manganese / polyaniline flow battery

[0025] The positive electrode current collector uses graphite felt, and the battery electrolyte composition is 1mol / L MnSO 4 , 1mol / L (NH 4 ) 2 SO 4 , the content of active substance polyaniline in the catholyte is 100g / L, and the additive is 1g / L. The volume of the negative electrode chamber and the positive electrode chamber is 2.5cm×5cm×0.3cm (width×length×thickness), and the separator of the positive and negative electrodes adopts a 0.6 mm thick polyethylene film. The negative pole of the battery is a manganese sheet, and the negative electrolyte is 1mol / L MnSO 4 , 1mol / L (NH 4 ) 2 SO 4 . The open circuit voltage of the battery is 1.3 volts, the battery charge and discharge voltage range is 1.2V-2.6V, and the charge and discharge current density is 1mA / cm 2 , The flow rate of the flowing electrolyte is 20ml / min, and the Coulombic efficiency is 64%.

Embodiment 3

[0027] Zinc / polypyrrole flow battery

[0028] The positive electrode current collector uses graphite felt, and the battery electrolyte composition is 2mol / L ZnCl 2 , 2mol / LNH 4 Cl, the active substance polypyrrole content in the catholyte is 100g / L, and the additive is 1g / L. The volume of the negative electrode chamber and the positive electrode chamber is 2.5cm×5cm×0.3cm (width×length×thickness), and the separator of the positive and negative electrodes adopts a 0.6 mm thick polyethylene film. The negative electrode of the battery adopts zinc plate, and the negative electrode liquid is 2mol / LZnCl 2 , 2mol / L NH 4 Cl. The open circuit voltage of the battery is about 1.2 volts, the battery charging voltage range is 1.2V-2.0V, the battery discharging voltage range is 1.8V-0.8V, and the charging and discharging current density is 2mA / cm 2 , the flow rate of the flowing electrolyte is 20ml / min, and the Coulombic efficiency is 70%.

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Abstract

The invention discloses an oxidizability and reducibility conducting polymer flow anode with used for a flow battery. An oxidizability and reducibility conducting polymer or a conducting polymer and an inorganic substance composite material are dispersed in electrolyte solution to form electrolyte of the flow battery, the electrolyte and a three-dimensional mesh current-collection body commonly constitute an emulsus flow electroactive polymer anode, and anode flow passes an anode chamber in a flowing form in the charging and discharging processes and is used for forming a flow battery system. As the dimension of the conducting polymer and the dimension of the inorganic substance composite material of the conducting polymer are large, the battery can adopt a common porous diaphragm; in addition, the corrosion of a medium system of the electrolyte of the battery used for an electroactive material to a solid current collector is small, and therefore, the environmental pollution is small in the production and using processes; the conducting polymer is rich in source, so as to be prepared on a large scale by an organic synthesis method; and the cost of the flow battery can be greatly lowered.

Description

technical field [0001] The invention relates to the field of high-power secondary liquid flow batteries, in particular to zinc secondary batteries, vanadium secondary batteries, and lithium secondary batteries, which use conductive polymers polyaniline, polypyrrole, and inorganic composite materials as main components. Preparation method of milky flowable cathode material. technical background [0002] With the continuous deterioration of the global environment and people's attention to environmental issues, it is imminent to develop new environmentally friendly and clean energy sources. Redox flow batteries are an energy storage system that has emerged in recent years. It has both the performance of ordinary batteries and fuel cells. It has the advantages of long working life and storage life, fast charge and discharge, and good discharge depth performance. At the same time, the closed circulation system avoids contact with the outside world and has little environmental pol...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M8/02H01M8/18
CPCY02E60/50
Inventor 司士辉司睿李建文
Owner CENT SOUTH UNIV
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