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Polymer film applied to redox flow battery and preparation method and application thereof

A polymer membrane and liquid flow battery technology, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve problems such as complex processes and development limitations, and achieve the effects of simple preparation process, overall performance optimization, and good mechanical properties

Inactive Publication Date: 2016-07-06
THE HONG KONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the precise adjustment of the pore size to achieve the effect of transporting small hydration size protons and blocking vanadium ions, the process is complicated and its development is limited.

Method used

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  • Polymer film applied to redox flow battery and preparation method and application thereof
  • Polymer film applied to redox flow battery and preparation method and application thereof
  • Polymer film applied to redox flow battery and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] In an embodiment of the present invention, a polymer membrane applied to a flow battery includes a hydrophilic phase A and a hydrophobic phase B, the hydrophilic phase A is polyvinylpyrrolidone, the hydrophobic phase B is polysulfone, and the mass fraction of the hydrophilic phase A is 20-70%.

[0046] The preparation method comprises the steps of:

[0047] Mix the hydrophilic polymer A polyvinylpyrrolidone (molecular weight: 29-1300 kg / mol) and the hydrophobic polymer B polysulfone (molecular weight: 77-83 kg / mol) in proportion. The mixed polymer was dissolved in N,N-dimethylformamide (DMF), and stirred at room temperature for 12-24h. After the polymer is completely dissolved to form a homogeneous film solution, the film solution is placed on the surface of a clean glass plate, and the thickness of the liquid film is adjusted with an adjustable applicator. Place the film-coated glass plate in a strong convection oven and bake at 120-140°C for 6-20h. After the organi...

Embodiment 2

[0052] In an embodiment of the present invention, a polymer membrane applied to a flow battery includes a hydrophilic phase A and a hydrophobic phase B, the hydrophilic phase A is polyvinylpyrrolidone, the hydrophobic phase B is polysulfone, and the mass fraction of the hydrophilic phase A is 20-70%.

[0053] The preparation method comprises the steps of:

[0054] Mix the hydrophilic polymer A polyvinylpyrrolidone (molecular weight: 29-1300 kg / mol) and the hydrophobic polymer B polysulfone (molecular weight: 77-83 kg / mol) in proportion. Dissolve the mixed polymer in N,N-dimethylformamide (DMF), control the dissolution temperature between 20-80°C to obtain a polymer solution, and the mass percentage of organic solvent is 80-95% . A high-voltage electrospinning device was used to prepare the polymer film, the distance between the spinneret and the collecting plate was maintained at 10-20 cm, the spinning voltage was 10-20 kV, and the solution flow rate was 0.5-2 mL / min. Soak ...

Embodiment 3

[0059] In an embodiment of the present invention, a polymer membrane applied to a flow battery includes a hydrophilic phase A and a hydrophobic phase B, the hydrophilic phase A is polystyrene sulfonic acid, the hydrophobic phase B is chitosan, and the hydrophilic phase A The mass fraction is 20-70%.

[0060] The preparation method comprises the steps of:

[0061] Mix the hydrophilic polymer A polystyrene sulfonic acid and the hydrophobic polymer B chitosan in proportion. The mixed polymer was dissolved in N-methylpyrrolidone (NMP), and stirred at room temperature for 12-24h. After the polymer is completely dissolved to form a homogeneous film solution, the film solution is placed on the surface of a clean glass plate, and the thickness of the liquid film is adjusted with an adjustable applicator. Place the coated glass plate in a strong convection oven and bake at 60-80°C for 6-20h. After the organic solvent is completely volatilized, the temperature of the oven is slowly l...

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Abstract

The invention discloses a polymer film applied to a redox flow battery. The polymer film comprises a hydrophilic phase A and a hydrophobic phase B, wherein the mass percent of the hydrophilic phase A accounts for 10-80% of the polymer film, the hydrophilic phase A is arbitrary one of a hydrophilic macromolecule polymer, a cationic polymer and an anionic polymer, and the hydrophobic phase B is an aliphatic macromolecule polymer or an aromatic macromolecule polymer. The polymer film disclosed by the invention can be applied to the redox flow battery of an acidic electrolyte; and when the polymer film is applied to an all vanadium redox flow battery, the current efficiency of the battery reaches over 94%, the energy efficiency reaches over 75-90%, and the valid running time exceeds 2,000 hours.

Description

technical field [0001] The invention relates to the technical field of flow batteries, in particular to a polymer film applied to flow batteries, a preparation method and application thereof. Background technique [0002] Energy is the basis of human existence and the driving force of social development, and the rational development and utilization of energy has attracted much attention. my country is a big country in energy production and consumption in the world. With the rapid development of my country's economy, the demand for energy will increase. However, the depletion of traditional fossil energy and the accompanying environmental pollution problems are also becoming more and more serious. Renewable energy such as solar energy and wind energy has become an effective way to solve the problems of energy shortage, environmental pollution and greenhouse effect caused by the development and utilization of fossil energy due to its unlimited reserves, clean development and u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1041H01M8/1069H01M8/18
CPCH01M8/1041H01M8/1069H01M8/188Y02E60/50
Inventor 赵天寿曾林
Owner THE HONG KONG UNIV OF SCI & TECH
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