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Inorganic matter-filled poriferous composite membrane for liquid flow energy-storage cell and use thereof

A liquid flow energy storage battery and composite membrane technology, which is applied in the direction of fuel cells, battery pack parts, fuel cell parts, etc., can solve the problems of reducing the pore size and achieve easy mass production, improve conductivity, The effect of improving barrier properties

Active Publication Date: 2012-07-11
DALIAN RONGKE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, when the pore size of this kind of porous membrane is small to a certain extent, it will be more difficult to continue to reduce the pore size. How to further reduce the membrane pore size to achieve a higher degree of separation and improve the ion-selective permeability of the membrane has become a solution to this type of membrane. an important question of

Method used

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  • Inorganic matter-filled poriferous composite membrane for liquid flow energy-storage cell and use thereof
  • Inorganic matter-filled poriferous composite membrane for liquid flow energy-storage cell and use thereof
  • Inorganic matter-filled poriferous composite membrane for liquid flow energy-storage cell and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Dissolve 7.5 grams of polyacrylonitrile in 50ml of DMSO, stir for 5 hours, spread the polymer solution on a glass plate, then quickly immerse in 5L of water, solidify, and form a porous diaphragm. Figure 4 A cross-sectional SEM picture of the prepared membrane material is given, showing a regular pore structure.

[0041] Soak the prepared porous membrane in deionized water for 1 hour, take it out, and immerse it in tetraethyl orthosilicate for 2 hours to obtain a silicon dioxide-doped porous composite membrane. Then the porous composite membrane was taken out and dried in vacuum at 60° C. for 6 h. Finally, the porous composite membrane was immersed in 1M sulfuric acid for 24h.

[0042] The all-vanadium flow energy storage battery is assembled by using the prepared porous composite membrane, in which the catalytic layer is activated carbon felt, the bipolar plate is graphite plate, and the effective area of ​​the membrane is 9cm -2, with a current density of 80mA cm ...

Embodiment 2

[0046] 13.5g of polysulfone and 1.5g of sulfonated polyether ether ketone were dissolved in 45g of nitrogen methylpyrrolidone and stirred for 5 hours, and the obtained polymer solution was evenly spread on a glass plate, quickly immersed in 5L of water, and cured for 1 hour to form a porous diaphragm.

[0047] Soak the obtained porous membrane in deionized water for 1 hour, take it out, and then soak it in tetraethyl orthosilicate for 2 hours to obtain a silicon dioxide-doped porous composite membrane. Then the porous composite membrane was taken out and dried in vacuum at 60° C. for 6 h. Finally, the porous composite membrane was soaked in 1M sulfuric acid for 24h.

[0048] The all-vanadium flow energy storage battery is assembled by using the prepared silicon dioxide-filled porous composite membrane, the catalytic layer is activated carbon felt, the bipolar plate is graphite plate, and the effective area of ​​the membrane is 9cm -2 , with a current density of 80mA cm -2 , ...

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Abstract

The invention discloses an inorganic matter-filled poriferous composite membrane for a liquid flow energy-storage cell and a use thereof. The inorganic matter-filled poriferous composite membrane for a liquid flow energy-storage cell is characterized in that one or more of organic polymer resins and sulfonated organic polymer resins are prepared into a poriferous diaphragm as a matrix; inorganic matter particles are filled into apertures of the matrix so that the inorganic matter-filled poriferous composite membrane is obtained; and the inorganic matter particles are prepared from one or more of silicon oxide, zirconia, titanium oxide, lead oxide, tungsten oxide and zirconium phosphate. The inorganic matter-filled poriferous composite membrane can be prepared by simple processes, has controllable apertures, is suitable for large-scale production, has high ion selectivity, hydrophily and ion conductivity, can realize ion transport without introduction of any ion exchange groups, and broadens a selection scope of liquid flow energy-storage cell membrane materials.

Description

technical field [0001] The invention relates to a polymer electrolyte diaphragm material for a liquid flow energy storage battery, in particular to a composite film filled with inorganic substances and a preparation method thereof, as well as its application in a liquid flow energy storage battery. Background technique [0002] Liquid flow energy storage battery is a new electrochemical energy storage technology. Compared with other energy storage technologies, it has high energy conversion efficiency, flexible system design, large storage capacity, free location selection, deep discharge, safety and environmental protection, and maintenance. With the advantages of low cost, it can be widely used in wind energy, solar energy and other renewable energy generation and energy storage, emergency power system, backup power station and power system peak shaving and valley filling. Vanadium redox battery (VRB) is considered to be the most advanced energy storage battery due to its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16H01M8/0241
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 张华民张洪章李先锋
Owner DALIAN RONGKE POWER
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