High-strength ultrathin integrated proton exchange membrane

A proton exchange membrane and proton exchange technology, applied in the field of electrochemical energy storage, can solve problems such as phase separation, achieve the effects of avoiding phase separation, reducing internal resistance, and ensuring mechanical strength and stability

Pending Publication Date: 2020-12-08
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

[0004] The present invention mainly aims at the contradictory problem of ion selectivity and ion conductivity of the traditional proton exchange membrane, and proposes a high-strength ultra-thin integrated proton exchange membrane, which is "strengthened" by direct processing on the surface of the proton exchange membrane with excellent ion selectivity. "rib" as a support structure solves the problem of phase separation between the support layer and the ion-selective layer in the existing method, greatly improves the mechanical strength and mechanical stability of the proton exchange membrane, and its preparation process is simple, strong in operability, and convenient mass production

Method used

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  • High-strength ultrathin integrated proton exchange membrane
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  • High-strength ultrathin integrated proton exchange membrane

Examples

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Embodiment 1

[0042] In this example, the high-strength ultra-thin integrated proton exchange membrane obtained by the above method was subjected to physical characterization, electrochemical detection and battery performance detection. Such as figure 1 As shown, micron-sized rectangular parallelepiped "reinforcing ribs" are processed on the upper and lower sides of the commercial PBI proton exchange membrane, so that the proton exchange membrane is an integral structure composed of the membrane part and the reinforcing ribs on both sides; among them, the rectangular parallelepiped on each side The "reinforcing ribs" are relatively parallel arranged as a supporting layer, the height of the supporting layer is 10-30 μm, the width of each cuboid "reinforcing rib" is 0.1-3 μm, and the gap between two adjacent cuboid "reinforcing ribs" is 0.2-20 μm ; The film part is used as a functional layer, and the thickness of the functional layer is 4-10 μm.

[0043] Such as figure 2 As shown, with the...

Embodiment 2

[0047] The same as in Example 1, except that the commercialized PBI membrane is replaced by other materials or composite membranes of PBI and other materials, such as: composite membranes of PBI and Nafion, PBI membranes and sulfonated polyetheretherketone (sulfonatedpolyetheretherketone) (SPEEK)) composite membrane, PBI and polyacrylonitrile (polyacrylonitrile (PAN)) composite membrane, PBI and sulfonated polyimide (sulfonated polyimide (SPI)) composite membrane, and PBI and polyphenylene sulfone ( Polyphenylene sulfone (PPSU)), polysulfone (polysulfone (PSF)), polyethersulfone (polyethersulfone (PES)), perfluoroether copolymer (polyfluoroether (PFE)), ketone sulfone copolymer (Polyfluoroether ketonesulfone (PAEKS)), Polyether ketone (polyphthalone ether ketone (PEK)), polyvinylidene fluoride (polyvinylidene fluoride (PVDF)), polyimide (polyimide (PI)), polyurethane (polyurethane (PU)), polyvinyl chloride (Polyvinyl Chloride (PVC)), polyvinyl alcohol (PVA), polytetrafluoroeth...

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Abstract

The invention relates to the field of electrochemical energy storage, in particular to a high-strength ultrathin integrated proton exchange membrane. Mutually perpendicular micron-sized reinforcing ribs are processed on two sides of the proton exchange membrane with excellent ion selectivity by adopting an advanced femtosecond processing or micro-nano imprinting technology, so that the reinforcingribs on the upper side and the lower side are used as supports, and the ultrathin middle layer realizes the construction of the high-strength ultrathin integrated proton exchange membrane with ion selectivity. The reinforcing ribs on the two sides of the proton exchange membrane can greatly reduce the thickness of the middle layer and ensure that the middle layer has high mechanical strength, andtherefore the internal resistance of the proton exchange membrane and the internal resistance of the whole battery can be greatly reduced on the premise that the mechanical strength and stability ofthe proton exchange membrane are ensured. According to the invention, by utilizing the characteristic of excellent ion selectivity and combining with advanced processing means which are easy for large-scale production, such as femtosecond processing or micro-nano imprinting, the preparation and batch production of the high-strength ultrathin integrated proton exchange membrane can be realized.

Description

technical field [0001] The invention relates to the field of electrochemical energy storage, and specifically refers to a high-strength ultra-thin integrated proton exchange membrane, which can be widely used in liquid flow batteries, fuel cells, and the like. Background technique [0002] In recent years, problems such as fossil energy and the greenhouse effect have intensified, and it is more urgent to increase the proportion of renewable clean energy such as wind energy and solar energy in energy consumption. However, the power generation of wind energy and solar energy is very unstable, and the direct grid-connected power generation of renewable energy will bring a great impact to the power grid. In my country, about 100 billion kWh of wind energy and solar energy are discarded every year. Therefore, how to make full use of wind energy and solar power generation has become the key to increasing the proportion of renewable energy in energy consumption. Hydrogen fuel cell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0202H01M8/1065H01M8/1067H01M8/18
CPCH01M8/0202H01M8/1065H01M8/1067H01M8/188H01M2250/10H01M2250/20Y02E60/50
Inventor 赵天寿范新庄王振宇
Owner THE HONG KONG UNIV OF SCI & TECH
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