Bipolar membrane for fuel cell and preparation method of bipolar membrane

A fuel cell and bipolar membrane technology, applied in fuel cells, circuits, electrical components, etc., can solve the problem of low conductivity of alkaline ion exchange membranes, achieve the effect of reducing membrane resistance and increasing power density

Active Publication Date: 2016-06-22
BEIHANG UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] However, the conductivity of alkaline ion exchange membranes currently commercialized or under research and development is still relatively low

Method used

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  • Bipolar membrane for fuel cell and preparation method of bipolar membrane
  • Bipolar membrane for fuel cell and preparation method of bipolar membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] Preparation of Nafion / QAPSF bipolar membrane

[0020] Dissolving polyethersulfone (QAPSF) basic polymers with quaternary ammonium salt groups in the side chains in an analytically pure DMF solution to obtain a transparent and uniform polymer solution with a mass percentage of QAPSF of 2%;

[0021] Take 300ul of the above polymer solution and drop it on a 3cm×3cm aluminum foil (thickness 10μm), fully dry at 65°C, and evaporate the solvent (10-30 minutes), to obtain a homogeneous transparent QAPSF film attached to the aluminum foil, with a thickness of 10μm ;

[0022] Soak the aluminum foil and the QAPSF film attached to the aluminum foil in 1M NaOH solution, separate the QAPSF film from the aluminum foil and remove the aluminum foil, take out the film and wash it with ultrapure water to obtain a homogeneous and transparent QAPSF film;

[0023] Spread the above-mentioned homogeneous and transparent QAPSF film on the PTFE membrane, use a pipette gun to take 10ul 5% Nafion...

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Abstract

The invention discloses a bipolar membrane for a fuel cell and a preparation method of the bipolar membrane. The method comprises the following steps of casting an alkaline polymer solution onto an amphoteric metal substrate to form a membrane; separating the metal substrate and an alkaline thin membrane during ion exchange in an alkaline solution; and carrying out hot-pressing formation on an alkaline polymer membrane and an acid polymer membrane by taking the acid polymer solution as a binding agent. By the method, the thickness of the alkaline polymer membrane can be effectively controlled, favorable contact of the alkaline polymer membrane and the acid polymer membrane is achieved, thus, the resistance of the bipolar membrane is reduced, and the power density of the bipolar membrane fuel cell is effectively improved. The method is simple to operate, the prepared bipolar membrane is provided with a complete bipolar membrane interface, and has excellent mechanical property and high ion conductivity at a room temperature, and the performance of the bipolar membrane fuel cell is remarkably improved.

Description

technical field [0001] The invention relates to a bipolar membrane for a fuel cell and a preparation method thereof, belonging to fuel cell technology technical background [0002] Proton exchange membrane fuel cells (PEMFCs) are power generating devices that directly convert the chemical energy in fuel and oxidant into electrical energy through electrochemical reactions. Proton exchange membrane fuel cell has become the fastest-growing and most mature technology among all kinds of fuel cells due to its many advantages such as high power density, high energy conversion efficiency, compact cell structure, fast start-up speed, low environmental pollution, and wide application fields. A type of fuel cell. However, further reducing the cost of PEMFCs and simplifying the water management auxiliary equipment for their operation at room temperature has been the focus of advancing the large-scale commercial application of PEMFCs. In recent years, with the development of alkaline a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1069H01M8/1086
CPCH01M8/1069H01M8/1093H01M2008/1095Y02E60/50
Inventor 卢善富相艳徐鑫彭思侃
Owner BEIHANG UNIV
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