Crosslinkable aromatic resin having protonic acid group, and ion conductive polymer membrane, binder and fuel cell using the resin

An aromatic and cross-linking technology, applied in solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve problems such as deterioration of battery characteristics, poor power generation efficiency, low heat resistance and chemical durability , to achieve excellent solvent solubility and thermoplasticity, excellent electricity generation efficiency and reliability, and excellent adhesiveness

CN1630676AInactive Publication Date: 2005-06-22MITSUI CHEM INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2005-06-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a proton-acid group-containing cross-linkable aromatic resin having a cross-linking group suitable for use as an electrolyte membrane and a binder used in fuel cells, and a polymer for fuel cells obtained from the resin. Electrolyte membranes and binders, and fuel cells using them. This protonic acid group-containing crosslinkable aromatic resin has a crosslinking group that is not derived from a protonic acid group and can be crosslinked without generating a detachment component, and exhibits excellent ion conductivity, heat resistance, water resistance, Adhesion, and low methanol permeability. As the above-mentioned crosslinking group that is not derived from a protonic acid group and can be crosslinked without generating a detachment component, an alkyl group having 1 to 10 carbon atoms and a carbonyl group directly bonded to an aromatic ring are used as a crosslinking group, or A carbon-carbon double bond or a carbon-carbon triple bond is a better choice as the crosslinking group. Aromatic resins such as aromatic polyethers, aromatic polyamides, aromatic polyimides, aromatic polyamideimides, and aromatic polypyrroles having the above-mentioned crosslinking groups are proton acid group-containing crosslinking aromatic resins. A good choice for family resins.
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Description

technical field

[0001] The present invention relates to an ion-conductive proton-containing acid group-containing cross-linkable aromatic resin used in fuel cells using hydrogen, ethanol, etc. as fuel, a polymer film obtained by using the resin, an adhesive, and The fuel cell. Background technique

[0002] [Polymer Fuel Cell]

[0003] In recent years, due to environmental problems, the demand for new energy storage or power generation elements has become great in society. As one of these elements, the fuel cell has attracted people's attention, and has become the most anticipated power generation element due to its low pollution and high efficiency characteristics. A fuel cell is a battery that oxidizes fuels such as hydrogen and methanol using oxygen or air electrochemical means to convert the chemical energy of the fuel into electrical energy and take it out.

[0004] Such fuel cells are classified into phosphoric acid type, molten carbonate type, solid oxide type, and ...

Examples

specific example 1

[0127] A proton-acid-group-containing cross-linking aromatic resin having an alkyl group having 1 to 10 carbon atoms directly bonded to a carbonyl group and an aromatic ring is used as a cross-linking group, which is an embodiment of the proton-acid-group-containing cross-linking aromatic resin of the present invention. better choice. Examples of such aromatic resins include aromatic polyethers, aromatic polyamides, aromatic polyimides, aromatic polyamideimides, and aromatic polypyrroles. In particular, aromatic polyethers and aromatic polyamides, which have excellent solvent solubility when not cross-linked and are easy to realize processing such as film formation, are preferred, and are not affected by hot water, acid, alkaline water, alcohols, etc. The hydrolysis of aromatic polyethers is particularly suitable. That is, a proton acid group-containing cross-linkable aromatic polyether having an alkyl group having 1 to 10 carbon atoms directly bonded to a carbonyl group and ...

specific example 3

[0229] The cross-linking aromatic resin containing proton acid group with carbon-carbon double bond or carbon-carbon triple bond as the cross-linking group is a better choice for the cross-linking aromatic resin containing proton acid group in the present invention. Examples of such aromatic resins include aromatic polyethers, aromatic polyamides, aromatic polyimides, aromatic polyamideimides, and aromatic polypyrroles. In particular, aromatic polyethers and aromatic polyamides, which have excellent solvent solubility when not crosslinked and are easy to process such as molding, are preferred, and are not affected by hot water, acid, alkaline water, alcohols, etc. Hydrolyzed aromatic polyethers are particularly suitable. That is, a proton acid group-containing cross-linkable aromatic polyether having a carbon-carbon double bond or a carbon-carbon triple bond is particularly suitable.

[0230] In the present invention, cross-linking aromatic resins containing proton acid group...

Embodiment

[0394] The present invention will be further described in detail below according to the examples, but the present invention is not limited by the examples. Various test methods in Examples are as follows.

[0395] (i) Reduced viscosity

[0396] Dissolve 0.50 g of polymer powder in 100 ml of solvent, or dilute the polymer solution to 0.005 g / ml, and measure at 35°C.

[0397] (ii) 5% weight loss temperature, weight loss start temperature

[0398] In air, DTA-TG (TG-DTA2000 manufactured by Mac Science Co., Ltd.) was used for measurement at a temperature increase rate of 10° C. / min.

[0399] (iii) Glass transition temperature

[0400] The temperature was measured up to 400° C. at a heating rate of 10° C. / min using a differential scanning calorimeter (DSC3100 manufactured by Mac Syences Co., Ltd.).

[0401] (iv) Proton exchange

[0402] According to the following method, the metals of uric acid can be restored to free protonic acid.

[0403] (1) The powder, film, or photocros...