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Electrolyte film and solid polymer fuel cell using the same

A solid polymer and electrolyte membrane technology, applied in solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problem of reducing the importance of durability

Inactive Publication Date: 2007-03-14
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are currently no electrolyte membranes that fully satisfy these requirements
[0006] Also, from the viewpoint of portable methanol fuel PEFC, 1) it is important to prevent methanol permeation, and it is important to be able to operate at around room temperature, and on the other hand, the importance of durability at high temperatures is reduced.

Method used

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  • Electrolyte film and solid polymer fuel cell using the same
  • Electrolyte film and solid polymer fuel cell using the same
  • Electrolyte film and solid polymer fuel cell using the same

Examples

Experimental program
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Effect test

Embodiment

[0065] The present invention is further described in detail using the examples of the present invention, but the present invention is not limited to the present examples.

[0066] Base material preparation example 1

[0067] 20 parts by weight of polymer composition (by norbornene ring-opening polymer powder (manufactured by Nippon Zeon Co., Ltd., trade name: ノ-solex NB, weight average molecular weight (hereinafter referred to as Mw): more than 2 million) 12wt % and ultra-high molecular weight polyethylene (Mw: 3,000,000) 88wt% composition) and 80 parts by weight of liquid paraffin are uniformly mixed into a slurry, dissolved and mixed with a small kneader at a temperature of 160 ° C for about 60 minutes. The resulting mixture was sandwiched between rolls or metal plates cooled to 0°C, and quenched into a sheet to obtain a sheet-like resin.

[0068] The sheet-like resin is hot-pressed at a temperature of 115°C until the thickness of the sheet is 0.4-0.6mm, and the vertical an...

Embodiment 2

[0085] Film B-2 was obtained by substituting the AAVS system described below for AA in Example 1.

[0086] AAVS department:

[0087] Prepare a 70wt% aqueous solution with 79mol% of acrylic acid, 20mol% of sodium vinylsulfonate, and 1mol% of divinylbenzene as a cross-linking agent, and add 1mol% to 100mol% of the combined acrylic acid and vinylsulfonic acid The water-soluble azo-based initiator V-50, thus obtaining a solution. Substrate A-1 was immersed in this solution, and after irradiating with visible light for 6 minutes, it heated in the oven of 50 degreeC for 18 hours.

[0088] Afterwards, excess polymer on the surface of the membrane was removed, ion-exchanged with a large excess of 1N hydrochloric acid, thoroughly washed with distilled water, and dried in an oven at 50°C to obtain membrane B-2. Membrane B-2 was also performed in the same manner as in Example 1: 1) measurement of membrane area change rate; 2) evaluation of methanol permeation performance; 3) measuremen...

Embodiment 3

[0090] Using the ATBS system described below in place of AA in Example 1, film B-3 was obtained.

[0091] Department of ATBS:

[0092] Dilute a mixed monomer of 2-acrylamide-2-methylpropanesulfonic acid (hereinafter referred to as "ATBS") 99mol% and crosslinking agent: methylenebisacrylamide 1mol% to 50wt% with water, and prepare an aqueous solution. The total of ATBS and methylenebisacrylamide was 100 mol%, and 1 mol% of water-soluble azo-based initiator V-50 was added to obtain a solution. Substrate A-1 was immersed in this solution, and after irradiating with visible light for 6 minutes, it heated in the oven of 50 degreeC for 18 hours.

[0093] Thereafter, excess polymer on the surface of the membrane was removed, ion-exchanged with a large excess of 1N hydrochloric acid, thoroughly washed with distilled water, and dried in an oven at 50°C to obtain membrane B-3. Membrane B-3 was also performed in the same manner as in Example 1: 1) measurement of membrane area change ra...

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Abstract

An electrolyte membrane having a porous base material having pores filled with a first polymer capable of conducting a proton, wherein the porous base material comprises i) at least one second polymer selected from the group consisting of polyolefins and ii) a third polymer having double bond in the polymer, and contains a crosslinked second polymer wherein molecules of the second polymer are crosslinked with one another; and a fuel cell, particularly a solid polymer fuel cell, more specifically a direct methanol polymer fuel cell, using the electrolyte membrane. The electrolyte membrane is excellent in the inhibition of permeation of methanol, exhibits no or reduced change in its area, and is excellent in proton conductivity.

Description

technical field [0001] The present invention generally relates to a fuel cell, in particular to a direct methanol solid polymer fuel cell. Background technique [0002] With the active development of activities to protect the earth's environment, people strongly call for the prevention of so-called greenhouse gas, NOx emissions. In order to reduce the total emissions of these gases, the practical use of fuel cell systems for automobiles is considered to be a very effective way. [0003] Solid polymer fuel cell (PEFC, Polymer Electrolyte Fuel Cell) has the excellent characteristics of low temperature operation, high output density and only water is produced during power generation reaction. Among them, since PEFC fueled by methanol can be supplied as liquid fuel in the same way as gasoline, it is considered to be a promising power source for electric vehicles. [0004] Solid polymer fuel cells are divided into two categories: one is the conversion type that uses a converter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/10H01B1/06C08J5/22H01B1/12
CPCH01M8/1011H01B1/122H01M8/1016C08J2323/06C08J2485/04Y02E60/523H01M2300/0082C08J5/2275Y02E60/50Y02P70/50
Inventor 山口猛央山本一成中尾真一
Owner NITTO DENKO CORP