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Polymer electrolyte membrane, method of preparing the same and fuel cell including the same

A technology of electrolyte membrane and polymer, applied in fuel cells, fuel cell components, solid electrolytes, etc., can solve unsatisfactory problems

Inactive Publication Date: 2007-08-22
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the properties of known polymer electrolyte membranes (such as ionic conductivity, ability to inhibit methanol crossover (crossover), and other properties) are not at a satisfactory level, so improvements are required.

Method used

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  • Polymer electrolyte membrane, method of preparing the same and fuel cell including the same
  • Polymer electrolyte membrane, method of preparing the same and fuel cell including the same
  • Polymer electrolyte membrane, method of preparing the same and fuel cell including the same

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preparation example Construction

[0083] According to the current embodiment of the present invention, the method for preparing a polymer electrolyte membrane may include: providing a composition for preparing a polymer electrolyte membrane, including a copolymer containing a polysilsesquioxane group, an ion-conducting polymer, and a solvent; applying the composition for producing a polymer electrolyte membrane to a substrate; and heating the applied composition for producing a polymer electrolyte membrane.

[0084] The first step is to provide a composition for preparing a polymer electrolyte membrane by mixing a polysilsesquioxane group-containing copolymer, an ion-conducting polymer, and a solvent. The copolymers and ion-conducting polymers containing polysilsesquioxane groups and their amounts have been described in detail above. The composition for producing a polymer electrolyte membrane may further include the above-mentioned solid acid.

[0085] The solvent of the composition for preparing the polymer...

Embodiment 1

[0102] By mixing 3 parts by weight of poly[propylmethacryl-heptaisobutyl-POSS-co-methylmethacrylate] as a copolymer containing polysilsesquioxane groups (available from Aldrich obtained), 10 parts by weight of polyimide as an ion-conductive polymer, and 87 parts by weight of N-methylpyrrolidone as a solvent to prepare a composition for preparing a polymer electrolyte membrane.

[0103] Then, the composition for preparing the polymer electrolyte membrane was coated on the substrate using a spin coating method and preheated at 100° C. for about 10 minutes.

[0104] The product was then heated at about 200° C. for about 1.5 hours to obtain a polymer electrolyte membrane (membrane thickness: about 17 μm).

Embodiment 2

[0106] A polymer electrolyte membrane (membrane thickness: about 67 μm) was prepared in the same manner as in Example 1, except that 10 parts by weight of sulfonated polyether ether ketone (SPEEK) was used instead of the polyimide used as the ion conductive polymer.

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Abstract

A polymer electrolyte membrane including a polysilsesquioxane group-containing copolymer and an ionic conductive polymer is provided. A method of preparing the polymer electrolyte membrane and a fuel cell including the polymer electrolyte membrane is also provided. The polymer electrolyte membrane has improved ion conductivity and an improved ability to suppress methanol crossover, and therefore can be used as an electrolyte membrane for a fuel cell, including a direct methanol fuel cell.

Description

technical field [0001] The present invention relates to a polymer electrolyte membrane, a method for preparing the membrane, and a fuel cell using the membrane, and more particularly, to a polymer electrolyte membrane exhibiting increased ion conductivity and A polymer electrolyte membrane with reduced methanol crossover, a method for preparing the polymer electrolyte membrane, and a fuel cell using the polymer electrolyte membrane. Background technique [0002] Fuel cells can be classified according to the type of electrolyte used therein. Types of fuel cells include polymer electrolyte membrane fuel cells (PEMFCs), phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide fuel cells, and others. The operating temperature of a fuel cell and its constituent materials vary according to the type of electrolyte. [0003] According to the method of supplying fuel to the anode, the fuel cell can be classified into an external reforming type fuel cell in which the fue...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L83/04H01M8/02
CPCH01M8/1011H01M8/1044H01M8/1027H01M8/1081H01M8/1039H01M8/1032C08J2343/04H01M8/1023H01M8/04268H01M8/1037C08J5/2275H01M8/103Y02E60/523H01M2300/0082H01M8/04186Y02E60/522H01M8/1025Y02E60/50Y02P70/50A41D13/087B43K23/008
Inventor 李珍珪马相国郑明燮李在俊金度鈗
Owner SAMSUNG SDI CO LTD
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