Expanded graphite/polyimide-polyether sulfone composite bipolar plate and preparation method thereof

A technology of polyimide and expanded graphite, which is applied in the field of fuel cell preparation, can solve problems such as low bending strength and electrical conductivity, high hydrogen gas transmission rate, and poor comprehensive performance, so as to improve mechanical properties, ease thermal shock, The effect of high mechanical properties

Pending Publication Date: 2022-07-15
广东氢发新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, composite bipolar plates have poor overall performance (lower bending strength and electrical conductivity), are brittle, and have high hydrogen permeability. The first purpose of the present invention is to provide a bipolar plate with The expanded graphite / polyimide-polyethersulfone composite bipolar plate with high flexural strength and high electrical conductivity can overcome the defects of brittle fracture and high hydrogen gas transmission rate in the existing traditional composite graphite bipolar plate

Method used

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  • Expanded graphite/polyimide-polyether sulfone composite bipolar plate and preparation method thereof
  • Expanded graphite/polyimide-polyether sulfone composite bipolar plate and preparation method thereof
  • Expanded graphite/polyimide-polyether sulfone composite bipolar plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of polyimide-polyethersulfone mixed solution

[0047] Weigh a certain mass of polyimide and polyether sulfone and pour it into DMF organic solvent to dissolve. The mass ratio of the total mass of polyimide and polyether sulfone to solvent DMF is 1:10. Polyimide resin and polyether The mass ratio of sulfone resin is 1:1.25, and the mass fraction of polyimide and polyethersulfone resin in the mixture (polyimide, polyethersulfone and expanded graphite) is 40%.

[0048] (2) Configure expanded graphite / polyimide-polyethersulfone mixture

[0049] The expanded graphite is added to the polyimide-polyethersulfone mixed solution, the polyimide-polyethersulfone mixed resin accounts for 40% of the mixed material (solid content), and the expanded graphite accounts for the mixed material (solid content) The quality score of 60%. The two components are mixed according to a certain mass ratio according to the preset plan, and the mixed slurry is ultrasonically treated...

Embodiment 2

[0055] (1) Preparation of polyimide-polyethersulfone mixed solution

[0056] Weigh a certain mass of polyimide and polyethersulfone and pour it into DMF organic solvent to dissolve, the mass ratio of polyimide and polyethersulfone to solvent DMF is 1:10, polyimide resin and polyethersulfone resin The mass ratio of polyimide and polyethersulfone resin is 1:2, and the total mass of polyimide and polyethersulfone resin accounts for 40% of the mass fraction of the mixture (polyimide, polyethersulfone and expanded graphite).

[0057] (2) Configure expanded graphite / polyimide-polyethersulfone mixture

[0058] The expanded graphite is added to the polyimide-polyethersulfone mixed solution, the polyimide-polyethersulfone mixed resin accounts for 40% of the mixed material (solid content), and the expanded graphite accounts for the mixed material (solid content) The quality score of 60%. According to the preset plan, the two components are mixed according to a certain mass ratio, and ...

Embodiment 3

[0064] (1) Preparation of polyimide-polyethersulfone mixed solution

[0065] Weigh a certain mass of polyimide and polyethersulfone and pour it into DMF organic solvent to dissolve, the mass ratio of polyimide and polyethersulfone to solvent DMF is 1:10, polyimide resin and polyethersulfone resin The mass ratio of polyimide and polyethersulfone resin accounts for 40% of the mass fraction of the mixed material (polyimide, polyethersulfone and expanded graphite).

[0066] (2) Configure expanded graphite / polyimide-polyethersulfone mixture

[0067]The expanded graphite is added to the polyimide-polyethersulfone mixed solution, the polyimide-polyethersulfone mixed resin accounts for 40% of the mixed material (solid content), and the expanded graphite accounts for the mixed material (solid content) The quality score of 60%. According to the preset plan, the two components are mixed according to a certain mass ratio, and the mixed slurry is ultrasonically treated for 15 minutes to ...

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Abstract

The invention discloses an expanded graphite/polyimide-polyether sulfone composite bipolar plate and a preparation method thereof. Polyimide, polyether sulfone and expanded graphite are mixed through a wet method, and a mixed material is obtained; the mixed material is sequentially subjected to drying, mold pressing and curing, the expanded graphite/polyimide-polyethersulfone composite bipolar plate with high bending strength and high conductivity is obtained, and the defects that an existing traditional composite graphite bipolar plate is prone to brittle failure, high in hydrogen permeability and the like can be overcome.

Description

technical field [0001] The invention relates to a composite bipolar plate, in particular to an expanded graphite / polyimide-polyethersulfone composite bipolar plate and a preparation method thereof, belonging to the technical field of fuel cell preparation. Background technique [0002] Hydrogen energy is a new type of clean energy, and proton exchange membrane fuel cell (PEMFC) is a chemical device that converts hydrogen energy into electrical energy, which has great application potential. PEMFC uses hydrogen and oxygen as fuel to generate non-polluting water, does not produce carbon dioxide and other waste gas, is environmentally friendly, and meets future energy requirements, so it is one of the most potential future batteries; although fuel cells have excellent research prospects; However, the high cost of catalysts, the high cost of bipolar plates and the tightness of fuel cells still restrict the application and development of fuel cells. The bipolar plate (BP) is a ke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0213H01M8/0221H01M8/0226B29D7/00
CPCH01M8/0213H01M8/0221H01M8/0226B29D7/00
Inventor 梁伊丽曾浩东江泽峰
Owner 广东氢发新材料科技有限公司
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