Unlock instant, AI-driven research and patent intelligence for your innovation.

Conductive Ceramic/Cr Composite Modified Polymer Electrolyte Membrane Fuel Cell Metal Bipolar Plate

A technology of metal bipolar plates and conductive ceramics, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of complex processing procedures, high production costs, and unsuitability for mass production, and achieve simple processing techniques, low production costs, and contact The effect of low resistance

Active Publication Date: 2016-04-06
DALIAN JIAOTONG UNIVERSITY
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these surface modification methods have improved the corrosion resistance and electrical conductivity of metal bipolar plates to a certain extent, there are still problems of one kind or another, such as complex processing procedures, high production costs, and not suitable for mass production, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] ⑴Pretreatment: AISI316L stainless steel bipolar plate is used as the substrate, and the surface is pretreated by degreasing, rust removal and grinding.

[0018] (2) Preparation of pure Cr layer: put pure Cr powder with a particle size of 20 μm into the powder feeder, and use CO 2 A pure Cr layer with a thickness of 0.1 mm was prepared on the surface of the AISI316L bipolar plate by means of synchronous powder feeding by a solid-state laser. Among them, the laser surface modification process parameters are: the power of the laser is 500W, the scanning speed is 5mm / s, the spot diameter is 3mm, the powder feeding rate is 20g / min, and the side blowing argon protection is used, and the flow rate is 16L / min.

[0019] (3) prepare conductive ceramic layer: conductive ceramic powder is made of 20wt% graphite, 34wt% Al by weight percentage 2 o 3 and 46wt% SiO 2 Composition, weighed according to this percentage, ball milled in a ball mill to obtain conductive ceramic powder wit...

Embodiment 2

[0021] ⑴ Pretreatment: AISI446 stainless steel bipolar plate is used as the substrate, and the surface is pretreated by degreasing, derusting and grinding.

[0022] (2) Preparation of pure Cr layer: put pure Cr powder with a particle size of 120 μm into the powder feeder, and use CO 2 A pure Cr layer with a thickness of 0.3 mm was prepared on the surface of the AISI446 bipolar plate by means of synchronous powder feeding by a solid-state laser. Among them, the laser surface modification process parameters are: the power of the laser is 800W, the scanning speed is 4mm / s, the spot diameter is 3mm, the powder feeding rate is 15g / min, and the side blowing argon gas is protected, and the flow rate is 16L / min.

[0023] (3) prepare conductive ceramic layer: conductive ceramic powder is made of 25wt% graphite, 38wt% Al by weight percentage 2 o 3 and 37wt% SiO 2 Composition, weighed according to this percentage, ball milled in a ball mill to obtain conductive ceramic powder with a p...

Embodiment 3

[0025] ⑴ Pretreatment: AISI1020 low carbon steel bipolar plate is used as the substrate, and the surface is pretreated by degreasing, derusting and grinding.

[0026] (2) Preparation of pure Cr layer: put pure Cr powder with a particle size of 40 μm into the powder feeder, and use CO 2 A pure Cr layer with a thickness of 0.5 mm was prepared on the surface of an AISI446 bipolar plate by means of synchronous powder feeding by a solid-state laser. Among them, the laser surface modification process parameters are: the power of the laser is 1000W, the scanning speed is 3mm / s, the spot diameter is 3mm, the powder feeding rate is 18g / min, and the side blowing argon gas is protected, and the flow rate is 16L / min.

[0027] (3) prepare conductive ceramic layer: conductive ceramic powder is made of 18wt% graphite, 32wt% Al by weight percentage 2 o 3 and 50wt% SiO 2 Composition, weighed according to this percentage, ball milled in a ball mill to obtain conductive ceramic powder with a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a conductive ceramic / Cr compound modified metal bipolar plate of a polymer electrolyte membrane fuel cell. An iron-base alloy is taken as a base body, and a pure Cr layer and an Al2O3-SiO2-graphite series conductive ceramic layer are sequentially prepared on the surface of the iron-base alloy for modification with a laser surface modification technique. The modified bipolar plate is free of flaws such as pores, cracks and the like in surface and has good corrosion resistance, conductivity and heat-conducting property, and the service life of the polymer electrolyte membrane fuel cell can be prolonged substantially, and the energy conversion efficiency of the polymer electrolyte membrane fuel cell can be improved substantially. A preparation method has the advantages of simple processing technology, low production cost, capability of realizing mass production and the like.

Description

technical field [0001] The invention relates to a modified polymer electrolyte membrane fuel cell bipolar plate and a preparation method thereof. A conductive ceramic / Cr modified layer is prepared on the surface of the bipolar plate and belongs to the field of fuel cells. Background technique [0002] Polymer electrolyte membrane fuel cells have the advantages of no pollution, high production capacity, low operating temperature, fast start-up speed, and long service life, especially without the use of corrosive electrolytes, and the battery can run at any angle and in any direction, suitable for automobiles and other mobile facilities. Especially in the current situation of increasingly serious environmental pollution and energy shortage, the use of polymer electrolyte membrane fuel cells to replace traditional energy systems can fully meet the needs of zero emissions and low noise. Therefore, the development of polymer electrolyte membrane fuel cells is of great significan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8647H01M4/88H01M4/8803H01M2004/8694Y02E60/50
Inventor 范佳臻田如锦
Owner DALIAN JIAOTONG UNIVERSITY