Thermal Properties of Epoxy Based Expanded Graphite Composite for Bipolar Plate of Polymer Electrolyte Fuel Cells

2010 ◽  
Vol 123-125 ◽  
pp. 1107-1110 ◽  
Author(s):  
Jae Young Lee ◽  
Ji Jung Lee ◽  
Hyung Ryul Rhim ◽  
Joong Pyo Shim ◽  
Hong Ki Lee
Keyword(s):  
Thermal Properties ◽  
Polymer Electrolyte ◽  
Expanded Graphite ◽  
Graphite Powder ◽  
Bipolar Plate ◽  
Polymer Electrolyte Fuel Cell ◽  
Molding Pressure ◽  
Graphite Composite ◽  
Graphite Content ◽  
Electrical Vehicles

The application of polymer electrolyte fuel cell (PEMFC) to the electrical vehicles is restricted by high material cost and complicated manufacturing process. The epoxy based graphite composite has been prepared with various additives. The possibility for bipolar plate material at PEMFC was investigated by electrical and thermal properties. Density of bipolar plate with graphite composite was decreased from 5.40 to 2.57 as 80 w/o of graphite content were changed to 50 w/o of graphite content and 30 w/o of expanded graphite. The percolation thresholds showed around 75 w/o of graphite content was varied by molding pressure. From the TGA analysis, the glass transition temperatures were shown around 250 degrees and less that 3% of weight loss was found at 150 degree. The surface conductivity of epoxy/graphite bipolar plate showed from 4.5 S/cm to 87 S/cm and the highest value of conductivity was obtained using expanded graphite powder only. The improvement of thermal stability and electrical properties was accomplished by addition of expanded graphite powder.

Improvement of Electrical and Thermal Properties of Epoxy Based Graphite Bipolar Plate for PEMFC

2007 ◽  
Vol 26-28 ◽  
pp. 853-856 ◽  
Author(s):  
Hong Ki Lee ◽  
Soo Heun Chae ◽  
Joong Pyo Shim ◽  
Sung Won Yang
Keyword(s):  
Thermal Properties ◽  
Polymer Electrolyte Membrane ◽  
Expanded Graphite ◽  
Graphite Powder ◽  
Bipolar Plate ◽  
Gas Diffusion ◽  
Carbon Paper ◽  
Mechanical And Thermal Properties ◽  
Carbon Cloth ◽  
Graphite Composite

The decrease of material cost for manufacturing fuel cell stack is strongly required for overcoming commercial restriction. The epoxy based graphite bipolar plate (BP) for polymer electrolyte membrane fuel cells (PEMFC) has been prepared and electrical, mechanical and thermal properties were compared. The density of graphite composite bipolar plate showed from 1.67 to 2.54 as graphite content is increased from 60 to 80w/o and decreased as expanded graphite was added. The contact resistance between epoxy/graphite bipolar plate and gas diffusion layer (GDL) had lower value using carbon cloth than carbon paper for GDL. The conformation of thermal stability, improvement of mechanical and electrical properties was accomplished by addition of expanded graphite powder.

Corrosion-resistant characteristics of nitrided Ni-free stainless steel for bipolar plate of polymer electrolyte fuel cell

2017 ◽  
Vol 42 (9) ◽  
pp. 6303-6309 ◽  
Author(s):  
Yang Yu ◽  
Sayoko Shironita ◽  
Takaaki Mizukami ◽  
Kunio Nakatsuyama ◽  
Kenichi Souma ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Bipolar Plate ◽  
Polymer Electrolyte Fuel Cell ◽  
Corrosion Resistant

Fabrication Polyurethane/Expanded Graphite Powder Composite Antistatic Sponge by In Situ Polymerization

2012 ◽  
Vol 479-481 ◽  
pp. 395-398
Author(s):  
Dan Qing Chen
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
In Situ Polymerization ◽  
Expanded Graphite ◽  
Graphite Powder ◽  
Polymeric Matrix ◽  
Powder Composite

This document explains and demonstrates how to prepare Polyurethane(PU)/Expanded Graphite powder(EGp) composite antistatic sponge by in situ polymerization. The morphology、mechanical、electrical and thermal properties of the PU/EGp composite antistatic sponge have been investigated. PU/ EGp composite sponge have better mechanical properties than that of CB composite. The resistivity of PU/EGp composite antistatic sponge can reach at about 108Ω•cm at the content around 5wt% of the EGp. EGp can stably exist in PU sponge and has little influence to the polymeric matrix while being heated.

An ultralight-weight polymer electrolyte fuel cell based on woven carbon fiber-resin reinforced bipolar plate

2021 ◽  
Vol 484 ◽  
pp. 229291
Author(s):  
Hyunguk Choi ◽  
Dong Jun Seo ◽  
Won Young Choi ◽  
Seo Won Choi ◽  
Myeong Hwa Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Carbon Fiber ◽  
Polymer Electrolyte ◽  
Bipolar Plate ◽  
Polymer Electrolyte Fuel Cell
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