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- Even in the Field of Fuel Cell -

What is Fuel Cell?
The hydrogen reactions with oxygen result in water and heat.
2H2 + O2 2H2O + heat
A fuel cell is a device that abstracts this chemical energy converting into electrical energy.
Diagrammatical view
At the negative electrode (anode) of an polymer electrolyte fuel cell (PEFC), the oxidation of fuel H2 yields and an electron(e-).
H2 2H+ + 2e-
At the positive electrode (cathode), the reduction of O2 with the electron passed the external load results H2O.
1/2O2 + 2H+ + 2e- H2O
Fuel cell has been put to practical application for cars, private use generators, or notebook PCs, as a clean power source of good energy efficiency.
What is screen-printing used for?

In polymer electrolyte fuel cell, the screen-printing is noticed as an excellent technique to past the catalysts onto the positive and negative electrodes.
In solid oxide fuel cell, the positive and negative electrodes are fixed at the both sides of the solid electrolyte.These electrodes work as electron conductor and reaction catalyst.

And these electrodes have to be porous and thin, on the solid electrolyte.
There is no technology better than screen-printing to apply the electrodes thin and evenly on the surface of the electrolyte.

The developments of pastes of positive and negative electrodes for screen printing are highly expected.
A catalyst is printed out by a solid electrolyte
Solid electrolyte itself is a fragile sheet substance 
that has a thickness of less than 1mm.
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