Abstract
The high power density, lower cost and improved durability are the most important issues for fuel cell stack . New fuel cell stack achieves double the power denstiy of the previous stack as a result of improving the proton conductivity of the electrolyte membrane and applying metallic bipolar plates. Both lower cost and higher durability have also been achieved by halving the amount of catalyst used and controling catalyst degradation reaction. This paper gives an overview of the new stack and its technical features.