Nissan Motor Company has developed a new fuel cell stack with double the power density of its previous-generation stack.. Click image to enlarge
Tokyo, Japan – Nissan Motor Company has developed a new fuel cell stack with double the power density of its previous-generation stack. The new fuel cell stack also achieves a 35 per cent cost reduction, mainly due to halving the use of platinum, a key material in the production of fuel cell stacks.
Test fleets incorporating the improved fuel cell stacks will be operational by the end of this year.
The new stacks combine an improved conductivity of the electrolyte layer within the membrane electrode assembly, where the main chemical reaction occurs; a more densely-packed cell structure, achieved through the replacement of the carbon separator with a new thin metal separator; and higher durability electrode material that results in a 50 per cent reduction of the platinum required compared to the previous generation.
The combined improvements also result in a 75 per cent reduction in the fuel cell stack’s size, allowing for improved packaging flexibility. Compared to the previous-generation stack, the new stack is 68 litres compared to 90 litres, but power output has risen from 90kW to 130kW, which can power larger vehicles.