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Next-generation Fuel Cell Stack for Honda FCX

Article of Honda R&D Technical Review Vol.17 No.2


The next generation fuel cell stack employs an aromatic electrolyte membrane, which offers outstanding proton conductivity, a stamped metal separator formed with a unitized seal for superb electrical and thermal conductivity, and a simple stack structure which is obtained using the springiness of the stamped metal separators. The combination of these innovative new technologies enables the new fuel cell stack to achieve output density that ranks among the best in the world, to be half the size of its predecessor, and to operate in temperatures from -20 to +95 °C, leading to its enhanced environmental adaptability.
In order to maximize space efficiency in the fuel cell system box, the FCX uses two compact FC stacks. The resulting integrated module structure, with the humidifier unit, enables a more compact fuel cell system box to be achieved. Energy efficiency of the new fuel cell system has also increased over the previous model, due to the enhanced power generation efficiency of the fuel cell stack.


(1) Komura, T.: Honda niokeru Nenryo Denchi Kaihatsu no Genjyo to Saitekika Shuho, Denki Kagaku Semina 1, p. 135-142 (2000) (in Japanese)
(2) Moriya, T.: Honda niokeru Nenryo Denchi Jidosha no Kaihatsu, Denki Kagaku Semina 1, p. 139-144 (2002) (in Japanese)
(3) Takenaka, H.: Genri to Denkyoku Hanno, Nenryo Denchi Gijyutu to Sono Ouyo, Tekunosysutemu, p. 91 (2000) (in Japanese)
(4) Ogawa, T., Kimura, K., Uchibori, K., Fujimoto, S., Shimizu, K.: Development of New Power Train for Honda FCX Fuel Cell Vehicle, Honda R&D Technical Review, Vol. 15, No. 1, p.7-12

Author (organization or company)

Masajiro INOUE(Wako Research Center)、Nobuhiro SAITO(Wako Research Center)、Kenji UCHIBORI(Wako Research Center)

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