An electrochemical element is provided. The electrochemical element may comprise an anode, a cathode on the anode, and an anion exchange membrane disposed between the cathode and the anode and including cellulose and chitosan.

Provided is a gas diffusion layer for a fuel cell, wherein a reactive gas passage groove for distributing a reactive gas is formed in one principal surface of the gas diffusion layer, and a reinforcing member is provided along the reactive gas passage groo...

A polymer electrolyte membrane (14) for a direct oxidation fuel cell includes a porous polymer supporter (10) having a plurality of pores, and a hydrocarbon fuel diffusion barrier layer (12) which is formed on the polymer supporter and contains an inorgani...

An electrical energy generating device is disclosed which is able to supply oxygen in atmospheric air efficiently to an oxygen electrode and to vaporize water yielded off efficiently, and which is superior in waterproofness. The device includes a plurality...

In order to provide a fuel cell with high discharge property by a production step that involves reduced variation in the coating amount with little occurrence of coating failure, a fuel cell is provided, which comprises: a hydrogen ion-conductive polymer e...

A polymer electrolyte fuel cell comprising a polymer electrolyte made of an ion exchange membrane, catalyst layers disposed on both sides thereof and current collectors disposed on the outer sides thereof, wherein a solvent-soluble fluorine-containing poly...