A gas diffusion electrode assembly comprises gas diffusion electrodes. A bonding piece having on a surface a perfluorosulfonic acid layer, a perfluorosulfonyl fluoride layer or an alky ester of perfluorocarboxylic acid layer is placed at perfluoro compound...

In order to discharge current from a gas diffusion electrode (10) in an electrolytic unit cell including a gas chamber (11), the gas diffusion electrode is electrically connected to the wall surface of the gas chamber having conductivity through an electri...