Hydrogen generating cell with cathode

A system comprising:

• a galvanic electrochemical hydrogen gas generating cell having at least one aperture in cathode subassembly can for releasing gas;
• and
• a membrane associated with the at least one aperture, the membrane being hydrogen permeable and substantially impermeable to O2, CO2 and water, to, in turn, preclude the passage of O2, CO2 and water into and out of the cell, and to facilitate the permeation of hydrogen through the at least one aperture of the can.

A storage stable and efficient hydrogen generating cell comprising:

• a commercially available Zn-air cell or hydrogen generating cell comprising a porous cathode;
• and
• a membrane structure associated with an aperture of the cell, wherein the membrane structure is hydrogen permeable and substantially impermeable to O2, CO2 and water, to, in turn preclude the passage of O2, CO2 and water into and out of the cell, and to facilitate the permeation of hydrogen through the aperture.