Patent ID: 7766032

Claim:
A fuel container for a fuel cell, comprising: a container body, which is provided with a liquid fuel chamber for storage of liquid fuel, the liquid fuel being a methanol aqueous solution or an ethanol aqueous solution, and a compressed gas chamber for accommodating an oxygen-free compressed gas, at least a major portion of the compressed gas chamber being arranged side-by-side with the liquid fuel chamber; a valve disposed in the container body to discharge or shut off the liquid fuel and having a portion configured to be connected with a fuel cell; and a partition wall member disposed slidably in the interior of the liquid fuel chamber, wherein the partition wall member partitions the interior of the container body into the liquid fuel chamber and the compressed gas chamber such that the compressed gas in the compressed gas chamber imparts a back pressure on the liquid fuel in the liquid fuel chamber via the partition wall member, and at least one of sliding surfaces of the liquid fuel chamber and the partition wall member is made of a material of a low frictional coefficient selected from the group consisting of polytetrafluoroethylene and diamond-like carbon not dissolving out into the liquid fuel, the sliding surface of the liquid fuel chamber and the partition wall member being free from lubricating oil.