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A solid polymer fuel cell which can stably generate electric power for long, because the cell is enabled to uniformly supply a fuel gas to all anodes by means of extended flow passages which are extended from anode-side flow passages and formed on a anode-side plate on the downstream side of the end

A solid polymer fuel cell which can stably generate electric power for long, because the cell is enabled to uniformly supply a fuel gas to all anodes by means of extended flow passages which are extended from anode-side flow passages and formed on a anode-side plate on the downstream side of the ends of the anodes in the direction of fuel gas flow, a water absorbing means for nearly uniformly performing water absorption, water retention, and drainage on all channels provided at the ends of the extended flow passages, and a selective gas discharging means for discharging a gas more selectively than water on the upstream side of the water absorbing means. In addition, the power generation characteristics and service life of the fuel cell can be improved further, because the cell can maintain a solid polymer film in a moist state as a whole and can efficiently supply the fuel gas to all anodes by a means for distributing the fuel gas to the inlet sections of the anode-side flow passages and a means for distributing water from a water source to the inlet sections of the anode-side flow passages through holes having a prescribed form and leading to the inlet sections of the anode-side flow passages.

대표청구항 ▼

[ What is claimed is:] [1.]1. A polymer electrolyte fuel cell comprising a cell, a first plate, and a second plate, wherein the cell includes a polymer electrolyte membrane, a cathode, and an anode and is sandwiched by: the first plate with anode-side channels formed on a surface of the first plate

[ What is claimed is:] [1.]1. A polymer electrolyte fuel cell comprising a cell, a first plate, and a second plate, wherein the cell includes a polymer electrolyte membrane, a cathode, and an anode and is sandwiched by: the first plate with anode-side channels formed on a surface of the first plate facing the anode; and the second plate with cathode-side channels formed on a surface of the second plate facing the cathode, the polymer electrolyte fuel cell generating electric power when the anode-side channels are supplied with a fuel gas and air and the cathode-side channels are supplied with an oxidant gas, whereinthe first plate includes a downstream part which is an extension of the anode-side channels located across an edge of the anode and downstream of flow of the fuel gas, anda gas-selectively-exhausting means for selectively exhausting gas is formed in a slot which is formed upstream of an end of the downstream part, the slot overlaying the downstream part.