| 摘要 |
PURPOSE: A separator of fuel cell is provided to prevent flooding by having a structure optimized to exhaust water, to prevent strength degradation due to forming flow channels, thereby imparting stable performance and durability of a stack. CONSTITUTION: A separator(100) of fuel cell supporting a membrane electrode assembly comprises: main flow channels(110), formed from an water inlet part to a water outlet part on the surface of the separator, composing barriers(120); and sub flow channels(130) for preventing flooding by easily exhausting water formed by redox reaction on one side of the barriers. The sub flow channels are parallelly formed along the side of the barrier. The cross section of the sub flow channel has the shape of a polygon or a curved surface. The width of the sub flow channel is 1/4 or wider, and 1/2 or narrower than the depth of the main flow channel. |
