Membrane electrode assembly and fuel cell including membrane electrode assembly

Abstract

The present application discloses a membrane electrode assembly and a fuel cell including the membrane electrode assembly. A membrane electrode assembly includes: a polymer electrolyte membrane; a first electrode layer disposed on an upper surface of the polymer electrolyte membrane; and a second electrode layer disposed on a lower surface of the polymer electrolyte membrane. At least one end of the polymer electrolyte membrane bends upward along the side of the first electrode layer and extends to the upper surface of the first electrode layer or bends downward along the side of the second electrode layer and extends to the lower surface of the second electrode layer.

Description

technical field [0001] The present disclosure relates to a membrane electrode assembly and a fuel cell including the same, and, more particularly, to a membrane electrode assembly having self-wetting capability and a fuel cell including the same to overcome the limitation of low humidity , thereby achieving sufficient wettability therein and preventing moisture from diffusing to the outside through the electrolyte membrane. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is a fuel cell incorporating a polymer membrane with proton exchange function as an electrolyte. Compared with other fuel cells, PEMFC can operate at low temperature, has high efficiency and high current and power density, and has a fast reaction time to load changes while starting up immediately. Therefore, PEMFCs have recently been used as fuel cells for hydrogen-powered vehicles. [0003] PEMFC battery packs typically consist of hundreds of unit cells. Each unit cell is a pow...

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Problems solved by technology

[0009] Therefore, there is a problem that lack of proper humidity at an operating temperature with relatively low humidity can lead to dryness of the MEA and deterioration of the performance of the fuel cell

Specifically, severe long-term drying in battery packs can cause irreversible damage to the MEA

[0010] In addition, since the conventional MEA has a structure in which the side end of the polymer electrolyte membrane disposed between the positive electrode and the negative electrode is exposed to the outside, water molecules diffuse from the side of the polymer electrolyte membrane to the outside, thereby corroding the outside of the battery pack and making the batteries Deterioration of insulation safety

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