12/5/2010FCマイクロ班

M1 門脇 主将

Mass transfer phenomenain the vicinity of MPL

Structure and Characteristics of PEFC

H2O+Unreacted O2

H+

H+

H+O2H2

H2

O2Unreacted H2

e-

Anode Cathode

•Chemical Energy Power Generation High efficiency•Gain Heat and Electricity Suit for Cogeneration system•Low Operation Temperature Short start-up time•High Power Density Reduction size and weight

Detail Structure of PEFC

Endplate MPLSeparator MEA GDL EC

O2

H2

Water Management in a Cell

Flooding： Gas diffusion is inhibited by condensate water, reduced output

High-loadOperation

Condensate WaterGas Diffusion

GC

MEA

GDL

Separator

MPL

Water treatment of PEFC is important

Prevent floodingGas Diffusion

MEA

GDL

MPL：Porous made from Carbon

MPL

High-loadOperation

Experimental Date

0

0.2

0.4

0.6

0.8

1

1.2

0 500 1000 1500

Voltag

e (

V)

Time (s)

Experimenter Nanba (No.3)Operation at 30℃Cell temperature 30℃Current density 0.5A/cm2

With MPL

Without MPL

Investigate the mass transfer phenomenon in the vicinity of MPL!!Contribute to the structure of the superior cell system

MPL has been focused in the research of PEFC.But mass transfer mechanisms in MPL is not well understood.

Mass transfer phenomenain the vicinity of MPL

Purpose

Background

SEM Observation (Plan)

Plan

• Continue reading paper• Consider concrete experimental plan• Get used to using Cryo-SEM• Assist Itchy