TY - JOUR
T1 - Analysis of Electric Generation Distribution on a PEFC Electrode (2nd Report, Electric Generation Distribution on a PEFC with Ribs and Flow Channels of 2 mm Width)
AU - Konomi, Toshiaki
AU - Kitahara, Tatsumi
AU - Nakajima, Hironori
AU - Murakami, Hiroki
PY - 2008
Y1 - 2008
N2 - We have separately evaluated the contact resistance, and the charge and mass transfer resistances under the channel and rib of the cathode separator in a polymer electrolyte fuel cell (PEFC) from the change of the overpotentials by removing the gas diffusion layer (GDL) under the channel. As a result, we find the ratios of current under the rib and channel for the case of the rib having the width of 2 mm. In contrast to the case of the rib having the width of 1 mm in our previous paper, the current ratios of them are almost the same when air is supplied into the cathode because the mass transfer resistance under the rib is large in the present case. On the other hand, when pure oxygen is supplied to decrease the mass transfer resistance under the rib, 80-90% of the current is generated under the rib as the case of the rib of 1 mm width. Thus the contribution of the mass transfer resistance to the current that is equivalent to the reaction rate becomes large under the rib as the width of the rib increases. The contact resistance is also found to largely contribute to the reaction rate under the channel.
AB - We have separately evaluated the contact resistance, and the charge and mass transfer resistances under the channel and rib of the cathode separator in a polymer electrolyte fuel cell (PEFC) from the change of the overpotentials by removing the gas diffusion layer (GDL) under the channel. As a result, we find the ratios of current under the rib and channel for the case of the rib having the width of 2 mm. In contrast to the case of the rib having the width of 1 mm in our previous paper, the current ratios of them are almost the same when air is supplied into the cathode because the mass transfer resistance under the rib is large in the present case. On the other hand, when pure oxygen is supplied to decrease the mass transfer resistance under the rib, 80-90% of the current is generated under the rib as the case of the rib of 1 mm width. Thus the contribution of the mass transfer resistance to the current that is equivalent to the reaction rate becomes large under the rib as the width of the rib increases. The contact resistance is also found to largely contribute to the reaction rate under the channel.
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U2 - 10.1299/kikaib.74.678
DO - 10.1299/kikaib.74.678
M3 - Article
AN - SCOPUS:44949130884
VL - 74
SP - 678
EP - 683
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 739
ER -