TY - JOUR
T1 - Investigation of Reducing Concentration Overvoltage toward Development of Low Pt-Loading PEFC
AU - Takei, S.
AU - Uda, K.
AU - Nagayama, M.
AU - Sasaki, K.
AU - Hayashi, A.
N1 - Publisher Copyright:
© 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
PY - 2020/1/9
Y1 - 2020/1/9
N2 - Membrane electrode assemblies (MEAs) with various catalyst-loading were made using a standard 46.5%Pt/KB (TEC10E50E) with the aim of developing low Pt-loading PEFCs. Since increase in concentration overvoltage for low catalyst-loading MEAs was observed, the mechanism of such increase in concentration overvoltage was considered, and then reducing concentration overvoltage was tried through two methods, by adding extra carbon and using a more hydrophobic carbon support, graphitized Ketjen black, within the cathode layer (CL). As a result, we have experimentally proven that increase in hydrophobicity of CL can promote water drain and reduce the concentration overvoltage for low catalyst-loading MEAs, and hydrophobicity is an important factor to be controlled within CL in addition to porosity.
AB - Membrane electrode assemblies (MEAs) with various catalyst-loading were made using a standard 46.5%Pt/KB (TEC10E50E) with the aim of developing low Pt-loading PEFCs. Since increase in concentration overvoltage for low catalyst-loading MEAs was observed, the mechanism of such increase in concentration overvoltage was considered, and then reducing concentration overvoltage was tried through two methods, by adding extra carbon and using a more hydrophobic carbon support, graphitized Ketjen black, within the cathode layer (CL). As a result, we have experimentally proven that increase in hydrophobicity of CL can promote water drain and reduce the concentration overvoltage for low catalyst-loading MEAs, and hydrophobicity is an important factor to be controlled within CL in addition to porosity.
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U2 - 10.1149/1945-7111/abac28
DO - 10.1149/1945-7111/abac28
M3 - Article
AN - SCOPUS:85090165322
SN - 0013-4651
VL - 167
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 12
M1 - 124510
ER -
