TY - JOUR
T1 - Durability of an aromatic block copolymer membrane in practical PEFC operation
AU - Okanishi, Takeou
AU - Yoda, Takeshi
AU - Sakiyama, Yoko
AU - Miyahara, Takahiro
AU - Miyatake, Kenji
AU - Uchida, Makoto
AU - Watanabe, Masahiro
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan.
PY - 2012/10
Y1 - 2012/10
N2 - The durability of a novel proton-conducting polymer electrolyte membrane, sulfonated polybenzophenone/poly (arylene ether) (SPK) block copolymer, was evaluated at middle temperature (80 °C), low humidity (53% RH), and a low current density, 0.02 A cm - 2, in a polymer electrolyte fuel cell for 980 h. The electrochemical properties and drain water collected from the anode and cathode were monitored during the test, followed by post-test analyses of the membrane. The nuclear magnetic resonance (NMR) spectra and ion exchange capacity (IEC) value of the post-test membrane showed very minor changes compared to those of the pristine one. The post-test membrane retained 94% of its original weight-averaged molecular weight (M w) org. There was no remarkable change in Q oxide (oxide formation charge of the cathode catalyst) after the test, which indicates that the specific adsorption of decomposition products of the SPK membrane on the cathode catalyst was not significant.
AB - The durability of a novel proton-conducting polymer electrolyte membrane, sulfonated polybenzophenone/poly (arylene ether) (SPK) block copolymer, was evaluated at middle temperature (80 °C), low humidity (53% RH), and a low current density, 0.02 A cm - 2, in a polymer electrolyte fuel cell for 980 h. The electrochemical properties and drain water collected from the anode and cathode were monitored during the test, followed by post-test analyses of the membrane. The nuclear magnetic resonance (NMR) spectra and ion exchange capacity (IEC) value of the post-test membrane showed very minor changes compared to those of the pristine one. The post-test membrane retained 94% of its original weight-averaged molecular weight (M w) org. There was no remarkable change in Q oxide (oxide formation charge of the cathode catalyst) after the test, which indicates that the specific adsorption of decomposition products of the SPK membrane on the cathode catalyst was not significant.
KW - Block copolymer membranes
KW - Durability
KW - Polymer electrolyte fuel cell
KW - Sulfonated aromatic polymer
UR - http://www.scopus.com/inward/record.url?scp=84865548167&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84865548167&partnerID=8YFLogxK
U2 - 10.1016/j.elecom.2012.08.010
DO - 10.1016/j.elecom.2012.08.010
M3 - Article
AN - SCOPUS:84865548167
SN - 1388-2481
VL - 24
SP - 47
EP - 49
JO - Electrochemistry Communications
JF - Electrochemistry Communications
IS - 1
ER -