TY - JOUR
T1 - Alkaline Stability of Anion-Conductive Ionomer Coated on a Carbon Surface
AU - Han, Ziyi
AU - Motoishi, Yuki
AU - Fujigaya, Tsuyohiko
N1 - Funding Information:
This study was supported in part by the Nanotechnology Platform Project from the Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT), and KAKENHI (Nos. JP16K14084 and JP16H06056), the JSPS Bilateral Open Partnership Joint Research Projects (AJ180096) from the Japan Society for the Promotion of Science (JSPS), and TEPCO Memorial Foundation. We thank Natasha Lundin, Ph.D., from Edanz Group ( www.edanzediting.com/ac ) for editing a draft of this manuscript.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/10/22
Y1 - 2019/10/22
N2 - Anion-exchange membrane fuel cells (AEMFCs) are promising technologies that allow the use of nonprecious metals as catalysts because the oxidation reduction reaction at the cathode occurs readily at the high pH of AEMFCs. However, the insufficient chemical stability of the anion-conductive materials in AEMFCs currently limits their development. We studied the chemical stability of the electrolyte in the catalyst layer of AEMFCs containing cationic dimethyl polybenzimidazole (mPBI). Although degradation was observed in an mPBI membrane under alkaline conditions, mPBI coated on a carbon support showed excellent alkaline stability. Because no glass transition temperature was observed for mPBI after coating on the support, the increase of chemical stability was probably associated with the decrease of polymer flexibility.
AB - Anion-exchange membrane fuel cells (AEMFCs) are promising technologies that allow the use of nonprecious metals as catalysts because the oxidation reduction reaction at the cathode occurs readily at the high pH of AEMFCs. However, the insufficient chemical stability of the anion-conductive materials in AEMFCs currently limits their development. We studied the chemical stability of the electrolyte in the catalyst layer of AEMFCs containing cationic dimethyl polybenzimidazole (mPBI). Although degradation was observed in an mPBI membrane under alkaline conditions, mPBI coated on a carbon support showed excellent alkaline stability. Because no glass transition temperature was observed for mPBI after coating on the support, the increase of chemical stability was probably associated with the decrease of polymer flexibility.
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U2 - 10.1021/acsomega.9b01466
DO - 10.1021/acsomega.9b01466
M3 - Article
AN - SCOPUS:85074215762
SN - 2470-1343
VL - 4
SP - 17134
EP - 17139
JO - ACS Omega
JF - ACS Omega
IS - 17
ER -