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Title: Poly(aryl piperidinium) membranes and ionomers for hydroxide exchange membrane fuel cells

Abstract

One promising approach to reduce the cost of fuel cell systems is to develop hydroxide exchange membrane fuel cells (HEMFCs), which open up the possibility of platinum-group-metal-free catalysts and low-cost bipolar plates. However, scalable alkaline polyelectrolytes (hydroxide exchange membranes and hydroxide exchange ionomers), a key component of HEMFCs, with desired properties are currently unavailable, which presents a major barrier to the development of HEMFCs. Here we show hydroxide exchange membranes and hydroxide exchange ionomers based on poly(aryl piperidinium) (PAP) that simultaneously possess adequate ionic conductivity, chemical stability, mechanical robustness, gas separation and selective solubility. Here, these properties originate from the combination of the piperidinium cation and the rigid ether-bond-free aryl backbone. A low-Pt membrane electrode assembly with a Ag-based cathode using PAP materials showed an excellent peak power density of 920 mW cm-2 and operated stably at a constant current density of 500 mA cm-2 for 300 h with H2/CO2-free air at 95 °C.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [2];  [2];  [2];  [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of Delaware, Newark, DE (United States)
  2. Elbit Systems Ltd, Caesarea (Israel)
Publication Date:
Research Org.:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1545542
Grant/Contract Number:  
AR0000771
Resource Type:
Accepted Manuscript
Journal Name:
Nature Energy
Additional Journal Information:
Journal Volume: 4; Journal Issue: 5; Journal ID: ISSN 2058-7546
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Wang, Junhua, Zhao, Yun, Setzler, Brian P., Rojas-Carbonell, Santiago, Ben Yehuda, Chaya, Amel, Alina, Page, Miles, Wang, Lan, Hu, Keda, Shi, Lin, Gottesfeld, Shimshon, Xu, Bingjun, and Yan, Yushan. Poly(aryl piperidinium) membranes and ionomers for hydroxide exchange membrane fuel cells. United States: N. p., 2019. Web. doi:10.1038/s41560-019-0372-8.
Wang, Junhua, Zhao, Yun, Setzler, Brian P., Rojas-Carbonell, Santiago, Ben Yehuda, Chaya, Amel, Alina, Page, Miles, Wang, Lan, Hu, Keda, Shi, Lin, Gottesfeld, Shimshon, Xu, Bingjun, & Yan, Yushan. Poly(aryl piperidinium) membranes and ionomers for hydroxide exchange membrane fuel cells. United States. doi:10.1038/s41560-019-0372-8.
Wang, Junhua, Zhao, Yun, Setzler, Brian P., Rojas-Carbonell, Santiago, Ben Yehuda, Chaya, Amel, Alina, Page, Miles, Wang, Lan, Hu, Keda, Shi, Lin, Gottesfeld, Shimshon, Xu, Bingjun, and Yan, Yushan. Mon . "Poly(aryl piperidinium) membranes and ionomers for hydroxide exchange membrane fuel cells". United States. doi:10.1038/s41560-019-0372-8. https://www.osti.gov/servlets/purl/1545542.
@article{osti_1545542,
title = {Poly(aryl piperidinium) membranes and ionomers for hydroxide exchange membrane fuel cells},
author = {Wang, Junhua and Zhao, Yun and Setzler, Brian P. and Rojas-Carbonell, Santiago and Ben Yehuda, Chaya and Amel, Alina and Page, Miles and Wang, Lan and Hu, Keda and Shi, Lin and Gottesfeld, Shimshon and Xu, Bingjun and Yan, Yushan},
abstractNote = {One promising approach to reduce the cost of fuel cell systems is to develop hydroxide exchange membrane fuel cells (HEMFCs), which open up the possibility of platinum-group-metal-free catalysts and low-cost bipolar plates. However, scalable alkaline polyelectrolytes (hydroxide exchange membranes and hydroxide exchange ionomers), a key component of HEMFCs, with desired properties are currently unavailable, which presents a major barrier to the development of HEMFCs. Here we show hydroxide exchange membranes and hydroxide exchange ionomers based on poly(aryl piperidinium) (PAP) that simultaneously possess adequate ionic conductivity, chemical stability, mechanical robustness, gas separation and selective solubility. Here, these properties originate from the combination of the piperidinium cation and the rigid ether-bond-free aryl backbone. A low-Pt membrane electrode assembly with a Ag-based cathode using PAP materials showed an excellent peak power density of 920 mW cm-2 and operated stably at a constant current density of 500 mA cm-2 for 300 h with H2/CO2-free air at 95 °C.},
doi = {10.1038/s41560-019-0372-8},
journal = {Nature Energy},
number = 5,
volume = 4,
place = {United States},
year = {2019},
month = {4}
}

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