Poly(aryl piperidinium) membranes and ionomers for hydroxide exchange membrane fuel cells
Junhua Wang,Yun Zhao,Brian P. Setzler,Santiago Rojas-Carbonell,Chaya Ben Yehuda,Alina Amel,Miles Page,Lan Wang,Keda Hu,Lin Shi,Shimshon Gottesfeld,Bingjun Xu,Yushan Yan +12 more
TLDR
In this article, a high-performance family of poly(aryl piperidinium) membranes was proposed for HEMFCs with high ionic conductivity, chemical stability, mechanical robustness, and selective solubility.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. 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. A key challenge for hydroxide exchange membrane fuel cells is the development of membranes with both high ionic conductivity and mechanical strength. Here the authors report a high-performance family of poly(aryl piperidinium) membranes enabling promising durability and power density.read more
Citations
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Durability challenges of anion exchange membrane fuel cells
TL;DR: In this paper, the current status of AEMFC durability, and performance degradation mechanisms are reported based on the discussion during the US Department of Energy (DOE) Anion Exchange Membrane Workshop at Dallas, Texas, May 2019.
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Highly quaternized polystyrene ionomers for high performance anion exchange membrane water electrolysers
Dongguo Li,Eun Joo Park,Wenlei Zhu,Qiurong Shi,Yang Zhou,Hangyu Tian,Yuehe Lin,Alexey Serov,Barr Zulevi,Ehren Baca,Cy Fujimoto,Hoon T Chung,Yu Seung Kim +12 more
TL;DR: An ammonium-enriched anion exchange ionomer that improves the performance of an AEM electrolyser to levels approaching that of state-of-the-art proton exchange membrane electrolysers is reported in this article.
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Molecular Design of Single-Atom Catalysts for Oxygen Reduction Reaction
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Alkaline-Stable Anion Exchange Membranes: A Review of Synthetic Approaches
TL;DR: In this paper, a trend review of the synthesis of cationic polymers for anion exchange membrane fuel cell (AEMFC) energy conversion devices is presented, along with a description of the typical synthetic methods for the preparation of AAEMs.
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Radiation-grafted anion-exchange membranes: the switch from low- to high-density polyethylene leads to remarkably enhanced fuel cell performance
TL;DR: In this article, a new high-density polyethylene (HDPE)-based radiation-grafted anion exchange membrane (RG-AEM) was proposed, which achieves a surprisingly high peak power density and a low in situ degradation rate.
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