Alkaline polymer electrolyte fuel cells stably working at 80 °C

Peng, Hanqing; Li, Qihao; Hu, Meixue; Xiao, Li; Lu, Juntao

doi:10.1016/j.jpowsour.2018.04.047

Cited by 280 publications

(226 citation statements)

References 28 publications

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“…Fuel cells are clean energy conversion devices, which produce electricity at potentially more than 50% efficiency through direct electrochemical oxidation of energy‐dense fuels . Among the different types of fuel cells, anion exchange membrane fuel cells (AEMFCs) have garnered a great deal of research interest in the past decade due to their potential to employ non‐noble metals catalysts and their use of low‐cost anion exchange membranes (AEMs), resulting in a significant overall reduction in fuel cell cost . To achieve the goal of robust AEMFC devices that compete with incumbent acidic fuel cell technology, developing AEMs with sufficient ionic conductivity and durability under operating conditions is essential.…”

Section: Introductionmentioning

confidence: 99%

High Performance Anion Exchange Membrane Fuel Cells Enabled by Fluoropoly(olefin) Membranes

Zhu

Peng

Shang

et al. 2019

Adv Funct Materials

137

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Although the peak power density of anion exchange membrane fuel cells (AEMFCs) has been raised from ≈0.1 to ≈1.4 W cm −2 over the last decade, a majority of AEMFCs reported in the literature have not been demonstrated to achieve consistently high performance and steady-state operation. Poly(olefin)-based AEMs with fluorine substitution on the aromatic comonomer show considerably higher dimensional stability compared to samples that do not contain fluorine. More importantly, fluorinated poly(olefin)-based AEMs exhibit high hydroxide conductivity without excessive hydration due to a new proposed mechanism where the fluorinated dipolar monomer facilitates increased hydroxide dissociation and transport. Using this new generation of AEMs, a stable, high-performance AEMFC is operated for 120 h. When the fuel cell configuration is subjected to a constant current density of 600 mA cm −2 under H 2 /O 2 flow, the cell voltage declines only 11% (from 0.75 to 0.67 V) for the first 20 h during break-in and the cell voltage loss is low (0.2 mV h −1 ) over the subsequent 100 h of cell testing. The ease of synthesis, potential for low-cost commercialization, and remarkable ex situ properties and in situ performance of fluoropoly(olefin)-based AEM renders this material a benchmark membrane for practical AEMFC applications.

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Section: Introductionmentioning

confidence: 99%

High Performance Anion Exchange Membrane Fuel Cells Enabled by Fluoropoly(olefin) Membranes

Zhu

Peng

Shang

et al. 2019

Adv Funct Materials

137

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“…[13][14][15][16][17][18][19][20] Sommer et al 13 numerically optimized the structures of AEMFC, aiming at achieving maximum net power. [13][14][15][16][17][18][19][20] Sommer et al 13 numerically optimized the structures of AEMFC, aiming at achieving maximum net power.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16][17][18][19][20] Sommer et al 13 numerically optimized the structures of AEMFC, aiming at achieving maximum net power. [18][19][20] Piana et al 21 found that the bad durability of AEMFC was mainly caused by the CL. The effects of gas diffusion electrode structure parameters on the AEMFC performance were studied by Yang et al 15 With Pt loading of 1.0 mg cm −2 and 20-wt% polytetrafluoroethylene (PTFE), the power density of 213 mW cm −2 (50°C) was achieved.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, more and more studies on the performance and durability of AEMFCs with different cell designs and operating conditions have been conducted. [13][14][15][16][17][18][19][20] Sommer et al 13 numerically optimized the structures of AEMFC, aiming at achieving maximum net power. Omasta et al 14 pointed out that water management was a critical parameter, restricting the AEMFC performance, and electrode optimization such as carbon ratio had huge research potential.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, other experiments using newly designed catalysts or ionomers were also conducted. [18][19][20] Piana et al 21 found that the bad durability of AEMFC was mainly caused by the CL. The brittle CL could be easily separated from the membrane surface due to physical weathering of the electrode during operation.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation on the performance and durability of hydrogen AEMFC with electrochemical impedance spectroscopy

Xie

Zhou

et al. 2019

Int J Energy Res

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Summary In situ experimental tests and scanning electron microscope (SEM) observations are done to explore the impact of geometry structure and operating conditions on the performance and durability of alkaline electrolyte membrane fuel cell (AEMFC) accompanied by electrochemical diagnosis. The results show that low anode and cathode polarization resistances can be achieved by selecting a proper ionomer mass fraction (IMF) of the catalyst layer (CL). Increasing the IMF can improve the tolerance to inlet gas humidity. The presence of the anode microporous layer (MPL) greatly improves the cell performance, but cathode MPL plays a reverse effect. After the durability test, the homogeneity of CL is seriously deformed, leading to a great increment of anode and cathode polarization resistances, verified by the electrochemical impedance spectroscopy (EIS) and SEM results. An enhancement of fuel cell durability is achieved by adding nanoscale polytetrafluoroethylene (PTFE) into CL. This work can provide some guidance for the structural and operating parameter optimization of the AEMFC researches in the future.

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Alkaline Oxygen Electrocatalysis for Fuel Cells and Metal–Air Batteries

Shah

Najam

Brouzgou

et al. 2021

Encyclopedia of Electrochemistry

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Currently, low‐carbon economy is getting importance and electrochemical energy conversion and storage technologies can play an important role in this development. Fuel cells and metal–air batteries are considered as emerging and potential alternate to conventional combustion engines. However, there are real problems that need to be faced, such as the cost, activity, and stability of electrode materials/electrocatalysts for energy conversion and storage. Recent progress in the materials design and synthesis showed that carbon‐based materials such as metal‐coordinated N‐doped carbons have better performance for oxygen electrocatalysis (OER, ORR) in both fuel cells and batteries. The active sites, an important feature of these catalysts, can be tuned by changing metallic centers, heteroatom‐doping (electronic structure, chemical composition), and porosity of materials derived from several precursors. By combining experimental results and theoretical calculations, facts revealed that the dispersion and chemical environment (elements coordinated with metal atom) in the active sites are significantly affected by the presynthesis and pyrolysis conditions. Therefore, MOF‐based precursors are considered as important due to their porosity and surface area.

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Alkaline polymer electrolyte fuel cells stably working at 80 °C

Cited by 280 publications

References 28 publications

High Performance Anion Exchange Membrane Fuel Cells Enabled by Fluoropoly(olefin) Membranes

High Performance Anion Exchange Membrane Fuel Cells Enabled by Fluoropoly(olefin) Membranes

Experimental investigation on the performance and durability of hydrogen AEMFC with electrochemical impedance spectroscopy

Alkaline Oxygen Electrocatalysis for Fuel Cells and Metal–Air Batteries

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Alkaline polymer electrolyte fuel cells stably working at 80 °C

Cited by 280 publications

References 28 publications

High Performance Anion Exchange Membrane Fuel Cells Enabled by Fluoropoly(olefin) Membranes

High Performance Anion Exchange Membrane Fuel Cells Enabled by Fluoropoly(olefin) Membranes

Experimental investigation on the performance and durability of hydrogen AEMFC with electrochemical impedance spectroscopy

Alkaline Oxygen Electrocatalysis for Fuel Cells and Metal–Air Batteries

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Product

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Alkaline polymer electrolyte fuel cells stably working at 80 °C