Ion exchange capacity controlled biphenol-based sulfonated poly(arylene ether sulfone) for polymer electrolyte membrane water electrolyzers: Comparison of random and multi-block copolymers

Han, Sang‐Ik; Yu, Duk Man; Mo, Yong-Hwan; Ahn, Su Min; Lee, Jang Yong; Kim, Sang Woo; Yoon, Sang Jun; Hong, Sung–Kwon; Hong, Young Taik; So, Soonyong

doi:10.1016/j.memsci.2021.119370

Cited by 52 publications

(51 citation statements)

References 58 publications

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“…PEMECs with a 20 μm thick SPAES membrane showed 1.07 A cm −2 at 1.6 V, which was claimed to be better than that of Nafion-based cells. Another study 19 involved hydrocarbon random and multi-block copolymers, which have the same chemical structures as biphenol-based sulfonated poly(arylene ether sulfone) in the proton form (BPSH). PEMECs with a random BPSH achieved better performance (5.3 A cm −2 ) than that with similarly thick (∼50 μm) Nafion 212 (4.8 A cm −2 ) at 1.9 V, but degradation resulted in a decay of 951 μV h −1 versus 613 μV h −1 for Nafion in their AST testing.…”

Section: Challenges and Opportunitiesmentioning

confidence: 99%

PEM Fuel cell and electrolysis cell technologies and hydrogen infrastructure development – a review

Wang

Pang

et al. 2022

Energy Environ. Sci.

340

105

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Section: Challenges and Opportunitiesmentioning

confidence: 99%

PEM Fuel cell and electrolysis cell technologies and hydrogen infrastructure development – a review

Wang

Pang

et al. 2022

Energy Environ. Sci.

340

105

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“…(a) Relative selectivity of several PEMs to Nafion, Aquivion: short side chain PFSA, BPSH: biphenyl-based sulfonated polysulfones, − sPPS: sulfonated poly(phenylene sulfone) . 0: Nafion, 1: BPSH random (IEC = 1.2 mequiv g –1 ), 2: BPSH random (IEC = 1.9 mequiv g –1 ), 3: BPSH random (IEC = 2.2 mequiv g –1 ), 4: BPSH block (IEC = 1.5 mequiv g –1 ).…”

Section: Performance Of Water Electrolysis Cellmentioning

confidence: 99%

“…Relative selectivity is defined with respect to the selectivity of Nafion117. (b) Phase separated morphology of the PEMs illustrated from the previous data. , Numbers denote the PEMs shown in Figure a.…”

Section: Performance Of Water Electrolysis Cellmentioning

confidence: 99%

Membrane Strategies for Water Electrolysis

Park

Arges

et al. 2022

ACS Energy Lett.

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Hydrogen holds great promise as a clean energy resource to help the global carbon-free energy goal. Green hydrogen production from renewable energy-powered water electrolysis can decarbonize hard-to-abate industries and transport applications. Ion-exchange membranes are an essential component of membrane-based water electrolysis, enabling high hydrogen production efficiency through a zero-gap configuration. While perfluorosulfonic acids are the standard polymer electrolyte membrane material, research efforts for membrane alternatives have increased over the years to drive down the cost of electrolyzers and improve devices' durability without sacrificing performance and efficiency. Here we present our perspectives on acidic, alkaline, and bipolar membranes for water electrolyzers and discuss future research directions to develop advanced membranes for green hydrogen production technology.

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“…The hydrogen gas permeability (P) of the hBN/Nafion composite membrane was analyzed by quantifying the permeated hydrogen concentration across the membrane using gas chromatography (GC, YL6500 GC, Young In, South Korea) equipped with a thermal conductivity detector. 34 The membrane was assembled in a single PEMFC single cell (active area = 7.5 cm 2 ) without catalyst and gas diffusion layers, and the gas permeability test was executed using a fuel cell test station with cell temperature and gas humidity controllers (SFC-TS, Fuel Cell Technologies Inc.). High purity H 2 and Ar gases were set to flow into the anode and cathode sides, respectively, and the gas from the cathode side was provided to the GC.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Monolayer Hexagonal Boron Nitride Nanosheets as Proton-Conductive Gas Barriers for Polymer Electrolyte Membrane Water Electrolysis

Kim

Sihn

Yoon

et al. 2021

ACS Appl. Nano Mater.

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In a proton exchange membrane (PEM) water electrolyzer, the poor gas barrier property of conventional perfluorosulfonic acid (PFSA) membranes results in membrane degradation and safety-related explosion issues. In this report, we investigate the potential of monolayer hexagonal boron nitride (hBN) as an effective hydrogen gas barrier for PEMs in a water electrolyzer. An hBN/Nafion composite membrane is prepared by transferring large-area monolayer hBN (∼25 cm2), which is prepared using chemical vapor deposition, onto Nafion 117. This one-atom-thick monolayer hBN, which is known as an impermeable material to most molecules except protons, significantly enhances the hydrogen barrier property of Nafion 117, even at high temperatures, and increases the mechanical stability of the membrane. Although a trade-off between proton conductivity and hydrogen barrier properties is observed, the water electrolysis efficiency of the cell containing the composite membrane is improved by increasing the operating temperature while minimizing the decrease in proton conductivity. By employing monolayer hBN, hydrogen permeability is significantly reduced by approximately 40%, and the corresponding electrolysis efficiency decreases by 19% compared to that of pristine Nafion. Furthermore, the enhanced gas barrier property of the composite shows slightly higher long-term (100 h) stability than that of Nafion 117.

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Ion exchange capacity controlled biphenol-based sulfonated poly(arylene ether sulfone) for polymer electrolyte membrane water electrolyzers: Comparison of random and multi-block copolymers

Cited by 52 publications

References 58 publications

PEM Fuel cell and electrolysis cell technologies and hydrogen infrastructure development – a review

PEM Fuel cell and electrolysis cell technologies and hydrogen infrastructure development – a review

Membrane Strategies for Water Electrolysis

Monolayer Hexagonal Boron Nitride Nanosheets as Proton-Conductive Gas Barriers for Polymer Electrolyte Membrane Water Electrolysis

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