Robust and durable poly(aryl-<i>co</i>-aryl piperidinium) reinforced membranes for alkaline membrane fuel cells

Hu, Chuan; Park, Jong Hyeong; Kim, Hae Min; Wang, Ho Hyun; Bae, Joon Yong; Liu, Meiling; Kang, Na Yoon; Yoon, Kyoung-seok; Park, Chang-dae; Chen, Nanjun; Lee, Young Moo

doi:10.1039/d2ta00196a

Cited by 32 publications

(19 citation statements)

References 49 publications

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“…When the scanning range is 0.1–0.6 V. The current density of QPDI-100 at 0.6 V is less than 3.5 mA cm –2 . This also further indicates that the QPDI-100 dose not exhibit the gas mixing phenomenon due to the pore structure in the actual application of batteries, which provides favorable evidence for its feasibility in AEMFC application. − …”

Section: Resultsmentioning

confidence: 90%

High Conductive Anion Exchange Membranes from All-Carbon Twisted Intrinsic Microporous Polymers

et al. 2022

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This study obtained solution-tractable anion-selective membranes with intrinsic porous and highly ionic conductive capabilities by a convenient route. We used the coplanar structure of 9,9-dimethylxanthene to construct a rigid twisted intrinsic microporous all-carbon skeleton PDI with up to 363.4 m 2 g −1 of Brunauer−Emmett−Teller surface, and the pore was filled with a quaternary ammonium salt containing long flexible alkyl chains, which produced an efficient means of OH − transport. The conductivity of the resulting polymer (QPDI-100) is reached as high as 205 mS cm −1 at 80 °C. The size stability was determined to be good at high conductance and swelling ratio is less than 15% at 80 °C. QPDI-a exhibited good stability under alkaline conditions, and 90% of the conductivity of QPDI-100 was retained after being immersed in 1 M NaOH solution at 60 °C for 40 days. The power density of H 2 −O 2 fuel cells at 60 °C was 437.7 mW cm −2 . The prepared intrinsic porous anion exchange membranes (AEMs) demonstrate potential for the development of anion exchange membrane fuel cells. This membrane design strategy paves the way for a new generation of AEMs for the purposes of electrochemical energy conversion and storage.

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Section: Resultsmentioning

confidence: 90%

High Conductive Anion Exchange Membranes from All-Carbon Twisted Intrinsic Microporous Polymers

et al. 2022

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“…As shown in Fig. 6d , the all-in-one MEA-R with an initial cell voltage of ~2.0 V operated stably at a high current density of 2000 mA cm −2 for ~1200 h without any voltage decay owing to its preferable mechanical properties 4 . Impressively, the all-in-one MEA (CoNiS@FeNi LDH) demonstrated a low voltage of 1.57 V at a current density of 1000 mA cm -2 for 1000 h, which represented a cell energy efficiency of 94% (HHV).…”

Section: Resultsmentioning

confidence: 92%

“…The BPP of the composite membrane in the all-in-one MEA-S reached 11.1 bar, which was significantly higher than that of the pristine PP (1.0 bar) and commercial Zirfon (2.5 bar) membranes. This high BPP was attributed to the extensive incorporation of nanosheet networks into the robust polymer matrix 4 . Figure 3f shows the area resistance of commercial membranes and the all-in-one MEA-S as a function of KOH solution concentration.…”

Section: Resultsmentioning

confidence: 99%

“…Electrolyte penetration into the pristine PP and commercial Zirfon Thin membranes was difficult, while for the all-in-one MEA-S, entire liquid droplets spread into the composite membrane almost instantaneously. This phenomenon was attributed to the inherent hydrophilicity of the metal sulfide, which enhanced the wettability of the composite membranes 4,25 . To avoid gas crossover occurring by mixing with a gassaturated electrolyte, good gas barrier properties for membranes are indispensable 26,27 .…”

Section: Resultsmentioning

confidence: 99%

“…However, conventional alkaline water electrolysers have certain critical disadvantages. Gas bubble formation and the thick porous membranes employed cause ohmic loss, which significantly reduces the energy efficiency of conventional alkaline water electrolysers and severely limits high current density performance 4 .…”

Section: Introductionmentioning

confidence: 99%

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Oriented intergrowth of the catalyst layer in membrane electrode assembly for alkaline water electrolysis

Wan

Pang

et al. 2022

Nat Commun

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The application of membrane electrode assemblies is considered a promising approach for increasing the energy efficiency of conventional alkaline water electrolysis. However, previous investigations have mostly focused on improving membrane conductivity and electrocatalyst activity. This study reports an all-in-one membrane electrode assembly obtained by de novo design. The introduction of a porous membrane readily enables the oriented intergrowth of ordered catalyst layers using solvothermal methods, leading to the formation of an all-in-one MEA for alkaline water electrolysis. This all-in-one MEA features ordered catalyst layers with large surface areas, a low-tortuosity pore structure, integrated catalyst layer/membrane interfaces, and a well-ordered OH- transfer channel. Owing to this design, a high current density of 1000 mA cm−2 is obtained at 1.57 V in 30 wt% KOH, resulting in a 94% energy efficiency. This work highlights the prospects of all-in-one membrane electrode assemblies in designing next-generation high-performance alkaline water electrolysis.

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Overview of Ion Exchange Membranes

2024

Ion Exchange Membranes

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Robust and durable poly(aryl-co-aryl piperidinium) reinforced membranes for alkaline membrane fuel cells

Abstract: Robust and durable anion exchange membranes are crucial for cost-effective anion exchange membrane fuel cells (AEMFCs). Herein, we report high-performance poly(aryl-co-aryl piperidinium) (c-PAP) reinforced membranes with >95% visible light transmittance...

Cited by 32 publications

References 49 publications

High Conductive Anion Exchange Membranes from All-Carbon Twisted Intrinsic Microporous Polymers

High Conductive Anion Exchange Membranes from All-Carbon Twisted Intrinsic Microporous Polymers

Oriented intergrowth of the catalyst layer in membrane electrode assembly for alkaline water electrolysis

Overview of Ion Exchange Membranes

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