Advanced Zirfon-type porous separator for a high-rate alkaline electrolyser operating in a dynamic mode

Lee, Hae-In; Mehdi, Muhammad; Kim, Sang Kyung; Cho, Hyun‐Seok; Kim, Min-Joong; Cho, Won Chul; Rhee, Young Woo; Kim, Chang Hee

doi:10.1016/j.memsci.2020.118541

Cited by 74 publications

(39 citation statements)

References 32 publications

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“…39). Alkaline water electrolysis employing the all-inone MEA-S outperformed most previously reported ALWE 4,[36][37][38][39][40][41] and AEMWE without platinum group metals (PGMs) 14,21,[42][43][44][45][46][47] (Fig. 4f Supplementary Table 3).…”

Section: Resultssupporting

confidence: 50%

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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Section: Resultssupporting

confidence: 50%

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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“…6 Additionally, hydrogen permeation through porous separators causes a potential safety hazard. 7 The overall system constraints result in a limited current density (<500 mA cm −2 ), thus leading to a low hydrogen production rate. To overcome these drawbacks, the advanced alkaline electrolyzer by means of a MEA structure combines the merits of both traditional alkaline electrolyzers and PEM electrolyzers as it can employ low-cost transition metal catalysts and has a zero-gap structure as in PEM electrolyzers.…”

Section: Introductionmentioning

confidence: 99%

Overall design of novel 3D-ordered MEA with drastically enhanced mass transport for alkaline electrolyzers

Wan

et al. 2022

Energy Environ. Sci.

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“…Materials and performance of porous diaphragms for AECs (including PSU-based composite diaphragms, − , other composite diaphragms , and ceramic diaphragms ,,,,,− ).…”

Section: Elevated Temperature Alkaline Electrolysis Cells (Et-aecs)mentioning

confidence: 99%

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

et al. 2023

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Since severe global warming and related climate issues have been caused by the extensive utilization of fossil fuels, the vigorous development of renewable resources is needed, and transformation into stable chemical energy is required to overcome the detriment of their fluctuations as energy sources. As an environmentally friendly and efficient energy carrier, hydrogen can be employed in various industries and produced directly by renewable energy (called green hydrogen). Nevertheless, large-scale green hydrogen production by water electrolysis is prohibited by its uncompetitive cost caused by a high specific energy demand and electricity expenses, which can be overcome by enhancing the corresponding thermodynamics and kinetics at elevated working temperatures. In the present review, the effects of temperature variation are primarily introduced from the perspective of electrolysis cells. Following an increasing order of working temperature, multidimensional evaluations considering materials and structures, performance, degradation mechanisms and mitigation strategies as well as electrolysis in stacks and systems are presented based on elevated temperature alkaline electrolysis cells and polymer electrolyte membrane electrolysis cells (ET-AECs and ET-PEMECs), elevated temperature ionic conductors (ET-ICs), protonic ceramic electrolysis cells (PCECs) and solid oxide electrolysis cells (SOECs).

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Advanced Zirfon-type porous separator for a high-rate alkaline electrolyser operating in a dynamic mode

Cited by 74 publications

References 32 publications

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

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

Overall design of novel 3D-ordered MEA with drastically enhanced mass transport for alkaline electrolyzers

Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

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