Twisted ether-free polymer based alkaline membrane for high-performance water electrolysis

Yan, Xiaoming; Yang, Xiong; Su, Xiaoyan; Gao, Li; Zhao, Jun; Hu, Lei; Di, Mengting; Li, Tiantian; Ruan, Xuehua; He, Gaohong

doi:10.1016/j.jpowsour.2020.228805

Cited by 48 publications

(38 citation statements)

References 56 publications

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“…Although the current density was around 150 mA/cm 2 at 2 V in 1 M KOH at 70 C, the MEA with Ni thin film cathode prepared from the same method was stable during 45 hours continuous operation with 0.12% V/h voltage reduction. Others that employed electrodes prepared through electrodeposition are the Ni deposited with Co 44 and the NiFeCoP 145 as OER anodes. However, these studies have no clear comparison on the AEMWE performance between those with electrodeposited electrodes and those that utilized ionomers in their fabrication.…”

Section: Ionomer/binder-free Ccs Methodsmentioning

confidence: 99%

Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

Sulaiman

Wong

Loh

2021

Intl J of Energy Research

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Anion exchange membrane water electrolyzer (AEMWE) is a promising technology in water electrolysis for the production of green hydrogen. Unlike conventional alkaline water electrolyzers (AWE), AEMWEs utilize mild alkaline conditions and anion exchange membranes as separators and ionic conductors, respectively. However, the largest merit of AEMWE is the utilization of lowcost transition metals as electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Achieving excellent AEMWE performance using highly active and robust transition metal electrocatalysts is desired for lowering the fabrication cost and realizing the successful commercialization of AEMWE. Water splitting efficiency in the AEMWE largely depends on the kinetics of the HER and OER catalysts. Such a condition requires proper understanding of the reaction mechanisms, careful design and optimization of catalyst materials, and maintenance of catalyst durability under AEMWE conditions during long-term operation. This review discussed recent transition metal HER, OER, and bifunctional water splitting electrocatalysts applied within the actual AEMWE membrane electrode assembly (MEA), where their influence toward the electrolyzer cell performance is highlighted. Additionally, the MEA fabrication methods are briefly addressed.From the review, potential electrocatalyst materials and remaining challenges are identified to provide for future improvements on the AEMWE system.

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Section: Ionomer/binder-free Ccs Methodsmentioning

confidence: 99%

Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

Sulaiman

Wong

Loh

2021

Intl J of Energy Research

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“…Much effort has been focused on the development of highly efficient membranes. Twisted ether-free polyarylene piperidinium, synthesized via acid-catalyzed polycondensation reaction, characterized by efficient ion-conducting channels, which provide an hydroxide conductivity of 37 mS•cm −1 at 30 • C, has been proposed [166]. The cell based on this membrane has a high current density of 1064 mA•cm −2 at 2.5 V under 1 M KOH and 50 • C and a high frequency resistance of 0.165 Ω•cm −2 at 1.8 V. The durability test, performed at current density of 200 mA•cm −2 showed a voltage of 2.1 V for more than 500 h.…”

Section: Anion Exchange Membrane Electrolysis Cellmentioning

confidence: 99%

Main Hydrogen Production Processes: An Overview

et al. 2021

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Due to its characteristics, hydrogen is considered the energy carrier of the future. Its use as a fuel generates reduced pollution, as if burned it almost exclusively produces water vapor. Hydrogen can be produced from numerous sources, both of fossil and renewable origin, and with as many production processes, which can use renewable or non-renewable energy sources. To achieve carbon neutrality, the sources must necessarily be renewable, and the production processes themselves must use renewable energy sources. In this review article the main characteristics of the most used hydrogen production methods are summarized, mainly focusing on renewable feedstocks, furthermore a series of relevant articles published in the last year, are reviewed. The production methods are grouped according to the type of energy they use; and at the end of each section the strengths and limitations of the processes are highlighted. The conclusions compare the main characteristics of the production processes studied and contextualize their possible use.

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“…Use of catalyst is essential to ensure that the electrolytic reactions at both the anode and the cathode occur at practical rates. 21,22 For this purpose, the catalyst or membrane layer is coated either (a) directly on the membrane or catalyst layer surface, respectively, [23][24][25] or (b) on the porous gas diffusion electrodes (i.e., carbon paper/cloth or metal supports like Ti mesh or sintered microporous Ti). 24,26,27 Beside catalyst, the practical applicability of electrolyzers in hydrogen production depends upon the cost as well as the chemical stability, ionic conductivity and gas-barrier properties of the membrane.…”

Section: Brief Aspects Of Catalysts and Membranes In Wementioning

confidence: 99%

Structures and properties of polymers in ion exchange membranes for hydrogen generation by water electrolysis

Gohil

Dutta

2021

Polymers for Advanced Techs

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Water electrolysis (WE) is an electrochemical process that splits water and forms hydrogen and oxygen, in presence of catalyst. This is a rapidly developing technology owing to its extreme importance in the generation of hydrogen. Membrane-based WE involves the use of anion exchange, proton exchange and bipolar membranes, among which the anion exchange membrane-based WE technology is in the most advanced stage, followed by the proton exchange membrane-based WE. While, the bipolar membrane-based WE is the most nascent technology. Among the different categories of membranes used, polymer-based membranes are the most acceptable ones. It is evident that the structure and properties of the polymers that constitute a membrane play the most important role in determining its applicability in WE application. Keeping this in mind, this review is dedicatedly focused on the different polymers that have been majorly used so far in fabrication of anion exchange, proton exchange, and bipolar membranes for WE, and exclusively analyzes the influence imparted by the structure and properties of the involved polymers on the final performance of the membranes.

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Twisted ether-free polymer based alkaline membrane for high-performance water electrolysis

Cited by 48 publications

References 56 publications

Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

Main Hydrogen Production Processes: An Overview

Structures and properties of polymers in ion exchange membranes for hydrogen generation by water electrolysis

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