Performance and stability of a critical raw materials-free anion exchange membrane electrolysis cell

Zignani, Sabrina Campagna; Faro, Massimiliano Lo; Carbone, A.; Italiano, Cristina; Trocino, Stefano; Monforte, Giuseppe; Aricò, A.S.

doi:10.1016/j.electacta.2022.140078

Cited by 30 publications

(32 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…476–479 In addition to the operation conditions and electrocatalyst, the durability of AEM water electrolyzers and the test protocol warrant further investigations. 472,480–482 Fig. 31e and f give two typical examples showing that record-high current density and durability have been achieved for AEM water electrolysis cells.…”

Section: Key Components Of Aem Water Electrolyzers and Fuel Cellsmentioning

confidence: 97%

Anion-exchange membrane water electrolyzers and fuel cells

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Key Components Of Aem Water Electrolyzers and Fuel Cellsmentioning

confidence: 97%

Anion-exchange membrane water electrolyzers and fuel cells

et al. 2022

View full text Add to dashboard Cite

show abstract

“…However, it should be noted that the ASR decreased from 0.28 Ω cm 2 to 0.06 Ω cm 2 (corresponding to 43 mS cm –1 ) when the cell was operated with a liquid KOH feed instead of pure water. The performance benefits of operating with an aqueous KOH support electrolyte are also well-documented by the comprehensive study by Zignani et al . for AEM cells equipped with various nickel-based electrode chemistries.…”

mentioning

confidence: 72%

“…A common way to reduce additional voltage losses is to operate the cell with a dilute aqueous support electrolyte of 0.5–5 wt% KOH, , suggesting that the predominating ohmic voltage losses originate from ionic resistance contributions within the electrodes or at the membrane–electrode interface. The conductivity of 5 wt% aqueous KOH at 80 °C exceeds 300 mS cm –1 , and with such a support electrolyte present within the electrode and at the membrane–electrode interface, the conduction does not solely rely on having a well-dispersed and interconnected ionomer phase that provides ionic contact between the electrodes and the membrane.…”

mentioning

confidence: 99%

“…However, it should be noted that the ASR decreased from 0.28 Ω cm 2 to 0.06 Ω cm 2 (corresponding to 43 mS cm −1 ) when the cell was operated with a liquid KOH feed instead of pure water. The performance benefits of operating with an aqueous KOH support electrolyte are also well-documented by the comprehensive study by Zignani et al 26 for AEM cells equipped with various nickel-based electrode chemistries. It should also be noted that current densities far exceeding 4000 mA cm −2 at <1.9 V have been reported for AEM cells, but this has so far only been achieved when combined with precious metal electrodes and alkaline support electrolytes to govern both catalyst kinetics and ion conductivity.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Electrode Separators for the Next-Generation Alkaline Water Electrolyzers

et al. 2023

View full text Add to dashboard Cite

Multi-gigawatt-scale hydrogen production by water electrolysis is central in the green transition when it comes to storage of energy and forming the basis for sustainable fuels and materials. Alkaline water electrolysis plays a key role in this context, as the scale of implementation is not limited by the availability of scarce and expensive raw materials. Even though it is a mature technology, the new technological context of the renewable energy system demands more from the systems in terms of higher energy efficiency, enhanced rate capability, as well as dynamic, part-load, and differential pressure operation capability. New electrode separators that can support high currents at small ohmic losses, while effectively suppressing gas crossover, are essential to achieving this. This Focus Review compares the three main development paths that are currently being pursued in the field with the aim to identify the advantages and drawbacks of the different approaches in order to illuminate rational ways forward.

show abstract

“…In particular, hydrogen obtained from the electrolysis of water is proposed as an alternative to fossil fuels in many applications [ 5 , 6 ]. There are several electrolyzer technologies (Alkaline [ 7 , 8 , 9 ], Proton Exchange Membrane (PEMEL) [ 10 , 11 , 12 ], anion exchange membrane (AEM) [ 13 , 14 , 15 , 16 ] and Solid Oxide Electrolyzer [ 17 , 18 , 19 ]) with a different degree of technological and commercial maturity. Generally, the energy used for electrochemical water splitting determines the “quality” of hydrogen and the associated environmental load [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

et al. 2023

View full text Add to dashboard Cite

To realize the benefits of a hydrogen economy, hydrogen must be produced cleanly, efficiently and affordably from renewable resources and, preferentially, close to the end-users. The goal is a sustainable cycle of hydrogen production and use: in the first stage of the cycle, hydrogen is produced from renewable resources and then used to feed a fuel cell. This cycle produces no pollution and no greenhouse gases. In this context, the development of electrolyzers producing high-purity hydrogen with a high efficiency and low cost is of great importance. Electrode materials play a fundamental role in influencing electrolyzer performances; consequently, in recent years considerable efforts have been made to obtain highly efficient and inexpensive catalyst materials. To reach both goals, we have developed electrodes based on Pd–Co alloys to be potentially used in the PEMEL electrolyzer. In fact, the Pd–Co alloy is a valid alternative to Pt for hydrogen evolution. The alloys were electrodeposited using two different types of support: carbon paper, to fabricate a porous structure, and anodic alumina membrane, to obtain regular arrays of nanowires. The goal was to obtain electrodes with very large active surface areas and a small amount of material. The research demonstrates that the electrochemical method is an ideal technique to obtain materials with good performances for the hydrogen evolution reaction. The Pd–Co alloy composition can be controlled by adjusting electrodeposition parameters (bath composition, current density and deposition time). The main results concerning the fabrication process and the characterization are presented and the performance in acid conditions is discussed.

show abstract

Performance and stability of a critical raw materials-free anion exchange membrane electrolysis cell

Cited by 30 publications

References 63 publications

Anion-exchange membrane water electrolyzers and fuel cells

Anion-exchange membrane water electrolyzers and fuel cells

Electrode Separators for the Next-Generation Alkaline Water Electrolyzers

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

Contact Info

Product

Resources

About