| 1. |
- Khataee, Amirreza, et al.
(författare)
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Anion exchange membrane water electrolysis using Aemion membranes and nickel electrodes
- 2022
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Ingår i: Journal of Materials Chemistry A. - 2050-7488. ; 10:30, s. 16061-16070
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Tidskriftsartikel (refereegranskat)abstract
- Anion exchange membrane water electrolysis (AEMWE) is a potentially low-cost and sustainable technology for hydrogen production that combines the advantages of proton exchange membrane water electrolysis and traditional alkaline water electrolysis systems. Despite considerable research efforts in recent years, the medium-term (100 h) stability of AemionTM membranes needs further investigation. This work explores the chemical and electrochemical durability (>100 h) of AemionTM anion exchange membranes in a flow cell using nickel felt as electrode material on the anode and cathode sides. Remixing the electrolytes between the AEMWE galvanostatic tests was very important to enhance electrolytes refreshment and the voltage stability of the system. The membranes were analyzed by NMR spectroscopy after the AEMWE tests, and the results showed no sign of severe chemical degradation. In a separate experiment, the chemical stability and mechanical integrity of the membranes were studied by soaking them in a strongly alkaline electrolyte for a month (>700 h) at 90 °C, followed by NMR analysis. A certain extent of ionic loss was observed due to chemical degradation and the membranes disintegrated into small pieces.
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| 2. |
- khataee, Amirreza, et al.
(författare)
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Anion exchange membrane water electrolysis using Aemion™ membranes and nickel electrodes
- 2022
-
Ingår i: Journal of Materials Chemistry A. - : Royal Society of Chemistry (RSC). - 2050-7488 .- 2050-7496. ; 10:30, s. 16061-16070
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Tidskriftsartikel (refereegranskat)abstract
- Anion exchange membrane water electrolysis (AEMWE) is a potentially low-cost and sustainable technology for hydrogen production that combines the advantages of proton exchange membrane and traditional alkaline water electrolysis systems.
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| 3. |
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| 4. |
- Lallo, Elias, et al.
(författare)
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Vanadium Redox Flow Battery Using Aemion((TM)) Anion Exchange Membranes
- 2022
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Ingår i: Processes. - : MDPI AG. - 2227-9717. ; 10:2
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Tidskriftsartikel (refereegranskat)abstract
- The vanadium redox flow battery (VRFB) is a promising and commercially available technology that poses advantageous features for stationary energy storage. A key component of the VRFB in terms of cost and system efficiency is the membrane. In recent years, anion exchange membranes (AEMs) have gained interest in VRFB research as they in general exhibit lower vanadium crossover due to a more substantial Donnan exclusion effect. In this study, a low-resistance flow cell was developed and the electrochemical performance of Aemion (TM) anion exchange membranes AF1-HNN5-50-X, AF1-HNN8-50-X and AF1-ENN8-50-X were compared against commonly used cation exchange membranes, Nafion(R) 211 and 212. The VRFB using AF1-ENN8-50-X exhibited superior performance versus Nafion(R) 212 regarding cycling efficiency and rate performance. However, relatively high and comparable capacity losses were observed using both membranes. NMR analysis showed no sign of chemical degradation for AF1-ENN8-50-X by immersion in VO2+ solution for 800 h. Although Aemion (TM) AEMs showed good chemical and electrochemical performance, considerable electrolyte crossover was observed due to high water uptake.
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