Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow Batteries
Both cation-exchange membranes and anion-exchange membranes are used as ion conducting membranes in vanadium redox flow batteries (VRFBs). Anion-exchange membranes (AEMs) are applied in vanadium redox flow batteries due to the high blocking property of vanadium ions via the Donnan exclusion effect....
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-06-01
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| Series: | Membranes |
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| Online Access: | http://www.mdpi.com/2077-0375/8/2/33 |
| _version_ | 1797710773170995200 |
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| author | Hyeongrae Cho Henning M. Krieg Jochen A. Kerres |
| author_facet | Hyeongrae Cho Henning M. Krieg Jochen A. Kerres |
| author_sort | Hyeongrae Cho |
| collection | DOAJ |
| description | Both cation-exchange membranes and anion-exchange membranes are used as ion conducting membranes in vanadium redox flow batteries (VRFBs). Anion-exchange membranes (AEMs) are applied in vanadium redox flow batteries due to the high blocking property of vanadium ions via the Donnan exclusion effect. In this study, novel anion-exchange blend membranes (AEBMs) were prepared, characterized, and applied in VRFBs. Bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide), poly[(1-(4,4′-diphenylether)-5-oxybenzimidazole)-benzimidazole] (PBI-OO) and sulfonated polyether sulfone polymer were combined to prepare 3-component AEBMs with 1,2,4,5-tetramethylimidazole (TMIm) for quaternization. 3-component AEBMs showed significantly enhanced chemical and mechanical properties compared with those of 2-component AEBMs, resulting in an improved performance in VRFBs. The compositions of the anion-exchange polymers in 3-component AEBMs were systematically varied to optimize the AEBMs for the redox-flow battery application. While the 3-component AEBMs showed comparable efficiencies with Nafion® 212 membranes, they displayed improved vanadium ions cross-over as was confirmed by open circuit voltage tests and capacity fade tests conducted in VRFBs. In addition, one of the synthesized 3-component AEBM had a superior coulombic efficiency and capacity retention in a charging–discharging test over 300 cycles at a current density of 40 mA/cm2. It can thus be concluded that 3-component AEBMs are promising candidates for long-term operation in VRFBs. |
| first_indexed | 2024-03-12T06:56:07Z |
| format | Article |
| id | doaj.art-746be664f99c4a4c82f830d9a5f043f4 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-12T06:56:07Z |
| publishDate | 2018-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-746be664f99c4a4c82f830d9a5f043f42023-09-03T00:00:42ZengMDPI AGMembranes2077-03752018-06-01823310.3390/membranes8020033membranes8020033Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow BatteriesHyeongrae Cho0Henning M. Krieg1Jochen A. Kerres2Institute of Chemical Process Engineering, University of Stuttgart, 70199 Stuttgart, GermanyFaculty of Natural Science, North-West University, Focus Area: Chemical Resource Beneficiation, Potchefstroom 2520, South AfricaInstitute of Chemical Process Engineering, University of Stuttgart, 70199 Stuttgart, GermanyBoth cation-exchange membranes and anion-exchange membranes are used as ion conducting membranes in vanadium redox flow batteries (VRFBs). Anion-exchange membranes (AEMs) are applied in vanadium redox flow batteries due to the high blocking property of vanadium ions via the Donnan exclusion effect. In this study, novel anion-exchange blend membranes (AEBMs) were prepared, characterized, and applied in VRFBs. Bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide), poly[(1-(4,4′-diphenylether)-5-oxybenzimidazole)-benzimidazole] (PBI-OO) and sulfonated polyether sulfone polymer were combined to prepare 3-component AEBMs with 1,2,4,5-tetramethylimidazole (TMIm) for quaternization. 3-component AEBMs showed significantly enhanced chemical and mechanical properties compared with those of 2-component AEBMs, resulting in an improved performance in VRFBs. The compositions of the anion-exchange polymers in 3-component AEBMs were systematically varied to optimize the AEBMs for the redox-flow battery application. While the 3-component AEBMs showed comparable efficiencies with Nafion® 212 membranes, they displayed improved vanadium ions cross-over as was confirmed by open circuit voltage tests and capacity fade tests conducted in VRFBs. In addition, one of the synthesized 3-component AEBM had a superior coulombic efficiency and capacity retention in a charging–discharging test over 300 cycles at a current density of 40 mA/cm2. It can thus be concluded that 3-component AEBMs are promising candidates for long-term operation in VRFBs.http://www.mdpi.com/2077-0375/8/2/33anion-exchange blend membranevanadium redox flow batteryvanadium ions cross-overcharging–discharging testcoulombic efficiency |
| spellingShingle | Hyeongrae Cho Henning M. Krieg Jochen A. Kerres Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow Batteries Membranes anion-exchange blend membrane vanadium redox flow battery vanadium ions cross-over charging–discharging test coulombic efficiency |
| title | Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow Batteries |
| title_full | Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow Batteries |
| title_fullStr | Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow Batteries |
| title_full_unstemmed | Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow Batteries |
| title_short | Application of Novel Anion-Exchange Blend Membranes (AEBMs) to Vanadium Redox Flow Batteries |
| title_sort | application of novel anion exchange blend membranes aebms to vanadium redox flow batteries |
| topic | anion-exchange blend membrane vanadium redox flow battery vanadium ions cross-over charging–discharging test coulombic efficiency |
| url | http://www.mdpi.com/2077-0375/8/2/33 |
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