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A Sulfonated Polyimide/Nafion Blend Membrane with High Proton Selectivity and Remarkable Stability for Vanadium Redox Flow Battery
| Content Provider | MDPI |
|---|---|
| Author | Li, Jinchao Liu, Jun Xu, Wenjie Long, Jun Huang, Wenheng He, Zhen Liu, Suqin Zhang, Yaping |
| Copyright Year | 2021 |
| Description | A sulfonated polyimide (SPI)/Nafion blend membrane composed of a designed and synthesized SPI polymer and the commercial Nafion polymer is prepared by a facile solution casting method for vanadium redox flow battery (VRFB). Similar molecular structures of both SPI and Nafion provide good compatibility and complementarity of the blend membrane. ATR-FTIR,$ ^{1}$H-NMR, AFM, and SEM are used to gain insights on the chemical structure and morphology of the blend membrane. Fortunately, the chemical stability of the SPI/Nafion blend membrane is effectively improved compared with reported SPI-based membranes for VRFB applications. In cycling charge-discharge tests, the VRFB with the as-prepared SPI/Nafion blend membrane shows excellent battery efficiencies and operational stability. Above results indicate that the SPI/Nafion blend membrane is a promising candidate for VRFB application. This work opens up a new possibility for fabricating high-performance SPI-based blend membrane by introduction of a polymer with a similar molecular structure and special functional groups into the SPI polymer. |
| Starting Page | 946 |
| e-ISSN | 20770375 |
| DOI | 10.3390/membranes11120946 |
| Journal | Membranes |
| Issue Number | 12 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-11-29 |
| Access Restriction | Open |
| Subject Keyword | Membranes Environmental Engineering Polymer Science Sulfonated Polyimide Blend Membrane Vanadium Redox Flow Battery Chemical Stability |
| Content Type | Text |
| Resource Type | Article |
