Soft Template-Induced Porous Polyvinylidene Fluoride Membrane for Vanadium Flow Batteries
Transactions of Tianjin University, ISSN: 1995-8196, Vol: 29, Issue: 4, Page: 284-292
2023
- 2Citations
- 1Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
Vanadium flow batteries (VFBs) are considered ideal for grid-scale, long-duration energy storage applications owing to their decoupled output power and storage capacity, high safety, efficiency, and long cycle life. However, the widespread adoption of VFBs is hindered by the use of expensive Nafion membranes. Herein, we report a soft template-induced method to develop a porous polyvinylidene fluoride (PVDF) membrane for VFB applications. By incorporating water-soluble and flexible polyethylene glycol (PEG 400) as a soft template, we induced the aggregation of hydrophilic sulfonated poly (ether ether ketone), resulting in phase separation from the hydrophobic PVDF polymer during membrane formation. This process led to the creation of a porous PVDF membrane with controllable morphologies determined by the polyethylene glycol content in the cast solution. The optimized porous PVDF membrane enabled a stable VFB performance for 200 cycles at a current density of 80 mA/cm, and the VFB exhibited a Coulombic efficiency of 95.2% and a voltage efficiency of 87.8%. These findings provide valuable insights for the development of highly stable membranes for VFB applications.
Bibliographic Details
Springer Science and Business Media LLC
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