Journal
POLYMERS
Volume 14, Issue 24, Pages -Publisher
MDPI
DOI: 10.3390/polym14245405
Keywords
vanadium redox flow battery; polysulfone; graphene oxide nanosheets; porous membranes; energy efficiency; green energy storage
Categories
Funding
- National Science and Technology Council of Taiwan (NSTC)
- NSTC
- [111-2221-E-131-020-MY3]
- [110-2622-E-131-005]
Ask authors/readers for more resources
The addition of graphene oxide nanosheets significantly improves the mechanical properties of the PSF membrane, enhances the coulombic efficiency of the VRFB, and demonstrates long-term chemical stability.
Porous nanohybrid membranes of polysulfone (PSF) with graphene oxide (GO) nanosheets (PSF/GO membrane) were developed to serve as proton exchange membranes in a vanadium redox flow battery (VRFB). Various ratios of PSF/GO and thickness were investigated to evaluate the optimal voltage efficiency (VE), coulombic efficiency (CE), and energy efficiency (EE) of the VRFB. The pore size, distribution, and hydrophilicity of PSF/GO membranes were studied using scanning electron microscopy (SEM) images and contact angles. Functional groups of GO were evaluated using Raman spectroscopy. The mechanical properties and thermal stability of PSF/GO membranes were analyzed using a tensile tester and thermogravimetric analysis (TGA), respectively. The results show that the mechanical properties of the PSF porous membrane with GO nanosheets were significantly improved, indicating that the addition of graphene oxide nanosheets consolidated the internal structure of the PSF membrane. Cyclic voltammetry revealed an obviously different curve after the addition of GO nanosheets. The CE of the VRFB in the PSF/GO membrane was significantly higher than that in the pristine PSF membrane, increasing from 80% to 95% at 0.6 wt.% GO addition. Moreover, PSF/GO membranes displayed great chemical stability during long-term operation; thus, they can evolve as potential porous membranes for application in VRFBs for green energy storage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available