Journal
FRONTIERS IN CHEMISTRY
Volume 6, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2018.00549
Keywords
vanadium flow battery; Sulfonated poly(ether ether ketone); SPEEK/lignin composite membrane; ion selectivity; degree of sulfonation
Categories
Funding
- Open Fund of National Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science Technology [kfj170105, kfj170107]
- National Natural Science Foundation of China [51871037, 51501024]
- Fundamental Research Funds for the Central Universities [2018CDQYCL0027]
- Chongqing Entrepreneurship and Innovation Program for the Returned Overseas Chinese Scholars [cx2017035]
Ask authors/readers for more resources
A membrane of high ion selectivity, high stability, and low cost is desirable for vanadium redox flow battery (VRB). In this study, a composite membrane is formed by blending the sulfonated poly (ether ether ketone) with lignin (SPEEK/lignin), and optimized by tailoring the degree of sulfonation. The incorporation of lignin into the SPEEK matrix provides more proton transport pathway and meanwhile adjusts the water channel to repulse vanadium ions. The VRB cells assembled with the composite membranes exhibit high coulombic efficiency (similar to 99.27%) and impressive energy efficiency (similar to 82.75%). The cells maintain a discharge capacity of similar to 95% after 100 cycles and similar to 85% after 200 cycles at 120 mA cm(-2), much higher than the commercial Nafion 212. The SPEEK/lignin composite membranes are promising for application in VRB system.
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
Share Paper
