Two-dimensional metal-organic framework nanosheets-modified porous separator for non-aqueous redox flow batteries
No Thumbnail Available
Access rights
openAccess
acceptedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2020-10-15
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
Series
Journal of Membrane Science, Volume 612
Abstract
Non-aqueous redox flow batteries (NARFBs) are promising for large-scale energy storage. However, the lack of high performance membrane is still impeding their further development. Two-dimensional (2D) metal-organic framework (MOF) nanosheets-modified porous separators are prepared by the filtration method. The NARFBs constructed with the 2D MOF nanosheets-modified separator exhibit substantially higher Coulombic efficiency (91.0% vs 82.9%) without obvious compromise on voltage efficiency (93.7% vs 94.2%), and larger average discharge capacity (1.30 vs 0.86 Ah L−1) compared with the pristine Celgard separator at 4 mA cm−2. Such performance is originated from the unique microstructure of 2D-MOF nanosheets. The interlayer spaces assembled by the nanosheet layers enable the fast transport of supporting electrolyte but impede the crossover of active materials and impose limited effect on the separator resistance. This work provides a facile and efficient strategy to mitigating the crossover effect in NARFB.Description
Keywords
Energy storage, Metal-organic frameworks, Nanosheet, Non-aqueous redox flow battery, Porous separator
Other note
Citation
Yuan, J, Zhang, C, Liu, T, Zhen, Y, Pan, Z Z & Li, Y 2020, ' Two-dimensional metal-organic framework nanosheets-modified porous separator for non-aqueous redox flow batteries ', Journal of Membrane Science, vol. 612, 118463 . https://doi.org/10.1016/j.memsci.2020.118463