TY - JOUR
T1 - Two-dimensional vermiculite nanosheets-modified porous membrane for non-aqueous redox flow batteries
AU - Liu, Tao
AU - Zhang, Cuijuan
AU - Yuan, Jiashu
AU - Zhen, Yihan
AU - Li, Yongdan
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No. 21636007 ).
Publisher Copyright:
© 2021 Elsevier B.V.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/7/15
Y1 - 2021/7/15
N2 - The non-aqueous redox flow batteries (NARFBs) are promising for large-scale energy storage. However, the crossover contamination of active materials seriously imparts the performance. Here, two-dimensional (2D) vermiculite nanosheets modified Celgard porous membrane is prepared by the filtration method. The 2D vermiculite nanosheet layers stacked on the surface of Celgard membrane effectively reduce the crossover effect by sieving electrolytes and active materials through the nanoscale intercalation channels. Furthermore, the surface-governed transport behavior of the 2D vermiculite nanosheets is conducive to the exchange of supporting electrolyte. The resultant NARFB with the modified membrane exhibits higher Coulombic efficiency (95.3% vs. 87.6%) and larger discharge capacity (0.104 vs. 0.093 Ah L−1) without obvious impact on voltage efficiency (90.1% vs. 90.5%) at 2 mA cm−2. This work provides an efficient strategy to alleviate the crossover effect in NARFBs.
AB - The non-aqueous redox flow batteries (NARFBs) are promising for large-scale energy storage. However, the crossover contamination of active materials seriously imparts the performance. Here, two-dimensional (2D) vermiculite nanosheets modified Celgard porous membrane is prepared by the filtration method. The 2D vermiculite nanosheet layers stacked on the surface of Celgard membrane effectively reduce the crossover effect by sieving electrolytes and active materials through the nanoscale intercalation channels. Furthermore, the surface-governed transport behavior of the 2D vermiculite nanosheets is conducive to the exchange of supporting electrolyte. The resultant NARFB with the modified membrane exhibits higher Coulombic efficiency (95.3% vs. 87.6%) and larger discharge capacity (0.104 vs. 0.093 Ah L−1) without obvious impact on voltage efficiency (90.1% vs. 90.5%) at 2 mA cm−2. This work provides an efficient strategy to alleviate the crossover effect in NARFBs.
KW - Crossover
KW - Membrane
KW - Non-aqueous redox flow battery
KW - Vermiculite nanosheets
UR - http://www.scopus.com/inward/record.url?scp=85105550166&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2021.229987
DO - 10.1016/j.jpowsour.2021.229987
M3 - Article
AN - SCOPUS:85105550166
SN - 0378-7753
VL - 500
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 229987
ER -
