Side chain hydrolysis method to prepare nanoporous membranes for vanadium flow battery application
| Autor: | Shoutao Gong, Lv Li, Li Panyue, Ma Yanjiao, Fengxiang Zhang, Naeem Akhtar Qaisrani, Lingling Ma, Gaohong He |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Vanadium chemistry.chemical_element Filtration and Separation 02 engineering and technology Permeation 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Flow battery 0104 chemical sciences Hydrolysis Membrane chemistry Chemical engineering Proton transport Side chain General Materials Science Physical and Theoretical Chemistry 0210 nano-technology Faraday efficiency |
| Zdroj: | Journal of Membrane Science. 560:67-76 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2018.05.014 |
| Popis: | A side-chain hydrolysis method is proposed for fabricating high performance nanoporous membranes that can be used in vanadium flow batteries (VFBs). The membranes were fabricated facilely by hydrolyzing the bulky ester groups at the side chain of a cross-linked copolymer. Such hydrolysis creates pores that function as the pathway for proton transport while the cross-links can minimize membrane swelling induced by the hydrolysis derived carboxylic acid groups. The cross-links also contain cations so that vanadium permeation can be suppressed via Donnan repulsion effect. Therefore, the fabricated membrane combines the benefits of ionic and porous membranes, and thus can balance proton conduction and the vanadium ion restriction, giving rise to a good performance in a VFB. The optimized VFB showed a coulombic efficiency of 97.3% and an energy efficiency of 82.7% at 80 mA cm−2 for 100 cycles. Our work provides a facile, novel and cost-effective method to fabricate high-performance membranes for VFB applications. |
| Databáze: | OpenAIRE |
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