wiki:pub:j.memsci.2016.10.050
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wiki:pub:j.memsci.2016.10.050 [2017/04/07 13:33] 张伟明 |
wiki:pub:j.memsci.2016.10.050 [2017/04/07 13:43] (当前版本) 张伟明 |
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| ===== Preparation of covalently cross-linked sulfonated polybenzimidazole membranes for vanadium redox flow battery applications ===== | ===== Preparation of covalently cross-linked sulfonated polybenzimidazole membranes for vanadium redox flow battery applications ===== | ||
| - | Zijun Xiaa, b, Libin Yinga, Jianhua Fanga, , , Yu-Yu Duc, Wei-Ming Zhangc, , , Xiaoxia Guoa, Jie Yina | + | //J. Membr. Sci.// **2017**, 525, Pages 229--239 (1 March 2017)\\ |
| - | Show more | + | By Zijun Xia, Libin Ying, Jianhua Fang*, Yu-Yu Du, Wei-Ming Zhang*, Xiaoxia Guo, Jie Yin\\ |
| - | http://doi.org/10.1016/j.memsci.2016.10.050 | + | [[http://www.sciencedirect.com/science/article/pii/S0376738816303854|j.memsci.2016.10.050]], {{ :wiki:pub:2016-j.memsci.2016.10.050-spbi_membranes_for_vfbs-sjtu.pdf | local fulltext}} |
| {{ :wiki:pub:toc_j.memsci.2016.10.050.jpg |}} | {{ :wiki:pub:toc_j.memsci.2016.10.050.jpg |}} | ||
| - | Highlights | ||
| - | * Highly sulfonated polybenzimidazoel copolymers have been synthesized. | ||
| - | * The covalently cross-linked sulfonated polybenzimidazole membranes exhibit 3-4 orders of magnitude lower VO2+ permeability and 6–30 times higher H/V selectivity than Nafion 117. | ||
| - | * The redox flow battery assembled with a cross-linked membrane exhibits high energy efficiency (85%) at 60 mA cm−2. | ||
| - | * The redox flow battery displays little performance decay after 300 charge-discharge cycles. | ||
| - | |||
| - | Abstract | ||
| A series of polybenzimidazole copolymers with varied content of pendant amino groups have been synthesized by condensation polymerization of 4,4′-dicarboxydiphenyl ether (DCDPE), 5-aminoisophthalic acid (APTA) and 3,3′-diaminobenzidine (DAB) in polyphosphoric acid at 190 °C for 20 h. The resulting copolymers undergo post-sulfonatation in fuming sulfuric acid at 100 °C yielded the highly sulfonated polybenzimidazoles (SOPBI-NH2(x/y), ‘x/y’ refers to the monomer molar ratio of DCDPE to APTA). A series of covalently cross-linked membranes (CSOPBI-NH2(x/y)) with good mechanical properties are fabricated by solution cast technique using bisphenol A epoxy resin as a cross-linker. The CSOPBI membranes show 3–4 orders of magnitude lower VO2+ permeability and 6–30 times higher ion diffusion selectivity (proton vs. VO2+) than Nafion117. The charge-discharge behaviors of the vanadium redox flow batteries (VRBs) assembled with the CSOPBI-NH2(x/y) membranes and Nafion 117 are investigated and compared. The VRBs assembled with the CSOPBI membranes exhibit significantly higher columbic efficiency and lower self-discharge rate than that assembled with Nafion 117 owing to the extremely lower vanadium cations crossover of the former. The VRB assembled with the CSOPBI-NH2(9/1) membrane exhibits fairly high energy efficiency (~85% at 60 mA cm−2) and little decay in performance is observed after 300 charge-discharge cycles. | A series of polybenzimidazole copolymers with varied content of pendant amino groups have been synthesized by condensation polymerization of 4,4′-dicarboxydiphenyl ether (DCDPE), 5-aminoisophthalic acid (APTA) and 3,3′-diaminobenzidine (DAB) in polyphosphoric acid at 190 °C for 20 h. The resulting copolymers undergo post-sulfonatation in fuming sulfuric acid at 100 °C yielded the highly sulfonated polybenzimidazoles (SOPBI-NH2(x/y), ‘x/y’ refers to the monomer molar ratio of DCDPE to APTA). A series of covalently cross-linked membranes (CSOPBI-NH2(x/y)) with good mechanical properties are fabricated by solution cast technique using bisphenol A epoxy resin as a cross-linker. The CSOPBI membranes show 3–4 orders of magnitude lower VO2+ permeability and 6–30 times higher ion diffusion selectivity (proton vs. VO2+) than Nafion117. The charge-discharge behaviors of the vanadium redox flow batteries (VRBs) assembled with the CSOPBI-NH2(x/y) membranes and Nafion 117 are investigated and compared. The VRBs assembled with the CSOPBI membranes exhibit significantly higher columbic efficiency and lower self-discharge rate than that assembled with Nafion 117 owing to the extremely lower vanadium cations crossover of the former. The VRB assembled with the CSOPBI-NH2(9/1) membrane exhibits fairly high energy efficiency (~85% at 60 mA cm−2) and little decay in performance is observed after 300 charge-discharge cycles. | ||
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| - | Keywords | ||
| - | Sulfonated polybenzimidazole; Membrane; Cross-linking; Vanadium permeability; Redox flow battery performance | ||
wiki/pub/j.memsci.2016.10.050.1491543225.txt.gz · 最后更改: 2017/04/07 13:33 由 张伟明
