Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 24, Pages 12285-12296Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta03131a
Keywords
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Funding
- Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20152010103210]
- Technology Innovation Program (Cation/anion exchange and adsorption polymers for desalination applications) - Ministry of Trade, Industry and Energy (MOTIE, Korea) [10047796]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20152010103210] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Poly(p-phenylene)-based ionomers with remarkable durability and rate capability for use in vanadium redox flow batteries (VRFBs) are reported. The family of synthesized ionomers, sPBPSP-z, exhibited not only well-developed phase separation between hydrophilic domains and hydrophobic domains but also well-connected hydrophilic channels, resulting in enhanced proton conductivities and excellent dimensional stabilities. sPBPSP-8, which has an ion exchange capacity of 1.83 meq g(-1), showed high discharge capacity retention and superior efficiencies over 100 cycles at a current density of 50 mA cm(-2). In addition, the sPBPSP-8 ionomer exhibited stable performance at various current densities (50-180 mA cm(-2)) and retained high efficiencies at high current densities. Furthermore, this material exhibited superior chemical stability under oxidizing conditions, excellent capacity retention, and high efficiencies during long-term VRFB operation (1000 cycles). These results indicate that the sPBPSP-8 membrane is a superb material for VRFB applications.
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