Poly(p-phenylene)-based membrane materials with excellent cell efficiencies and durability for use in vanadium redox flow batteries
- Authors
- Shin, Hee Young; Cha, Min Suc; Hong, Soo Hyun; Kim, Tae-Ho; Yang, Dae-Soo; Oh, Seong-Geun; Lee, Jang Yong; Hong, Young Taik
- Issue Date
- Jun-2017
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.5, no.24, pp.12285 - 12296
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 5
- Number
- 24
- Start Page
- 12285
- End Page
- 12296
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/152296
- DOI
- 10.1039/c7ta03131a
- ISSN
- 2050-7488
- Abstract
- 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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