Poly(p-phenylene)-based membrane materials with excellent cell efficiencies and durability for use in vanadium redox flow batteries. Issue 24 (30th May 2017)

• Record Type: Journal Article
• 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
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 24(2017)
• Page Start: 12285
• Page End: 12296
• Publication Date: 2017-05-30
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta03131a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : sPBPSP- z ionomers exhibit excellent cell performance in VRFBs as well as remarkable chemical stability. 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.