Advanced porous polyphenylsulfone membrane with ultrahigh chemical stability and selectivity for vanadium flow batteries. Issue 28 (18th March 2019)

• Record Type: Journal Article
• Authors: Shi, Manli; Liu, Lu; Tong, Yujia; Huang, Lukuan; Li, Weixing; Xing, Weihong
• Is Part Of: Journal of applied polymer science. Volume 136:Issue 28(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-03-18
• Subjects: blends -- electrochemistry -- membranes -- porous materials; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.47752
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Porous polyphenylsulfone (PPSU) membranes are facilely prepared via the nonsolvent‐induced phase separation method. The typical asymmetric structure of such prepared porous membranes can be controlled by optimizing the sulfonation degree of the sulfonated poly(ether ether ketone) to 84.7% in the casting solution. Scanning electron microscopy images show that the porous membrane comprises a thin dense top skin layer, a sublayer structure with distinct long finger‐like pores and the large pores in the substructure. The porous PPSU membrane was then used in vanadium flow battery (VFB). The optimized porous membrane yields an admirable performance, including excellent selectivity, chemical stability, and high columbic efficiency. Furthermore, the low cost of porous PPSU membranes indicates the promise of this technology for use in VFB applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019, 136, 47752. Abstract : Schematic diagram of PPSU/SPEEK porous membrane