Indexed by:
Journal Papers
First Author:
Yan, Xiaoming
Correspondence Author:
He, GH (reprint author), Dalian Univ Technol, Sch Petr & Chem Engn, Sch Chem Engn, State Key Lab Fine Chem, 2 Dagong Rd, Panjin 124221, LN, Peoples R China.
Co-author:
Wang, Jinyan,He, Gaohong,Dong, Ziwei,Di, Mengting,Hu, Lei,Zhang, Caimian,Pan, Yu,Zhang, Ning,Jiang, Xiaobin,Wu, Xuemei
Date of Publication:
2020-02-15
Journal:
JOURNAL OF MEMBRANE SCIENCE
Included Journals:
EI、SCIE
Document Type:
J
Volume:
596
ISSN No.:
0376-7388
Key Words:
Sulfonated long side chain; Polybenzimidazole; Vanadium redox flow
battery; 1; 3-Propanesultone
Abstract:
A long-side-chain sulfonated polybenzimidazole (PBI-PS) membrane was successfully prepared by the reaction of PBI with 1, 3-propanesultone for improving the efficiencies of vanadium redox flow battery. The interaction between sulfonic acid and imidazole groups provides the PBI-PS membrane with excellent swelling resistance, leading to a swelling ratio of only 13% for the membrane with IEC of as high as 3.18 mmol g(-1). This results in an ultra-low vanadium permeability (6.5 x 10(-9) cm(2) s(-1)). The introduction of sulfonic acid-terminated flexible side chain in the membrane also constructs good microphase separation structure, leading to a low area resistance of 0.51 Omega cm(2), which is close to Nafion 212 (0.41 Omega cm(2)). This membrane exhibits excellent cell performance. The voltage and energy efficiencies are up to 90.73% and 89.13% at 80 mA cm(-2), respectively. Furthermore, the efficiencies remain constant values for 200 cycles, and no changes in chemical structure and cell efficiencies are observed after 720 h immersion in electrolyte solution.
Translation or Not:
no
