Crosslinkable sulfonated poly (diallyl-bisphenol ether ether ketone) membranes for vanadium redox flow battery application

Crosslinkable sulfonated poly (diallyl-bisphenol ether ether ketone) (SDPEEK) membranes with different degrees of sulfonation (DS) are prepared and first investigated in vanadium redox flow battery (VFB) application. The SDPEEK membranes with DS of 80% (SD4-6-100) show over an order of magnitude low...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 2012-11, Vol.217, p.309-315
Main Authors: Zhang, Hongzhang, Zhang, Huamin, Li, Xianfeng, Mai, Zhensheng, Wei, Wenping, Li, Yun
Format: Article
Language:English
Subjects:
Applied sciences
Crosslinkable polymer
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Ion exchange membranes
SDPEEK
Vanadium redox flow battery
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Crosslinkable sulfonated poly (diallyl-bisphenol ether ether ketone) (SDPEEK) membranes with different degrees of sulfonation (DS) are prepared and first investigated in vanadium redox flow battery (VFB) application. The SDPEEK membranes with DS of 80% (SD4-6-100) show over an order of magnitude lower permeability of VO2+ ions (2.4 × 10−8 vs. 1.04 × 10−6 cm2 min−1) than currently used Nafion 115. The VFB battery assembled with SD4-6-100 membrane exhibits much higher columbic efficiency (98% vs. 92% at 50 mA cm−2) and longer self-discharge time (180 h vs. 50 h) than that of Nafion 115, however, at similar energy efficiency. The membrane keeps a stable performance after 900 h charge–discharge test. In order to further improve the ions selectivity of SDPEEK membranes with high DS, the SD5-5-50 (DS 100%) membrane is crosslinked under ultraviolet (UV) radiation. The ion selectivity of the membrane is improved obviously after crosslinking, as a result, showing much higher columbic efficiency and energy efficiency. ► Crosslinkable SDPEEK membranes were prepared for VFB application. ► VFBs assembled with SDPEEK membranes show better performance than that of Nafion 115. ► The ion selectivity of SDPEEK membranes improved dramatically after UV crosslinking. ► The SDPEEK membranes keep stable after 900 h charge–discharge test.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2012.06.030