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A super thin polytetrafluoroethylene/sulfonated poly(ether ether ketone) membrane with 91% energy efficiency and high stability for vanadium redox flow battery

  • Jicui Dai
  • , Xiangguo Teng*
  • , Yiqiao Song
  • , Xiaomei Jiang
  • , Geping Yin
  • *Corresponding author for this work
  • School of Marine Science and Technology, Harbin Institute of Technology Weihai
  • School of Chemistry and Chemical Engineering, Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

In order to further decrease the cost and enhance the durability of sulfonated poly(ether ether ketone) membrane for vanadium redox flow battery, a super thin (40 μm) polytetrafluoroethylene (PTFE)/SPEEK (PS) membrane is prepared. The physico-chemical properties and single cell performance of PS membranes prepared with different casting solvents including NMP (N-methyl-2-pyrrolidone), DMF (N,N′-dimethylformamide), and DMAc (N,N′-dimethylacetamide) have been investigated. Results show that the energy efficiency of VRB with PS/DMF can reach up to 91.2% at the current density of 40 mA cm-2, which is 11.1% and 6.4% higher than that of the commercial Nafion 212 and pristine SPEEK membrane, respectively. In addition, charge-discharge test over 150 times proves that the PS/DMF membrane possesses high stability and thus it is suitable for VRB application.

Original languageEnglish
Article number43593
JournalJournal of Applied Polymer Science
Volume133
Issue number26
DOIs
StatePublished - 10 Jul 2016
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 7 - Affordable and Clean Energy
    SDG 7 Affordable and Clean Energy

Keywords

  • polytetrafluoroethylene
  • sulfonated poly(ether ether ketone)
  • vanadium redox flow battery

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