Sulfonimide-Containing Triblock Copolymers for Improved Conductivity and Mechanical Performance

Chainika Jangu, Alice M. Savage, Zhiyang Zhang, Alison R. Schultz, Louis A. Madsen, Frederick L. Beyer, Timothy Edward Long*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

Ion-containing block copolymers continue to attract significant interest as conducting membranes in energy storage devices. Reversible addition-fragmentation chain transfer (RAFT) polymerization enables the synthesis of well-defined ionomeric A-BC-A triblock copolymers, featuring a microphase-separated morphology and a combination of excellent mechanical properties and high ion transport. The soft central "BC" block is composed of poly(4-styrenesulfonyl(trifluoromethylsulfonyl)imide) (poly(Sty-Tf2N)) with -SO2-N--SO2-CF3 anionic groups associated with a mobile lithium cation and low-Tg di(ethylene glycol)methyl ether methacrylate (DEGMEMA) units. External polystyrene A blocks provide mechanical strength with nanoscale morphology even at high ion content. Electrochemical impedance spectroscopy (EIS) and pulse-field-gradient (PFG) NMR spectroscopy have clarified the ion transport properties of these ionomeric A-BC-A triblock copolymers. Results confirmed that well-defined ionomeric A-BC-A triblock copolymers combine improved ion-transport properties with mechanical stability with significant potential for application in energy storage devices.

Original languageEnglish
Pages (from-to)4520-4528
Number of pages9
JournalMacromolecules
Volume48
Issue number13
DOIs
Publication statusPublished - 2015 Jul 14
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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