Sulfonimide-Containing Triblock Copolymers for Improved Conductivity and Mechanical Performance

Sulfonimide-Containing Triblock Copolymers for Improved Conductivity and Mechanical Performance

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-separa...

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Veröffentlicht in:Macromolecules 2015-07, Vol.48 (13), p.4520-4528
Hauptverfasser: Jangu, Chainika, Savage, Alice M, Zhang, Zhiyang, Schultz, Alison R, Madsen, Louis A, Beyer, Frederick L, Long, Timothy E
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container_end_page 4528
container_issue 13
container_start_page 4520
container_title Macromolecules
container_volume 48
creator Jangu, Chainika
Savage, Alice M
Zhang, Zhiyang
Schultz, Alison R
Madsen, Louis A
Beyer, Frederick L
Long, Timothy E
description 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-T g 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.
doi_str_mv 10.1021/acs.macromol.5b01009
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title Sulfonimide-Containing Triblock Copolymers for Improved Conductivity and Mechanical Performance
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