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Issue 5, 2015
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Ionic semi-interpenetrating networks as a new approach for highly conductive and stretchable polymer materials

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Abstract

The synthesis and characterization of ionically conductive polymer films with high stretchability and good elasticity based on ionic semi-interpenetrating polymer networks (semi-IPNs) are discussed. Such innovative semi-IPN materials were prepared by radical copolymerization of an ionic monomer, namely, (N-[2-(2-(2-(methacryloyloxy)ethoxy)ethoxy)ethyl]-N-methylpyrrolidinium bis(fluorosulfonyl)imide) with poly(ethylene glycol)(di)methacrylates in the presence of the dissolved nitrile butadiene rubber, ionic liquid and lithium salt, using a simple one-step process. The suggested approach allows for simultaneous imparting of high ionic conductivity (1.3 × 10−4 S cm−1 at 25 °C) and excellent mechanical properties (tensile strength up to 80 kPa, elongation up to 60%) to a single polymer material. Ionic semi-IPNs, possessing unusual “Emmentaler cheese” like structure, exhibit a wide electrochemical stability window (4.9 V) and acceptable time-stable interfacial properties in contact with metallic lithium. Preliminary battery tests have shown that Li/LiFePO4 solid-state cells are capable to deliver a 77 mA h g−1 average specific capacity at 40 °C during 75 charge/discharge cycles.

Graphical abstract: Ionic semi-interpenetrating networks as a new approach for highly conductive and stretchable polymer materials

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Article information


Submitted
30 Oct 2014
Accepted
18 Nov 2014
First published
21 Nov 2014

J. Mater. Chem. A, 2015,3, 2188-2198
Article type
Paper
Author version available

Ionic semi-interpenetrating networks as a new approach for highly conductive and stretchable polymer materials

A. S. Shaplov, D. O. Ponkratov, P. S. Vlasov, E. I. Lozinskaya, L. V. Gumileva, C. Surcin, M. Morcrette, M. Armand, P. Aubert, F. Vidal and Y. S. Vygodskii, J. Mater. Chem. A, 2015, 3, 2188
DOI: 10.1039/C4TA05833J

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