TY - CONF

T1 - Polymeric ionic liquids as separators for all-solid state thin-film electrochromic devices and Li batteries

AU - Shaplov, A. S.

AU - Ponkratov, D. O.

AU - Aubert, P. H.

AU - Lozinskaya, E. I.

AU - Plesse, C.

AU - Vlasov, P. S.

AU - Vidal, F.

AU - Morcrette, M.

AU - Armand, M.

AU - Vygodskii, Y. S.

N1 - Funding Information: The formation of a series of polymer films, representing semi-interpenetrating polymer networks (semi-IPNs) with chemically attached ionic groups, was studied. Such ionic semi-IPNs were developed using simple one-step process. The ionic network, formed by radical copolymerization of ionic liquid like monomer (N-[2-(2-(2-(methacryloyloxy)ethoxy)ethoxy)ethyl]-N-methylpyrrolidinium bis(fluorosulfonyl)imide) with poly(ethylene glycol)(di)methacrylates, acts as a solid polymer electrolyte, whereas nitrile butadiene rubber (NBR) ensures the reinforcement of mechanical properties. Semi-IPNs filled with 44 wt.% of N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide and 12 wt.% of lithium bis(trifluoromethylsulfonyl)imide demonstrate an ionic conductivity higher than 10-4 S cm-1 (25°C), while maintaining a tensile strength of 80 kPa and an elongation of 60 %. Preliminary battery tests have demonstrated that Li/LiFePO4 flexible cells with semi-IPN based electrolyte are capable to deliver a 77 mA h g-1 average specific capacity at 40°C during 75 charge/discharge cycles, thus making the films with semi-IPN architecture promising candidates for stretchable electronics [33]. ACKNOWLEDGEMENTS This work was supported by the Russian Foundation for Basic Research (no. 13-03-00343-a, 14-03-31953_mol_a and 14-29-04039_ofi_m) and by European Commission (FP7-PEOPLE-2012-IRSES, project no. 318873 «IONRUN»). Publisher Copyright: © 2015 International Committee on Composite Materials. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2015

Y1 - 2015

N2 - New well-defined, high molar mass (Mw = 3.8÷4.7×105 g/mol) methacrylic polymeric ionic liquids with oxyethylene side chains and bis(trifluoromethylsulfonyl)imide or tetracyanoborate anions were synthesized and demonstrated high ionic conductivities up to 10-5 S/cm (25oC). For the first time the all-polymer-based thin-film electrochromic devices (ECDs) have been constructed using these PILs and poly(3,4-ethylenedioxythiophene) (PEDOT) as ion conductor material and electrodes, respectively. The best electrodes were obtained by utilization of vapor phase polymerization of EDOT on ITO glass in the presence of ionic monomer and polyethyleneglycol dimethacrylate, followed by radical polymerization of the latters. The advantages of assembled symmetrical ECDs are: simplicity of preparation, fast switching times (3÷5 s), high coloration efficiency (up to 430 cm2/C at 620÷630 nm), and satisfactory optical contrast up to ΔT = 28.5 %, good performance in air and in vacuum. To gain the combination of high ionic conductivity and good mechanical properties (elasticity and toughness), a new kind of solid composite materials, namely, ionic semi-interpenetrating polymer networks (semi-IPNs) was suggested. Such innovative semi-IPN materials were prepared by radical copolymerization of 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 nitrilebutadiene rubber. Based on the filled ionic semi-IPN the thin film separator for the Li batteries was created (ionic conductivity 1.3×10-4 Scm-1 (25°C), tensile strength - 80 kPa, elongation at break - 60%). The assembled polymer accumulators demonstrated 75 cycles of charge/discharge at 40оС with an average specific capacity of 70 mА×h/g.

AB - New well-defined, high molar mass (Mw = 3.8÷4.7×105 g/mol) methacrylic polymeric ionic liquids with oxyethylene side chains and bis(trifluoromethylsulfonyl)imide or tetracyanoborate anions were synthesized and demonstrated high ionic conductivities up to 10-5 S/cm (25oC). For the first time the all-polymer-based thin-film electrochromic devices (ECDs) have been constructed using these PILs and poly(3,4-ethylenedioxythiophene) (PEDOT) as ion conductor material and electrodes, respectively. The best electrodes were obtained by utilization of vapor phase polymerization of EDOT on ITO glass in the presence of ionic monomer and polyethyleneglycol dimethacrylate, followed by radical polymerization of the latters. The advantages of assembled symmetrical ECDs are: simplicity of preparation, fast switching times (3÷5 s), high coloration efficiency (up to 430 cm2/C at 620÷630 nm), and satisfactory optical contrast up to ΔT = 28.5 %, good performance in air and in vacuum. To gain the combination of high ionic conductivity and good mechanical properties (elasticity and toughness), a new kind of solid composite materials, namely, ionic semi-interpenetrating polymer networks (semi-IPNs) was suggested. Such innovative semi-IPN materials were prepared by radical copolymerization of 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 nitrilebutadiene rubber. Based on the filled ionic semi-IPN the thin film separator for the Li batteries was created (ionic conductivity 1.3×10-4 Scm-1 (25°C), tensile strength - 80 kPa, elongation at break - 60%). The assembled polymer accumulators demonstrated 75 cycles of charge/discharge at 40оС with an average specific capacity of 70 mА×h/g.

KW - Conducting polymers

KW - Electrochromic devices

KW - High conductivity

KW - Ionic semi-interpenetrating polymer networks

KW - Li batteries

KW - Poly(ionic liquid)s

KW - Polyelectrolytes

KW - Smart windows

UR - http://www.scopus.com/inward/record.url?scp=85053107498&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85053107498

T2 - 20th International Conference on Composite Materials, ICCM 2015

Y2 - 19 July 2015 through 24 July 2015

ER -