Nanocomposite Network Polymer Gel-Electrolytes:
TiO₂- and Li₂TiO₃-Nanoparticle Effects
on Their Structure and Properties

O. V. Yarmolenko^a,z, A. V. Yudina^a, A. A. Marinin^b, A. V. Chernyak^a, V. I. Volkov^a,
N. I. Shuvalova^a, and A. F. Shestakov^a

^aInstitute of Problems of Chemical Physics, Russian Academy of Sciences,
pr. akad. Semenova 1, Chernogolovka, Moscow oblast, 142432 Russia

^bZAO Aviatsionnyi KonsaltingTEKHNO, ul. Yaroslavskaya 8/5, Moscow, Russia

Received July 11, 2014

Abstract—The effects of TiO₂- (~60 nm) and Li₂TiO₃- (~20 nm) nanoparticles on the conductivity, structure,
and mechanical strength of (polyether diacrylate–LiClO₄–ethylene carbonate)-based polymer gel-electrolytes
are studied. When the gel-electrolytes are synthesized with the TiO₂- and Li₂TiO₃-nanoparticles ultrasonic pre-
treatment, both polyether diacrylate and ethylene carbonate are partially decomposed in the solution; this is evi-
denced by the appearance of –CH₃-group signal at 1.2 ppm in ¹H-NMR-spectra, as well, as by the peak area
analysis. The gel-electrolyte matrix partial decomposition was shown not to affect the network polymer elec-
trolyte conductivity and mechanical properties. Analysis of NMR spectra for ⁷Li nuclei, taken with nanocom-
posite polymer electrolyte rotating under magic angle, revealed two Li⁺ ion environments: with the nanoparti-
cles and the polymer matrix. Upon the adding of TiO₂ nanoparticles (10 mass %) the polymer electrolyte con-
ductivity increased by order of magnitude (up to 1.8 10^–3 S/cm at 20C); upon the adding of Li₂TiO₃, by a
factor of 2 only (up to 7.0 10^–4 S/cm at 20C). The electrolyte-solution ultrasonic treatment increased the
films’ mechanical strength; the larger effect occurred with Li₂TiO₃ (the modulus of elasticity is 15 MPa).

Keywords: gel-electrolyte, polyester diacrylate, nanocomposite, TiO₂, Li₂TiO₃, conductivity, Li⁺ ion, NMR

10.1134/S1023193515050171

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