ISSN 1070-4272, Russian Journal of Applied Chemistry, 2014, Vol. 87, No. 12, pp. 1868−1871. © Pleiades Publishing, Ltd., 2014.
Original Russian Text © G.P. Dukhanin, A.N. Gaidadin, I.A. Novakov, 2014, published in Zhurnal Prikladnoi Khimii, 2014, Vol. 87, No. 12, pp. 1790−1794.
PROCESSES AND EQUIPMENT
OF CHEMICAL INDUSTRY
A Solid Polymeric Electrolyte
Based on the Poly(propylene carbonate)–Lithium
G. P. Dukhanin, A. N. Gaidadin, and I. A. Novakov
Volgograd State Technical University, pr. Lenina 28. Volgograd, 400131 Russia
Received January 13, 2015
Abstract—Composites based on the poly(propylene carbonate)–lithium perchlorate system were prepared. Inter-
action in the poly(propylene carbonate)–lithium perchlorate system in a wide composition interval was studied
by IR spectroscopy, differential thermal analysis, and X-ray diffraction. The speciﬁ c electrical conductivity of the
obtained composites was measured. In the series of studied aliphatic polycarbonates, the speciﬁ c conductivity of
the composites increases with an increase in the degree of branching of the polymer.
The development of new high-performance solid
lithium-conducting electrolytes is a promising direction
of polymeric materials science [1–4]. Replacement
of a liquid nonaqueous electrolyte by a polymeric
electrolyte will allow the development of fully solid-
state electrochemical cell (ECC). The most widely
used materials of the polymeric matrix are polyesters,
polyamides, polysulfones, etc. [3, 5]. The use of many
polymers in solid electrolytes is restricted by insufﬁ cient
conductivity of lithium-containing composites at
room temperature and elevated temperatures, and also
instability of their electrochemical characteristics.
Therefore, study of polymers containing electron-donor
groups that are capable to interact with the lithium salt,
promoting its dissociation and ensuring lithium ion
transport, is a topical problem.
Aliphatic polycarbonates, e.g., poly(ethylene
carbonate) (PEC) and poly(propylene carbonate) (PPC),
containing complex polar groups –О–СО–О– in the
backbone, are promising polymers, which are potentially
capable of interaction with the lithium salt due to features
of their chemical structure.
Previously  we studied the interaction in the PEC–
lithium perchlorate system and determined the speciﬁ c
electrical conductivity of composites based on this sys-
tem. The results of the research show that solid polymeric
electrolytes (SPEs) based on poly(ethylene carbonate)
exhibit conducting properties similar to those of a well-
studied electrolyte, unmodiﬁ ed poly(ethylene oxide).
Proceeding the research in this ﬁ eld, we examined
in this work polymeric electrolyte systems based
on poly(propylene carbonate) matrices with lithium
IR spectroscopic, differential thermal, X-ray dif-
fraction, and electrochemical impedance methods
were applied for research. Poly(propylene carbonate)
produced by AOOT Kaustik (Volgograd) was used as
polymeric matrix. This polymer granules were white,
soluble in acetonitrile, methylene chloride, and acetone.
The molecular mass of PPC was 18580; ether units were
Methods of preparation of the polymer, the lithium salt,
and the solution and preparation of ﬁ lms by castingwere
described previously . The films obtained were
transparent and elastic; their thickness was 40–60 μm.
For our studies, we prepared samples of composites
with the following molar ratios of poly(propylene