Novel siloxane polymers as polymer electrolytes for high energy density lithium batteries |
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| Authors: | Hooper Richard Lyons Leslie J Moline David A West Robert |
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| Institution: | (1) School of the Environment, University of Brighton, Cockcroft Building, Lewes Road, Brighton, BN2 4GJ, U.K.;(2) Department of Chemistry, Grinnell College, Grinnell, IA, 50112, U.S.A;(3) Organosilicon Research Center, Department of Chemistry, University of Wisconsin – Madison, 1101 University Avenue, Madison, WI, 53706, U.S.A |
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| Abstract: | A variety of disubstituted (double-comb) polysiloxane polymers have been prepared containing linear, branched, and cyclic oligoethyleneoxide units, –(OCH2CH2)n–, in the side chains and as part of the siloxane backbone. Copolymers, using mixtures of linear ethylene oxide side chains, were also synthesized. These polymers were doped with LiN(SO2CF3)2 (LiTFSI, 1) and conductivities of the polymer-salt complexes were determined as a function of temperature and doping level. The maximum conductivity of these polymers at 25 ° C was 2.99 ×10–4, for a copolymer containing equimolar amounts of side chains with n = 5 and 6. |
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| Keywords: | siloxanes polymer electrolytes lithium batteries conductive polymers |
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