A series of double-comb, disubstituted polysiloxane polymers have been prepared containing oligoethylene oxide units, CH 3 (OCH 2 CH 2 ) n (CH 2 ) 3 −, in the side chains. These polymers were doped with LiN(SO 2 CF 3 ) 2 (LiTFSI, 1 ), and conductivities of the polymer-salt complexes were determined as a function of temperature and doping level. Conductivities increase with n up to n = 6 and then decrease. The maximum conductivity of the polymer with n = 6 at 25 °C was 4.5 × 10 -4, the highest value yet recorded for a lithium-doped polymer electrolyte.
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Hooper et al. (2001) studied this question.