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- W1978229674 abstract "Thermal behavior was examined using DSC and TG for the samples prepared by dissolving LiClO4 in several polyoxyethylene/polyethylenimine (PEO/PEI) blends (7/3–9.5/0.5 by repeat units) along with their lithium ion conductivity. Concerning the matrix polymers, while the pristine PEO and PEI began to thermally decompose at 185 and 230 °C, respectively, the (8/2) PEO/PEI blend had lost only 6.5% of its weight before 300 °C was reached. Dissolution of LiClO4 made the systems thermally even more robust: [(8/2) PEO/PEI]10–LiClO4 suffered practically no weight loss below 300 °C. So far [(8/2) PEO/PEI]10–LiClO4 has been our best-behaving SPE (σ=2.2×10−4 S cm−1 at 77 °C and 2.5×10−6 S cm−1 at 30 °C): it is less conductive than a previously reported PEO12–LiClO4 by a factor of 2.2 at 77 °C, but its conductivity drop due to the matrix crystallization below 65 °C is considerably milder and the conductivity at 30 °C was ca. 100 times higher than the plain PEO–LiClO4 systems. A significant effect of the residual methanol on the ionic conductivity of our [(8/2) PEO/PEI]10–LiClO4 samples was recognized, which necessitated our previously reported log σ vs. 1000/T curve to be corrected downward by ca. half an order of magnitude." @default.
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- W1978229674 date "2003-06-01" @default.
- W1978229674 modified "2023-09-27" @default.
- W1978229674 title "Improvement of room-temperature conductivity and thermal stability of PEO–LiClO4 systems by addition of a small proportion of polyethylenimine" @default.
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- W1978229674 doi "https://doi.org/10.1016/s0013-4686(03)00220-2" @default.
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