Lithium iodide-based solid electrolytes

Add time:08/13/2019    Source:sciencedirect.com

Mixtures of anhydrous lithium iodide and lithium hydroxide monohydrate exhibit conductivity transitions in the region of 170°C and 100°C. At the lower temperature transition, increases of two to three orders of magnitude are observed in mixtures containing as little as 1/80 by weight of LiOH·H2O. Stable conductivities of about 10−1 ohm−1cm−1 are attained at 250°C and both transitions are, with some hysteresis, reversible. With alumina additions, however, cooling specimens from just above the lower transition leads to Arrhenius-type behaviour with activation energies in the range 0.4 to 0.5 ev. Stable room temperature conductivities in the region of 5.10−5 ohm−1cm−1 have been achieved. These results are discussed in terms of a supercooled liquid phase.

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