The solid electrolyte system RbCu4Cl3(I2-xClx), 0 ≤ x ≤ 0.40

Nag, K. ; Geller, S. (1981) The solid electrolyte system RbCu4Cl3(I2-xClx), 0 ≤ x ≤ 0.40 Journal of the Electrochemical Society, 128 (12). pp. 2670-2675. ISSN 0013-4651

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The stoichiometric solid electrolyte, RbCu3Cl3I2, can be converted, bycold-work, to a new low symmetry phase with the probable compositionRbCu4Cl3(I1.96Cl0.04) (and very small amounts of CuI and probably,Rb2Cu3Cl5). The new phase has a crystal structure which appears to berelated to that of the cubic phase. It transforms rapidly to the cubic phasewith formula RbCu4Cl3(I1.96Cl0.04) at temperatures above 75°C. The newphase is stable in a very narrow temperature range, almost surely not widerthan 0°-35°C. It has a conductivity of 1.5 × 10-4 Ω-1 cm-1 at 298 K. StoichiometricRbCu4Cl3I2 is thermodynamically stable in the narrow temperaturerange 200° ± 15°C. The solid solution range RbCu4Cl3(I2-xClx) 0.00 ≤ x ≤ 0.40 ± 0.01 has been confirmed. For 0.02 ≤ x ≤ 0.40, the materials appearto be stable from at least 78 K to their preparation temperatures which dependon x. None of these can be made to convert to the new phase; that isto say, the only established route to the new phase is through cold-working ofthe stoichiometric phase.

Item Type:Article
Source:Copyright of this article belongs to The Electrochemical Society.
Keywords:Solid Electrolytes; Rubidium Compounds; Copper Compounds; Iodine Compounds; Chlorine Compounds; Thermal Stability
ID Code:87776
Deposited On:21 Mar 2012 09:42
Last Modified:21 Mar 2012 09:42

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