New solid electrolyte: CsCu<SUB>4</SUB>Cl<SUB>3</SUB>I<SUB>2</SUB>
- Geller, S.
- Ray, A. K.
- Fardi, H. Z.
- Nag, K.
DOIAbstract
The solid electrolyte α-CsCu4Cl3I2 is thermodynamically stable above 431 K and to at least 505 K. It is isostructural with RbCu4Cl3I2. At 431 K it has a conductivity of 0.76Ω-1 cm-1, at 419 K the conductivity is 0.72Ω-1 cm-1 and extrapolation to 298 K gives 0.29Ω-1 cm-1. When corrected for deviation of bulk from x-ray density, the expected values are 0.84, 0.80, and 0.35Ω-1 cm-1, respectively. Its activation enthalpy of motion is 0.112 eV. There are two first-order phase transitions: β-α at 431 K and γ-β at 418 K; both are very sluggish. The a phase does not reconvert to the β phase; it returns to the γ phase below ~418 K. At 298 K the conductivity of the γ phase is 5.3×10-6 &...
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