Tsuneo Matsui

Investigations on a High Conductivity Solid Electrolyte System, RbCl + CuCl

Solid electrolytes with high copper ionic conductivity and low electronic hole conductivity were found in the RbCl + CuCl system. The highest conductivity of RbCu/sub 3/Cl/sub 4/ (75 mole percent (m/o) CuCl) was 2.25 x 10/sup -3/ (..cap omega..-cm)/sup -1/ at 25/sup 0/C. The conductivity was measured as functions of temperature and of composition. X-ray patterns and thermal analyses indicate that the material is a new compound and not a mixture of the constituents. 6 figures, 2 tables.

High Conductivity Cuprous Halide‐Metal Halide Systems

The a-c electrical conductivity was measured for the systems CuI + CdI/sub 2/, CuCl + CdCl/sub 2/, CuI + KI, CuI + RbI, and CuCl + RbCl, and the results are discussed in relation to phase diagrams. New, highly conducting materials at room temperature were surveyed for the system, RbCl + CuCl. 4 figures, 5 tables.

Electrical Properties of LiFe[sub 5]O[sub 8]

Lithium compounds have been considered for use as solid-state electrolytes and as electrode materials in batteries involving Li as one reactant. Ac and dc conductivity measurements were made on LiFe/sub 5/O/sub 8/ as a function of temperature (22 to 850/sup 0/C) and oxygen partial pressure. Diffraction patterns yielded lattice constants. ..cap alpha.. and ..beta.. phase transition was found to occur at 740 +- 5/sup 0/C. 1 figure, 2 tables. (RWR)

Study on the electrical properties and phase transitions of lithium ferrite by a complex admittance method

Abstract The electrical properties of lithium ferrite (LiFeO2) with rock-salt structure have been studied as a function of temperature (380–700°C) and oxygen partial pressure ( 2.1 × 10 4 −5.3 Pa) using AC conductivity measurements. Data analysis in the complex admittance plane revealed the presence of three phase transitions and mixed (electronic and ionic) conduction in LiFeO2. The nature of the charge carriers depends on temperature and oxygen partial pressure. The defect structure of α-LiFeO2 at high temperature has been discussed from the oxygen partial pressure dependence of electronic conductivity.