Electrochemical Studies on Single Crystalline CuCl Solid Electrolyte

Abstract

The d‐c polarization technique, relaxation technique, and the charge transfer technique have been applied to cuprous chloride single crystals for the determinations of electronic conductivity, mobility of electronic carriers, and the double layer capacitance at normalCuCl/normalgraphite interface. A method to separate the electronic charge transfer is presented. It has been shown that the redistribution of electronic carriers within the solid electrolyte in which the concentrations of electronic carriers exponentially increase with the applied potential may make a significant contribution to transient measurements involving a polarization cell. Further, ideal polarization kinetics were observed for the normalCuCl/normalgraphite interface in the temperature range of 200°–300°C, because the electronic charge transfer was made negligible by selecting the proper parameters such as thickness of the electrolyte and the magnitude of the applied potential step normalΔEfalse(E1‐E2false) as well as the values of the applied potentials, E1 and E2 , on the polarization cell.

Evaluation of the chemical, electronic and optoelectronic properties of γ-CuCl thin films and their fabrication on Si substrates

“…The non-Ohmic response of the electrical characteristics is considered to be due to the bulk properties of CuCl and not interfacial effects. CuCl is a well-known mixed ionic-electronic semiconductor with ptype conductivity [42,43]. Following from general suggestions by Hebb [44], theoretical analysis [41] and experimental verification by Wagner and Wagner [43], an exponential current-voltage relation can be expected for a p-type mixed conduction material if the ionic current is suppressed by using blocking electrode(s) (Au).…”

Determination of Thermodynamic and Transport Properties of Non-Stoichiometric Oxides

“…The Hebb-Wagner polarization technique has been developed either for the determination of electron and hole conductivity in ionic conductors [Hebb, 1952;Joshi & Wagner, 1975;Wagner, 1957] or for the measurement of ionic conductivity in MIECs [Riess, 1996;Wiemhöfer et al, 2002]. Basically, the method consists in using a reversible electrode and blocking electrodes to suppress the predominant charge carrier and thus enable measurement of the minority species.…”

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

“…The other one may contain the constituent which is used to fix the electrochemical potentials of the electrolyte at that side of the cell, a reversible electrode. Thus, for cuprous halides, Wagner and Wagner (24) and recently Joshi and Wagner (25) have used a carbon anode and a copper cathode. However, for the ternary system, it is necessary to fix the electrochemical potential of two constituents of the electrolyte.…”