New Devices Using Mixed (Ion and Electron) Conductors
Original Publication Date: 1996-Oct-01
Included in the Prior Art Database: 2005-Apr-01
Disclosed is a novel use for mixed conductors. Mixed conductors are conductors which contain several mobile species which are in general of electronic (electrons or holes) or ionic nature (cation and anions). The movement of these latter species is either achieved by thermal activation, a concentration gradient (diffusion) or the application of an electric field (migration). Although this definition is not very strict, a conductor is called mixed from the moment that the ionic contribution to the conductivity equals roughly '10' sup-3. times the electronic contribution, while for large ionic conductivities it is called an ionic conductor. There is ample use of such ion conductors in the fields of sensors, energy storage (batteries), and energy production (fuel cells).