Trivalent ion conducting solid electrolytes

A trivalent ion conduction in solids was realized with Sc-2(WO4)(3)-type st ructure by the consideration of the stability and size of mobile trivalent ions and a structure to reduce the electrostatic interaction between the fr amework and the mobile ionic species as much as possible. Among the tungsta tes and the molybdates with the Sc-2(WO4)(3)-type structure, Sc-2(WO4)(3) a nd Sc-2(MoO4)(3) were found to hold the most suitable lattice size for triv alent ion migration in the individual series. By the de electrolysis and EP MA measurements, the mobile species was clearly identified to be trivalent ions in the Sc-2(WO4)(3)-type structure, (C) 2000 Elsevier Science B.V. All rights reserved.