Electrical conductivity and structural studies of the fast ionic system 35(Cu_(1-x)Ag_xI)-32.5(Ag_2O)-32.5(CrO_3)

摘要

Over the last two decades many fast ion-conducting glasses having a variety of conducting species like Ag~+, Li~+, O~(2-) and Cu~+ have been investigated, because of their technological applications in solid state electro-chemical devices [1-5]. However, high ion conductivities of the order of 10~(-1) S cm~(-1) were realized only in the case of Ag~+ ion-conducting glasses [6]. Doped silver ion-conducting glasses such as AgI-Ag_2O-X where X = P_2O_5, MoO_4, AsO, CrO_4 ... etc. were earlier reported by Minami [7]. In the case of the present investigation, it is aimed to develop a series of Ag~+ ion conducting solid electrolytes by the combination of CuI-AgI solid solution and Ag_2O with CrO_3 as the glass former. Recently, the formation of composite superionic solids in the case of (Cu_(1-x)Ag_xI)-(Ag_2O)-(P_2O_5) and (Cu_(1-x)Ag_xI)-(Ag_2O)-(B_2O_3) system was identified in our laboratory [8, 9]. This paper describes the preparation and characterization of a new system 35(Cu_(1-x)Ag_xI)-32.5(Ag_2O)-32.5(CrO_3) where 0.05 ≤ x ≤ 0.25.