The Broad Classification Of Solid Electrolytes

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1.3 Broad Classification of Solid Electrolytes:
The solid electrolytes are broadly classified based on the physical properties, microstructures and synthesis routes as mentioned below:
 Framework crystalline / single crystalline/ polycrystalline solid electrolytes
 Glassy / amorphous solid electrolytes
 Polymer electrolytes
 Composite solid electrolytes Further the Composite solid electrolytes can again be classified as
(i) Crystal-crystal composites
(ii) Crystal-glass composites
(iii) Glass-polymer composites and
(iv) Crystal-polymer composites [16]
These types of solid electrolytes can have either ordered or disordered phases. Framework crystalline materials are in ordered phase whereas the three remaining solid electrolytes are in disordered phase. The first three types of solid electrolytes are reviewed briefly while composite electrolytes are discussed extensively, as the present thesis mainly on these electrolytes.
1.3.1 Framework / single crystalline /polycrystalline solid electrolytes:
Framework crystalline …show more content…

Frame crystalline/polycrystalline solid electrolytes Conducting species Conductivity (S/cm) Temperature (oC) References α-AgI Ag+ 2.1 × 10-1 > 147 Tubandt & Lorenz, 1914
MAg4I5 (M = Rb, K, NH4) Ag+ ~2.1 × 10-1 22 Owens & Argue , 1967 Bradley & Greene, 1967
Ag7I4PO4 Ag+ 9.0 x 10-2 25 Takahashi, 1972
(1-x) MI: x [0.75 AgI: 0.25 AgCl] (M = Rb, K) Ag+ ~ 8.7 x 10-3 27 Agrawal & Chandra 2007 & 2008
Na-β-alumina Na+ 1.4 x 10-2 25 Kennedy, 1977
Na1.9Al0.3Ti1.7P2.4O12 Na+ 8.6 x 10-3 25 Wang & Huang, 1994
Na1.7Cr1.7Ti6.3O16 Na+ 1.0x10-2 200 Yashikado et al, 2000 β-LiTa3O8 Li+ 1.5x10-2 400 Reau et al, 1976
Li4SiO4: Li3PO4 Li+ 1.0x10-4 100 Huggins, 1977

Table 1.2: Some ion conducting glassy superionic materials along with conductivity values.
Ion conducting glasses Conducting species Conductivity (S/cm) Temperature (oC)

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