High Temperature Batteries with a Solid Sulphate Electrolyte

✍ Scribed by B. Heed; A. Lundén

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 114 KB
• Volume: 10
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(83)80010-x

✦ Synopsis

Many sulphate mixtures are suitable as electrolytes for high temperature all-solid batteries, and it is possible to use easily available metals such as magnesium, calcium or zinc as the anode. We have previously shown that not only the theoretical energy density, but also the obtained power density, can be high for cells where divalent cations are added to cubic phases of LizSO,, or LiNaS04 [ 1 -51, which have a very high electrical conductivity. We have also reported on cells where divalent sulphates have been added to hexagonal Na,S04, a phase for which the conductivity can be strongly enhanced by introducing other cations [5 -71. We are now taking up a third possibility, namely, where a divalent sulphate, such as CaS04, MgS04 or ZnS04, is the main constituent.

LizSO was chosen as the dopant, since the phase diagrams LizSO,-CaS04

and LizSO,-MgSO, have been determined by Ljungmark [4,8] and Li,SO,-ZnSO, by Schroeder [2 -4,9]. The cells were prepared and tested according to the procedure used for the two other types of cells [ 1 -51. In Table the results for some cells with