A Rechargeable Secondary Battery Having an Aluminum Salt Electrolyte.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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This invention provides a secondary battery containing a chloroaluminate molten salt electrolyte and a positive component capable of sodium or lithium intercalation. The preferred battery configuration incorporates a molten sodium negative separated from the chloroaluminate salt electrolyte by a solid separator such as a sodium - beta - alumina ceramic which possesses a high ionic conductivity for Na ions. Either a NaA1C14 fusible salt is preferred as the electrolyte component. The latter electrolyte is unique in intercalation batteries in general, since both Na and Li intercalation can occur simultaneously. The former electrolyte is limited to Na intercalation during the discharge reaction. TiS2 is a favored positive solid solution electrode, although there are other possible transition metal oxides, sulfides, and selenides which could serve the function.
- Inorganic Chemistry
- Electrochemical Energy Storage