Low viscosity/high conductivity sodium haloaluminate electrolyte

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United States of America Patent

PATENT NO 9876253
SERIAL NO

14298302

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Abstract

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An additive that is added to the NaAlX4 electrolyte for use in a ZEBRA battery (or other similar battery). This additive has a moiety with a partial positive charge (δ+) that attracts the negative charge of the [AlX4]moiety and weakens the ionic bond between the Na+ and [AlX4]moieties, thereby freeing some Na+ ions to transport (move). By using a suitable NaAlX4 electrolyte additive, the battery may be operated at much lower temperatures than are typical of ZEBRA batteries (such as, for example, at temperatures between 150 and 200° C.). Additionally, the additive also lowers the viscosity of the electrolyte solution and improves sodium conductivity. Non-limiting examples of the additive SOCl2, SO2, dimethyl sulfoxide (DMSO, CH3SOCH3), CH3S(O)Cl, SO2Cl2. A further advantage of using this additive is that it allows the use of a NaSICON membrane in a ZEBRA-type battery at lower temperatures compared to a typical ZEBRA battery.

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Patent Owner(s)

Patent OwnerAddress
FIELD UPGRADING USA INCC/O GREENBERG TRAURIG LLP 1200 SEVENTEENTH STREET SUITE 2400 DENVER CO 80202

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bhavaraju, Sai West Jordan, US 96 2930
Robins, Mathew Saratoga Springs, US 12 96

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