Electronic connection in an all-solid state battery at the anode/electrolyte interface
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsLawrence G. Scanlon, William A Feld, Jacob W Lawson, Leah R Lucente
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Abstract
The present invention relates to a solid-state battery that is based on a phthalocyanine solid-state electrolyte/anode connection that is chemically obtained. Such chemical connection process yields a solid electrolyte interphase that connects the solid-state battery's phthalocyanine solid-state electrolyte and anode. Unlike other processes for forming solid-state electrolyte/anode connections, the present chemical process does not require that solid-state electrolyte be ductile and flow under high pressure.
Claims3
A process of making a solid state battery comprising connecting a cathode comprising a surface layer and an interior region, said interior region comprising a phthalocyanine solid-state electrolyte and said surface comprising a layer of phthalocyanine solid-state electrolyte;
- and an anode, said process comprising the steps of:
- a) contacting said cathode's surface layer of phthalocyanine solid-state electrolyte with a mixture of lithium bis(fluorosulfonyl) imide, dimethoxyethane, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether and fluoroethylene carbonate;
- b) allowing said mixture of lithium bis(fluorosulfonyl) imide, dimethoxyethane, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether and fluoroethylene carbonate on said cathode's surface layer of phthalocyanine solid-state electrolyte to dry at about 20° C. to about 25° C. for a time of from about 15 minutes to about 25 minutes;
- c) contacting said cathode's surface layer of phthalocyanine solid-state electrolyte with a mixture of lithium bis(fluorosulfonyl) imide, dimethoxyethane, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether and fluoroethylene carbonate a second time;
- d) contacting said cathode's surface layer of phthalocyanine solid-state electrolyte, said cathode's surface layer of phthalocyanine solid-state electrolyte comprising a coating comprising said mixture of lithium bis(fluorosulfonyl) imide, dimethoxyethane, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether and fluoroethylene carbonate, with said lithium metal anode to form a solid-state battery comprising a lithium metal anode, solid-state electrolyte, and lithiated iron phosphate cathode, said solid-state battery comprising a solid electrolyte interphase that connects said lithium anode and phthalocyanine solid-state electrolyte, said solid electrolyte interphase comprising lithium fluoride and an organic amorphous layer that are reaction products of said lithium bis(fluorosulfonyl) imide, dimethoxyethane, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether and fluoroethylene carbonate;
- and
- e) sealing said solid-state battery in a coin cell.
Dependencies are inferred from the claim text.