US 9,093,707 B2Granted

MultiLayer solid electrolyte for lithium thin film batteries

AssigneeAlliance for Sustainable Energy, LLC

InventorsSe-Hee Lee, C. Edwin Tracy, John Roland Pitts, Ping Liu

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Abstract

A lithium metal thin-film battery composite structure is provided that includes a combination of a thin, stable, solid electrolyte layer [18] such as Lipon, designed in use to be in contact with a lithium metal anode layer; and a rapid-deposit solid electrolyte layer [16] such as LiAlF4 in contact with the thin, stable, solid electrolyte layer [18]. Batteries made up of or containing these structures are more efficient to produce than other lithium metal batteries that use only a single solid electrolyte. They are also more resistant to stress and strain than batteries made using layers of only the stable, solid electrolyte materials. Furthermore, lithium anode batteries as disclosed herein are useful as rechargeable batteries.

Claims19

Dependent claims

A rechargeable lithium battery device comprising:

an anode current collector comprising a metal material selected from copper, nickel, chrome ferrous alloy, a refractory metal, or stainless steel, the metal material being substantially inert toward a lithium metal material;
an anode overlaying the anode current collector, and the anode being electrically coupled to the current collector and comprising lithium metal material;
a first electrolyte layer overlaying the anode consisting of Li2S, Li2O, or combinations thereof, the first electrolyte layer being substantially stable toward lithium metal material, the first electrolyte layer being characterized by a first deposition rate and a thickness of 10-100 nm;
a second electrolyte layer in direct contact with the first electrolyte layer and comprising at least one of lithium nitride, lithium fluoride, or lithium aluminum fluoride, the second electrolyte layer being characterized by a second deposition rate;
a cathode overlaying the second electrolyte layer;
and
a cathode current collector overlaying the cathode;
wherein the first electrolyte layer and the second electrolyte layer are characterized by a total thickness of less than 20 um.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/816,730Filed 11 Jun 2007
Published: US 2010/0285372 A111 Nov 2010
Granted: 28 Jul 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H01M 6/40
Primary cells; Manufacture thereof: printed batteries , e.g. thin film batteries
H01M 6/185
With solid electrolyte: with oxides, hydroxides or oxysalts as solid electrolytes
H01M 6/187
With solid electrolyte: solid electrolyte characterised by the form
H01M 6/20
With solid electrolyte: working at high temperature