US 8,475,963 B2Granted

Lithium microbattery and fabrication method thereof

AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives

InventorsSami Oukassi, Raphael Salot, Nicolas Dunoyer, Steve Martin

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Abstract

The microbattery is formed by a stack of solid thin layers on a substrate which, starting from the substrate, successively comprises a first electrode, a solid electrolyte and a second electrode/current collector assembly. A first surface and a second surface of the electrolyte are respectively in contact with a main surface of the first electrode and a main surface of the second electrode/current collector assembly. The dimensions of the main surface of the first electrode are smaller than the dimensions of the main surface of said assembly, and the dimensions of the first surface of the solid electrolyte are smaller than the dimensions of the second surface of the solid electrolyte. The solid electrolyte is furthermore not in contact with the substrate.

Claims23

Dependent claims

A lithium microbattery comprising a stack of solid thin layers on a substrate, said stack successively comprising, starting from the substrate, a first electrode, a solid electrolyte, and a second electrode/current collector assembly formed by at least one thin layer,

wherein:
a first surface and a second surface of the electrolyte is in contact respectively with a main surface of the first electrode and a main surface of the second electrode/current collector assembly, said main surfaces facing one another;
dimensions of the main surface of the first electrode are smaller than dimensions of the main surface of said assembly;
dimensions of the first surface of the solid electrolyte are smaller than dimensions of the second surface of the solid electrolyte;
the solid electrolyte is not in contact with the substrate;
and
the solid electrolyte has a trapezoid shape, in cross-section, with a small base and a large base respectively constituting the first surface and the second surface of the electrolyte.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/203,796Filed 4 Mar 2010
Priority: FR 09 0121716 Mar 2009
Published: US 2011/0311883 A122 Dec 2011
Granted: 2 Jul 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H01M 6/18
Cells with non-aqueous electrolyte: with solid electrolyte
H01M 6/186
With oxides, hydroxides or oxysalts as solid electrolytes: only oxysalts-containing solid electrolytes
H01M 6/187
With solid electrolyte: solid electrolyte characterised by the form
H01M 6/40
Primary cells; Manufacture thereof: printed batteries , e.g. thin film batteries