Patent ID: 11967694
Assignee: I-TEN
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 12:
13. A method of manufacturing a battery comprising a porous ceramic electrode, the method comprising the steps of:
(1) providing a colloidal suspension comprising aggregates or agglomerates of nanoparticles of at least one cathode material with an average primary diameter D50 less than or equal to 80 nm, wherein a distribution of the average primary diameter D50 is a monodispersed distribution,
(2) providing a colloidal suspension comprising aggregates or agglomerates of nanoparticles of at least one anode material with an average primary diameter D50 less than or equal to 80 nm, wherein a distribution of the average primary diameter D50 is a monodispersed distribution,
(3) providing at least two flat conducting substrates, said conducting substrates can be used as current collectors of the battery, wherein the substrates have a melting point above 600° C.,
(4) depositing at least one layer of a cathode and/or anode, by dip-coating, by ink-jet, by doctor blade, by roll coating, by curtain coating or by electrophoresis, from said suspension of nanoparticles of material provided in step (1), or in step (2), on to said substrate provided in step (3),
(5) drying the layer thus obtained in the step (4),
(6) optionally depositing by atomic layer deposition (ALD) a layer of electrically-insulating material on and inside pores of the layer of cathode, and/or of anode in step (5),
(7) depositing a porous film of: a) an electrically-insulating material, b) an ion-conducting material, or c) an electrically-insulating ion-conducting material, from a colloidal suspension of nanoparticles of this aggregated or agglomerated material of average primary diameter D50 less than or equal to 50 nm and of an average diameter D50 of about 100 nm on the layer of the cathode or anode obtained in step (5) and/or step (6),
(8) drying the layer thus obtained in the step (7),
(9) realizing a stack comprising an alternating succession of layers of cathode and/or anode,
(10) hot pressing the layers of anode and cathode obtained in step (9) in such a way as to juxtapose the films obtained in step (8) on to the layers of anode and/or cathode, to obtain an assembled stack,
(11) impregnating the assembled stack obtained in step (10) by phase carrying lithium ions leading to an impregnated structure.