Lithium battery current collector comprising conductive pillared structures on a substrate

Patent metadata

Field	Value
Publication number	US-10818927-B2
Application number	US-201616062345-A
Country	US
Kind code	B2
Filing date	Dec 15, 2016
Priority date	Dec 16, 2015
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A method of manufacturing a Lithium battery with a substrate current collector formed of pillars on a substrate face, wherein the method comprises: forming elongate and aligned structures forming electrically conductive pillars on the substrate face with upstanding pillar walls; wherein the pillars are formed with a first electrode, a solid state electrolyte layer provided on the first electrode; and a second electrode layer, wherein the pillars are dimensioned in such a way that adjacent pillars are merged and a topstrate current collector is formed of complementary interspace structures between the merged pillars.

First claim

The invention claimed is:

1. A lithium battery with a substrate current collector formed of electrically conductive pillars ( 11 ) on a substrate face producing elongate and aligned structures on the substrate face with upstanding pillar walls; wherein the electrically conductive pillars are provided with a first electrode layer ( 14 ), a solid state electrolyte layer ( 13 ) provided on the first electrode; and a second electrode layer ( 12 ), forming a coated pillar ( 110 ), wherein second electrode layers on adjacent coated pillars merge in an overlap region (O) so that a part of the second electrode layer is shared between adjacent coated pillars ( 110 ); and a topstrate current collector ( 220 ) comprising: an electrically conductive top layer covering the pillar structure, and electrically conductive interspace structures formed in interspace regions (S 1 ) between the coated pillars, wherein the electrically conductive interspace structure is formed from one or more of:
a conformal layer of a conductive material with a thickness below 100 nm deposited on the second electrode layer and a conductive polymer filling the interspace regions up to 50%, and
a conductive material filling the interspace regions.

2. The lithium battery according to claim 1 , wherein the high-aspect ratio structure comprises electrically conductive pillars having a radius of curvature larger than 50 nanometer.

3. The lithium battery according to claim 2 , wherein the electrically conductive pillars are higher than 10 micrometer.

4. The lithium battery according to claim 1 , wherein the substrate is a metal foil having both faces forming a high-aspect ratio structure.

5. The lithium battery according to claim 1 , having a plurality of current collectors, that are stacked in parallel or stacked in series.

6. The lithium battery according to claim 1 , wherein the metal substrate is stacked on an organic foil.

Assignees

• TNO

Inventors

• Haverkate Lucas Augustinus
• Unnikrishnan Sandeep
• Hermes Dorothee Christine

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/04 Primary

  Processes of manufacture in general · CPC title