Methods for forming lithium manganese oxide layers

Patent metadata

Field	Value
Publication number	US-10374218-B2
Application number	US-201615339577-A
Country	US
Kind code	B2
Filing date	Oct 31, 2016
Priority date	Nov 2, 2015
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A method is provided for forming a porous, electrochemically active lithium manganese oxide layer on a substrate, the method comprising: depositing a porous manganese oxide layer on the substrate; providing a Li containing layer on the porous manganese oxide layer; and afterwards performing an annealing step at a temperature in the range between 200° C. and 400° C., thereby inducing a solid-state reaction between the porous manganese oxide layer and the Li containing layer. The method may further comprise, before depositing the porous manganese oxide layer: depositing a seed layer on the substrate. A method of the present disclosure may be used for forming electrode layers of lithium-ion batteries.

First claim

What is claimed is:

1. A method for forming a porous, electrochemically active lithium manganese oxide (Li x Mn y O z ) layer on a substrate, the method comprising:
depositing a porous manganese oxide layer on the substrate;
providing a Li containing layer on the porous manganese oxide layer; and
afterwards performing an annealing step at a temperature in the range between 200° C. and 400° C., thereby inducing a solid-state reaction between the porous manganese oxide layer and the Li containing layer.

2. The method according to claim 1 , wherein the lithium manganese oxide layer has a spinel structure.

3. The method according to claim 1 , wherein the lithium manganese oxide layer is a Li x Mn y O z layer with x in the range between 0 and 2, y=2 and z in the range between 1.8y and 2.2y.

4. The method according to claim 1 , wherein the porous manganese oxide layer is a porous MnO v O w layer with v=1 and win the range between 1.9 and 2.1.

5. The method according to claim 1 , wherein the porous manganese oxide layer has a porosity in the range between 40% and 60%.

6. The method according to claim 1 , wherein the porous manganese oxide layer comprises pores having a pore size in the range between 2 nm and 20 nm.

7. The method according to claim 1 , wherein providing the Li containing layer comprises providing a Li 2 CO 3 layer.

8. The method according to claim 1 , wherein the substrate is a non-planar substrate.

9. The method according to claim 8 wherein the substrate comprises a plurality of high aspect-ratio micro-pillars and/or a plurality of high aspect-ratio micro-trenches, each having an aspect ratio in the range of 20 to 250.

10. The method according to claim 1 , wherein the substrate comprises Al.

11. The method according to claim 1 , wherein depositing the porous manganese oxide layer on the substrate comprises electrochemically depositing the porous manganese oxide layer.

12. The method according to claim 11 , further comprising, before electrochemically depositing the porous manganese oxide layer depositing a seed layer on the substrate.

13. The method according to claim 12 , wherein depositing the seed layer comprises depositing a dense manganese oxide layer by means of a method different from electrochemical deposition.

14. The method according to claim 1 , wherein
the lithium manganese oxide layer is a Li x Mn y O z layer with x in the range between 0 and 2, y=2 and z in the range between 1.8y and 2.2y;
the porous manganese oxide layer is a porous MnO v O w layer with v=1 and w in the range between 1.9 and 2.1;
the porous manganese oxide layer has a porosity in the range between 40% and 60%; and
the porous manganese oxide layer comprises pores having a pore size in the range between 2 nm and 20 nm.

15. The method according to claim 14 , wherein the lithium manganese oxide layer has a spinel structure.

16. A method for fabricating a lithium-ion battery, wherein the method comprises forming a porous, electrochemically active lithium manganese oxide electrode layer on a substrate, using a method according to claim 1 .

17. The method according to claim 1 , wherein the porous, electrochemically active lithium manganese oxide layer is conformally provided on said substrate, the substrate not withstanding temperatures higher than 700° C.

18. A method for fabricating lithium-ion battery, wherein the method comprises forming a porous, electrochemically active lithium manganese oxide electrode layer on a substrate, using a method according to claim 17 .

19. The method according to claim 1 , wherein the annealing is performed in air or in an inert atmosphere.

20. The method according to claim 1 , wherein the annealing is performed in the absence of further deposition.

Assignees

• Imec Vzw
• Univ Leuven Kath

Inventors

• Labyedh Nouha
• Timmermans Marina Yurievna
• Vereecken Philippe

Classifications

• H01M4/664

  Ceramic materials · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/045 Primary

  Electrochemical coating; Electrochemical impregnation · CPC title

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title