Method for covering particles, especially a battery electrode material particles, and particles obtained with such method and a battery comprising such particle

Patent metadata

Field	Value
Publication number	US-9705125-B2
Application number	US-201514625442-A
Country	US
Kind code	B2
Filing date	Feb 18, 2015
Priority date	Dec 12, 2007
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A method for covering particles having a diameter of maximally 60 μm by means of atomic layer deposition, whereby said method comprises the step of fluidizing said particles in a fluidized bed reactor using a first reactant gas comprising a first reactant for substantially completely covering said particles with a monolayer of said first reactant.

First claim

What is claimed:

1. A method of providing coated particles, comprising coating one or more particles with a coating having a thickness of about 2 nm or less using an atomic layer deposition process, and obtaining the coated particles, wherein the atomic layer deposition process comprises sequentially exposing the particles to a plurality of reactant gases or vapors at an operating pressure of 0.5-2.0 bar, wherein the particles coated by the atomic layer deposition process are fluidized particles having a diameter of up to 60 μm.

2. The method according to claim 1 , wherein the atomic layer deposition process comprises an exposure of a plurality of reactant gases or vapors at least partially performed repeatedly.

3. The method according to claim 1 , wherein the coated particles are lithium containing particles.

4. The method according to claim 1 , wherein the coated particles comprise a lithium metal oxide or a lithium metal phosphate.

5. The method according to claim 1 , wherein the coated particles comprise one or more of LiMn 2 O 4 , LiCoO 2 , LiNiO 2 , LiFePO 4 , Li 4 Ti 5 O 12 , LiMg x Ni 0.5-x Mn 1.5 O 4 , and LiFe x Ti y Mn 2-x-y O 4 .

6. The method according to claim 1 , wherein the coated particles comprise a spinel structure.

7. The method according to claim 1 , wherein the particles comprise one or more of primary particles and hard aggregates of primary particles.

8. The method according to claim 1 , wherein the particles are obtained using an auto-ignition synthesis method.

9. The method according to claim 2 , wherein the exposure of the plurality of reactant gases or vapors is continuous.

10. The method according to claim 2 , wherein the exposure of the plurality of reactant gases or vapors is intermittent.

11. The method according to claim 2 , wherein the exposure of the plurality of reactant gases or vapors occurs at an operating pressure of 0.9-2.0 bar.

12. The method according to claim 1 , wherein the atomic layer deposition process comprises exposing the particles to a first reactant gas or vapor that adsorbs to and/or reacts with particle surfaces, wherein the first reactant gas or vapor is injected into a flowing carrier gas.

13. The method according to claim 12 , wherein the atomic layer deposition process subsequently comprises exposing the particles to a second reactant gas or vapor that adsorbs to and/or reacts with the particle surfaces, wherein the second reactant gas or vapor is injected into the flowing carrier gas.

14. The method according to claim 13 , wherein the exposure of the plurality of reactant gases or vapors subsequently injected into the flowing carrier gas is continuous.

15. The method according to claim 14 , wherein the continuous sequential exposure of reactant gases or vapors occurs at an operating pressure of 0.9-2.0 bar.

16. A method of providing coated particles, comprising coating a plurality of particles with a coating layer using an atomic layer deposition process, wherein the atomic layer deposition process comprises:
exposing the particles to a first reactant gas or vapor that adsorbs to and/or reacts with particle surfaces, at an operating pressure of 0.5-2.0 bar, wherein the first reactant gas or vapor is optionally injected into a flowing carrier gas, and
subsequently exposing the particles to a second reactant gas or vapor that adsorbs to and/or reacts with the particle surfaces, at an operating pressure of 0.5-2.0 bar, wherein the second reactant gas or vapor is optionally injected into the flowing carrier gas, and wherein the particles coated by the atomic layer deposition process are fluidized lithium-containing particles.

17. The method according to claim 1 , further comprising incorporating the coated particles into an electrode.

18. The method according to claim 17 , further comprising incorporating the electrode into a battery.

19. The method according to claim 16 , further comprising incorporating the coated particles into an electrode.

20. The method according to claim 19 , further comprising incorporating the electrode into a battery.

21. The method according to claim 16 , wherein the coating layer is an oxide layer.

22. The method according to claim 16 , wherein the coating layer is a metal oxide layer.

Assignees

• Univ Delft Tech

Inventors

• Kelder Erik Maria
• Van Ommen Jan Rudolf
• Nijenhuis John

Classifications

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M10/0525

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

• H01M4/1391

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

• H01M2004/028

  Positive electrodes · CPC title

• C23C16/442

  using fluidised bed process · CPC title