# US 10,374,228 B2 · Stabilized lithium metal powder for li-ion application composition

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- Number: US 10,374,228 B2
- Document ID: US10374228B2
- Status: Granted
- Kind: B2
- Application number: 16/195,963
- Filed: 2018-11-20
- Published: 2019-03-28
- Granted: 2019-08-06
- Earliest claimed: 2006-10-13
- Assignees: FMC Lithium USA Corp.
- Applicants: FMC Lithium USA Corp.
- Inventors: Marina Yakovleva; Yuan Gao; Kenneth Brian Fitch; B. Troy Dover; Prakash Thyaga Palepu; Jian-xin Li; Brian Anthony Christopher Carlin; Yangxing Li
- Web page: https://patentgrep.com/patent/US10374228B2

## CPC

- H01M 4/40: Alloys based on alkali metals
- B22F 1/00: Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F 1/102: Metallic powder coated with organic material
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/1315: containing halogen atoms, e.g. LiCoOxFy
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/366: {as layered products}
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 4/387: {Tin or alloys based on tin}
- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- B22F 1/108: {Mixtures obtained by warm mixing}
- B22F 2998/10: Processes characterised by the sequence of their steps
- B22F 2999/00: Aspects linked to processes or compositions used in powder metallurgy
- H01M 10/052: Li-accumulators
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention provides a lithium metal powder protected by a wax. The resulting lithium metal powder has improved stability and improved storage life.

## Claims

### Claim 1

An anode comprising a host material capable of absorbing or desorbing lithium in an electrochemical system and a stabilized lithium metal powder dispersed in the host material, wherein the stabilized lithium metal powder is coated with a wax, wherein the stabilized lithium metal powder has a mean diameter of from 10 μm to 200 μm in N-methyl-2-pyrrolidine or gamma butyrolactone, the wax is a continuous layer and has a thickness of 20 nm to 200 nm.

### Claim 2 (depends on 1)

An anode according to claim 1, wherein the wax is selected from the group consisting of natural waxes, synthetic waxes, petroleum waxes, and microcrystalline waxes.

### Claim 3 (depends on 1)

An anode according to claim 1, further comprising an inorganic coating.

### Claim 4 (depends on 3)

The anode of claim 3, wherein the inorganic coating is selected from the group consisting of Li2CO3, LiF, Li3PO4, SiO2, Li2SO4, LiAlO2, Li2TiO3, and LiNbO3.

### Claim 5 (depends on 1)

The anode of claim 1, wherein said host material comprises at least one material selected from the group consisting of carbonaceous materials, silicon, tin, tin oxides, composite tin alloys, transition metal oxides, lithium metal nitrides, graphite, carbon black, and lithium metal oxides.

### Claim 6 (depends on 1)

A battery incorporating the anode of claim 1.