# US 10,319,995 B2 · Silicon nanowire structure embedded in nickel silicide nanowires for lithium-based battery anodes

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- Number: US 10,319,995 B2
- Document ID: US10319995B2
- Status: Granted
- Kind: B2
- Application number: 14/543,626
- Filed: 2014-11-17
- Published: 2015-07-16
- Granted: 2019-06-11
- Earliest claimed: 2014-11-17
- Assignees: Hyundai Motor Company; Research & Business Foundation Sungkyunkwan University
- Applicants: Hyundai Motor Company; Research & Business Foundation Sungkyunkwan University
- Inventors: Kyo Min Shin; Sa Heum Kim; Hong Seok Min; Mihai Robert Zamfir; Je Mee Joe; Didier Pribat; Yeo Jin Lee
- Web page: https://patentgrep.com/patent/US10319995B2

## CPC

- H01M 4/366: {as layered products}
- C23C 16/24: Deposition of silicon only
- H01M 4/0428: {Chemical vapour deposition}
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/1395: of electrodes based on metals, Si or alloys
- H01M 4/386: {Silicon or alloys based on silicon}
- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 4/669: {Steels}
- H01M 10/052: Li-accumulators
- H01M 2004/027: {Negative electrodes}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present invention provides a silicon nanowire structure embedded in nickel silicide nanowires for lithium-based battery anodes and anodes including the same. In particular, a Si nanowire structure embedded in NiSix nanowires according to the present invention may provide a solution to a problem, such as disconnection of Si nanowires from a current collector shown when the Si nanowires are expanded by alloying with Li or contracted during the use of a battery, and the like, by flexibly embedding the Si nanowires in the NiSix nanowires.

## Claims

### Claim 1

A silicon (Si) nanowire structure embedded in nickel silicide (NiSix) nanowires comprising:
a substrate;
a nickel (Ni) thin film deposited on the substrate;
Si nanowires randomly distributed on the nickel (Ni) thin film; and
NiSix nanowires embedding the Si nanowires while being deposited on the Ni thin film,
wherein the NiSix nanowires provide elastic contact with respect to the Si nanowire, and have a structure which withstands the volume expansion of the Si nanowires,
wherein the NiSix nanowires are grown on the Si nanowires disposed on the Ni thin film,
wherein the Si nanowires and NiSix nanowires are solid,
wherein the NiSix nanowires cover at least a portion of the outside of the Si nanowire, and
wherein the substrate is a current collector of an anode.

### Claim 2 (depends on 1)

The Si nanowire structure embedded in NiSix nanowires of claim 1, wherein the substrate is a copper (Cu) substrate or a steel-use-stainless (SUS) substrate.

### Claim 3 (depends on 1)

An anode comprising the Si nanowire structure embedded in NiSix nanowires of claim 1.

### Claim 4 (depends on 1)

A lithium secondary battery comprising an anode comprising the Si nanowire structure embedded in NiSix nanowires of claim 1.

### Claim 5 (depends on 4)

The lithium secondary battery of claim 4, wherein the battery is used for a vehicle.