# US 7,744,023 B2 · Method for preparing black phosphorus or black phosphorus-carbon composite, lithium rechargeable battery comprising the prepared black phosphorus or black phosphorus-carbon composite and method for using the rechargeable battery

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- Number: US 7,744,023 B2
- Document ID: US7744023B2
- Status: Granted
- Kind: B2
- Application number: 11/835,710
- Filed: 2007-08-08
- Published: 2008-02-14
- Granted: 2010-06-29
- Earliest claimed: 2006-08-08
- Assignees: Seoul National University Industry Foundation
- Inventors: Cheol-Min Park; Hun-Joon Shon
- Web page: https://patentgrep.com/patent/US7744023B2

## CPC

- H01M 4/136: Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
- C01B 25/02: Preparation of phosphorus
- H01M 4/1397: of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
- H01M 4/58: of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/1393: of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- 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
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed is black phosphorus or black phosphorus-carbon composite, which is very suitable for an anode material of lithium rechargeable battery. The black phosphorus or black phosphorus-carbon composite is prepared by using high energy ball-milling, which is easy and efficient way in transforming amorphous red phosphorus into orthorhombic black phosphorus at ambient temperature and pressure.

## Claims

### Claim 1

A method for preparing black phosphorus comprising:
providing amorphous red phosphorus among the allotropes of phosphorus; and
high energy ball-milling the red phosphorus so as to transform the red phosphorus into the crystalline black phosphorus.

### Claim 2

A method for preparing a black phosphorus-carbon composite comprising:
mixing amorphous red phosphorus among the allotropes of phosphorus with carbon-based powder; and
high energy ball-milling the mixture so as to transform the mixture into a composite of the crystalline black phosphorus and carbon.

### Claim 3 (depends on 2)

The method according to claim 2, wherein the red phosphorus is at least 20 wt % of the mixture, and the carbon-based powder comprises up to 80 wt % of the mixture.