# US 2017/0288227 A1 · Rechargeable lithium battery

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- Number: US 2017/0288227 A1
- Document ID: US20170288227A1
- Status: Published application
- Kind: A1
- Application number: 15/623,993
- Filed: 2017-06-15
- Published: 2017-10-05
- Earliest claimed: 2010-11-25
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Ji-Hyun KIM
- Web page: https://patentgrep.com/patent/US20170288227A1

## CPC

- H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 4/136: Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
- H01M 4/624: {Electric conductive fillers}
- H01M 4/626: {Metals}
- H01M 4/625: {Carbon or graphite}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Disclosed is an positive active material for a rechargeable lithium battery that includes an olivine-type composite oxide; and a metal or an alloy thereof adhered to a surface of the olivine-type composite oxide, wherein the metal or the alloy is selected from the group consisting of germanium (Ge), zinc (Zn), gallium (Ga), and a combination thereof.

## Claims

### Claim 1

A rechargeable lithium battery comprising:
a positive electrode comprising an olivine-type composite oxide; and a metal adhered to a surface of the olivine-type composite oxide, wherein the metal is selected from the group consisting of germanium (Ge), zinc (Zn), gallium (Ga), and a combination thereof;
a negative electrode comprising a negative active material; and
an electrolyte.

### Claim 2 (depends on 1)

The rechargeable lithium battery of claim 1, wherein the olivine-type composite oxide is represented by the following Chemical Formula 1:
LixMyM′zXO4-wAw [Chemical Formula 1]
wherein, in Chemical Formula 1,
M and M′ are independently selected from the group consisting of iron (Fe), aluminum (Al), boron (B), cobalt (Co), chromium (Cr), copper (Cu), gallium (Ga), germanium (Ge), hafnium (Hf), magnesium (Mg), manganese (Mn), molybdenum (Mo), niobium (Nb), nickel (Ni), tin (Sn), titanium (Ti), vanadium (V), zinc (Zn), zirconium (Zr), and a combination thereof,
X is selected from the group consisting of phosphorus (P), arsenic (As), bismuth (Bi), molybdenum (Mo), antimony (Sb), and a combination thereof,
A is selected from the group consisting of fluorine (F), sulfur (S), and a combination thereof, and
0<x≦1.3, 0<y≦1, 0<z≦1, 0<x+y+z≦2, and 0≦w≦0.5.

### Claim 3 (depends on 1)

The rechargeable lithium battery of claim 1, wherein the positive active material further comprises a carbon coating layer on the surface of the positive active material.

### Claim 4 (depends on 3)

The rechargeable lithium battery of claim 3, wherein the carbon coating layer comprises at least one selected from the group consisting of carbon nanotube, carbon nanorod, carbon nanowire, denka black, ketjen black, and a combination thereof.