# US 7,608,332 B2 · Cathode material particle comprising of plurality of cores of coated grains

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- Number: US 7,608,332 B2
- Document ID: US7608332B2
- Status: Granted
- Kind: B2
- Application number: 12/287,851
- Filed: 2008-10-10
- Published: 2009-02-26
- Granted: 2009-10-27
- Earliest claimed: 2004-06-14
- Assignees: Industrial Technology Research Institute
- Inventors: Mao-Huang Liu; Jin-Ming Chen; Tzu-Hwa Cheng
- Web page: https://patentgrep.com/patent/US7608332B2

## CPC

- H01M 4/049: {Manufacturing of an active layer by chemical means}
- C04B 35/62805: {Oxide ceramics}
- C04B 35/6281: {Alkaline earth metal oxides}
- C04B 35/62813: {Alumina or aluminates}
- C04B 35/62821: {Titanium oxide}
- C04B 35/62897: {Coatings characterised by their thickness}
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/366: {as layered products}
- 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 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
- C04B 2235/3203: Lithium oxide or oxide-forming salts thereof
- C04B 2235/3262: Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
- C04B 2235/3275: Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite
- C04B 2235/3279: Nickel oxides, nickalates, or oxide-forming salts thereof
- C04B 2235/5436: micrometer sized, i.e. from 1 to 100 micron
- C04B 2235/5445: submicron sized, i.e. from 0,1 to 1 micron
- H01M 4/02: Electrodes composed of, or comprising, active material
- H01M 10/052: Li-accumulators
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- Y10T 428/2991: Coated
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A cathode material particle comprising a plurality of cathode material cores and each cathode material core having plurality of grains and each grain being uniformly covered with a nano-metal oxide layer, wherein a thickness of the nano-metal oxide layer is 1 nm to 100 nm. The cathode material has excellent safety (good thermal stability), high-capacity, good cycleability and high-rate charging or discharging capability.

## Claims

### Claim 1

A cathode material particle comprising a plurality of cathode material cores and each cathode material core having plurality of grains and each grain being uniformly covered with a nano-metal oxide layer, wherein a thickness of the nano-metal oxide layer is from 1 nm to 100 nm.

### Claim 2 (depends on 1)

The cathode material particle as claimed in claim 1, wherein the nano-metal oxide layer contains magnesium.

### Claim 3 (depends on 1)

The cathode material particle as claimed in claim 1, wherein the nano-metal oxide layer contains strontium.

### Claim 4 (depends on 1)

The cathode material particle as claimed in claim 1, wherein the nano-metal oxide layer contains manganese.

### Claim 5 (depends on 1)

The cathode material particle as claimed in claim 1, wherein the nano-metal oxide layer contains titanium.

### Claim 6 (depends on 1)

The cathode material particle as claimed in claim 1, wherein the nano-metal oxide layer contains aluminum.

### Claim 7 (depends on 1)

The cathode material particle as claimed in claim 1, wherein the nano-metal oxide layer contains gallium.

### Claim 8 (depends on 1)

The cathode material particle as claimed in claim 1, wherein a particle size of the cathode material particle is from about 1 μm to 20 μm.

### Claim 9 (depends on 1)

The cathode material particle as claimed in claim 1, wherein a particle size of each cathode material core is from about 100 nm to 2 μm.

### Claim 10 (depends on 1)

The cathode material particle as claimed in claim 1, wherein a grain size of the grain is from about 10 nm to 300 nm.

### Claim 11 (depends on 1)

The cathode material particle as claimed in claim 1, wherein the cathode material core is made of material selected from the group consisting of lithium-cobalt-nickel oxide, lithium-cobalt oxide and lithium-manganese oxide.

### Claim 12 (depends on 11)

The cathode material particle as claimed in claim 11, wherein the nano-metal oxide layer contains magnesium.

### Claim 13 (depends on 11)

The cathode material particle as claimed in claim 11, wherein the nano-metal oxide layer contains strontium.

### Claim 14 (depends on 11)

The cathode material particle as claimed in claim 11, wherein the nano-metal oxide layer contains manganese.

### Claim 15 (depends on 11)

The cathode material particle as claimed in claim 11, wherein the nano-metal oxide layer contains titanium.

### Claim 16 (depends on 11)

The cathode material particle as claimed in claim 11, wherein the nano-metal oxide layer contains aluminum.

### Claim 17 (depends on 11)

The cathode material particle as claimed in claim 11, wherein the nano-metal oxide layer contains gallium.