# US 10,312,512 B2 · Cathode of three-dimensional lithium secondary battery and method of fabricating the same

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- Number: US 10,312,512 B2
- Document ID: US10312512B2
- Status: Granted
- Kind: B2
- Application number: 15/168,582
- Filed: 2016-05-31
- Published: 2017-03-23
- Granted: 2019-06-04
- Earliest claimed: 2015-09-21
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Hojung Yang; Hwiyeol Park; Kyunghoon Cho; Kyounghwan Kim; Seunghoon Nam; Huisu Jeong; Jinseok Heo
- Web page: https://patentgrep.com/patent/US10312512B2

## CPC

- 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
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- 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 10/052: Li-accumulators
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/028: {Positive 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
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A cathode of a three-dimensional lithium secondary is defined by a sintered body including a cathode active material, in which a thickness of the sintered body is in a range of about 5 μm to about 30 μm, and an electrode density of the sintered body is in a range of about 3.7 g/cc to about 4.6 g/cc. The cathode active material may include a lithium cobalt oxide.

## Claims

### Claim 1

A cathode of a three-dimensional lithium secondary battery, wherein
the cathode is defined by a sintered body comprising a cathode active material,
a thickness of the sintered body is in a range of about 5 μm to about 30 μm, and
an electrode density of the sintered body is in a range of about 3.7 g/cc to about 4.6 g/cc,
wherein the cathode is disposed on a cathode collector of the three-dimensional lithium secondary battery to be perpendicular to the cathode collector.

### Claim 2 (depends on 1)

The cathode of the three-dimensional lithium secondary battery of claim 1, wherein the cathode active material comprises a plurality of elliptical or circular grains which is irregularly stacked when viewed in a side cross-sectional view of the cathode.

### Claim 3 (depends on 1)

The cathode of a three-dimensional lithium secondary battery of claim 1, wherein the electrode density of the sintered body is in a range of about 4.0 g/cc to about 4.6 g/cc.

### Claim 4 (depends on 1)

The cathode of the three-dimensional lithium secondary battery of claim 1, wherein the cathode active material comprises a lithium transition metal oxide.

### Claim 5 (depends on 4)

The cathode of the three-dimensional lithium secondary battery of claim 4, wherein the cathode active material comprises a lithium cobalt oxide.

### Claim 6 (depends on 1)

The cathode of the three-dimensional lithium secondary battery of claim 1, wherein the cathode comprises an inner collector and cathode layers, which are respectively disposed on opposite sides of the inner collector.