# US 8,465,796 B2 · Method of manufacturing unit cell of solid oxide fuel cell using decalcomania process

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,465,796 B2
- Document ID: US8465796B2
- Status: Granted
- Kind: B2
- Application number: 12/963,258
- Filed: 2010-12-08
- Published: 2011-06-09
- Granted: 2013-06-18
- Earliest claimed: 2009-12-09
- Assignees: Korea Institute of Ceramic Engineering and Technology
- Applicants: Byung Hyun Choi; Mi Jung Jee; Seong Tae Park; Dae Jin Lee; Mi Jai Lee; Yuong Jin Kwon
- Inventors: Byung Hyun Choi; Mi Jung Jee; Seong Tae Park; Dae Jin Lee; Mi Jai Lee; Yuong Jin Kwon
- Web page: https://patentgrep.com/patent/US8465796B2

## CPC

- H01M 4/8835: {Screen printing}
- H01M 4/8814: {Temporary supports, e.g. decal}
- H01M 4/8885: {Sintering or firing}
- H01M 8/1213: characterised by the electrode/electrolyte combination or the supporting material
- H01M 8/1286: Fuel cells applied on a support, e.g. miniature fuel cells deposited on silica supports
- H01M 2008/1293: {Fuel cells with solid oxide electrolytes}
- Y02E 60/50: Fuel cells
- 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

A method of manufacturing a unit cell of a solid oxide fuel cell using a decalcomania process, in which an anode, electrolyte, cathode and interconnect are deposited on a substrate using the decalcomania process when the unit cell of the solid oxide fuel cell having a variety of shapes, such as a planar type, a horizontal pipe type, a tubular type, a segmented type, and the like, is manufactured. In manufacture of solid oxide fuel cells having a variety of shapes according to lamination and arrangement of unit cells, the components of each unit cell, such as the anode, the cathode, the electrolyte, the interconnect, and the like, may be deposited in a desired shape using the decalcomania process through deposition or coating, so that the components of the unit cell having a large scale or a complicated structure can be deposited without limit in size and shape, the thickness of the components of the unit cell can be easily controlled depending on the number of stacked transfer paper sheets, and a coating film can be formed on a substrate at a lower cost.

## Claims

### Claim 1

A method of manufacturing a unit cell of a solid oxide fuel cell using a decalcomania process, comprising:
preparing pastes by mixing an epoxy-based binder with powders for components of the unit cell including an anode, cathode, electrolyte and interconnect;
screen-printing the pastes on a transfer paper sheet; and
drying the transfer paper sheet on which the pastes are screen-printed, separating the anode, the cathode, the electrolyte, and the interconnect from the transfer paper in distilled water, stacking the anode, the cathode, the electrolyte and the interconnect on a substrate, followed by drying and sintering the anode, the cathode, the electrolyte, and the interconnect,
wherein the substrate is formed by mixing aluminum oxide, magnesium carbonate and activated carbon, drying the mixture, adding a binder, a release agent and a plasticizer to the dried mixture, followed by mixing, ripening, and extrusion molding.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the screen-printing comprises repeating paste transfer to deposit the pastes in a desired thickness in order to control a deposition thickness of each of the anode, the cathode, the electrolyte, and the interconnect, the repeating paste transfer comprising repeatedly drying and coating the anode, the cathode, the electrolyte, and the interconnect after the screen-printing.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the preparing pastes comprises the powders for each of the anode, the cathode, the electrolyte and the interconnect with the epoxy-based binder at a ratio of 1:0.5 to 1:2.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the screen-printing forms a coating layer using an epoxy-based transfer coating solution.