Single-sheet electrolyte solid oxide fuel battery pack

A technology of solid oxide and fuel cell stacks, applied in the direction of solid electrolyte fuel cells, fuel cells, fuel cell components, etc., can solve the problem of increased processing costs, very high flatness requirements for single cells and bipolar plates, design and processing High requirements and other issues, to achieve the effect of high output voltage and power density

Inactive Publication Date: 2014-07-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional planar SOFC stack uses a monolithic cell as a unit, that is, the cathode and anode are prepared on both sides of the monolithic electrolyte, and only a single cell is formed. Theoretically, the maximum voltage of the monolithic cell is 1V. This structure makes Limited in high voltage applications
When assembling it into a battery pack, it is necessary to connect the single cells in series through the bipolar plate current collector, but the use of the bipolar plate makes the sealing effect not good
At the same time, the use of bipolar plates will also bring a series of problems: (1) The bipolar plate material is generally made of metal or ceramics. In order to achieve a certain mechanical strength, it needs sufficient thickness, which causes the bipolar plate in the SOFC stack. (2) The bipolar plate needs to effectively collect the charge of each single cell, and has very high requirements on the flatness of the single cell and the bipolar plate, which increases the processing cost; (3) The bipolar plate also bears The role of isolating oxidant gas and fuel gas requires high requirements for the design and processing of its air passage, so that the cost of bipolar plates can account for 75% of the SOFC stack
At the same time, due to the large size of the single cell, the current travel path is too long, which brings difficulties in charge collection for solid oxide fuel cells.

Method used

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  • Single-sheet electrolyte solid oxide fuel battery pack
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  • Single-sheet electrolyte solid oxide fuel battery pack

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1 Rectangular monolithic electrolyte SOFC battery pack:

[0028] Such as figure 1 As shown, a rectangular monolithic electrolyte SOFC battery pack consists of an electrolyte sheet 1 , a cathode membrane 2 , an anode membrane 3 and a connecting body 4 . The shape of the electrolyte sheet 1 is rectangular, and the preferred size is 30mm×20mm. The electrolyte material of the electrolyte sheet 1 is yttrium stabilized zirconia (YSZ), which is prepared by tape casting. The shape of the cathode film 2 is rectangular, which can be determined according to the size of the electrolyte sheet 1 and the number of single cells contained in the battery pack. For example, a battery pack with 3 single cells connected in series should be prepared on the electrolyte sheet 1 of 30 mm × 20 mm. The area of ​​the cathode membrane 2 of the battery can be designed to be 14mm×6mm, the distance between adjacent cathode membranes 2 is 3mm, and the distance between the cathode membrane ...

Embodiment 2

[0036] Example 2: Circular Monolithic Electrolyte SOFC Battery Pack

[0037] Such as image 3 As shown, the main components of a circular monolithic electrolyte SOFC battery pack include an electrolyte sheet 1, a cathode membrane 2, an anode membrane 3, a connecting hole 4 and a connecting body. The shape of the electrolyte sheet is circular, and the size is Φ18×0.4mm. The electrolyte material is yttrium-stabilized zirconia (YSZ), and a single-layer cast film is prepared by tape-casting method, and 13 layers of cast film are superimposed and pressed together by isostatic pressing to obtain an electrolyte green strip. Taking the shrinkage rate (25%) into consideration, the electrolyte green body is cut and punched, and the diameter of the circular green body is Φ24mm.

[0038] The shape of the cathode film 2 is circular, the diameter is Φ6mm, the distance between adjacent cathode films 2 is 2mm, and the distance between the cathode film 2 and the electrolyte 1 is also 2mm. T...

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Abstract

A disclosed single-sheet electrolyte solid oxide fuel battery pack comprises electrolyte sheets, cathode films, anode films and connectors; one surface of each electrolyte sheet is provided with multiple cathode films at intervals, the other surface of each electrolyte sheet is provided with multiple anode films at intervals, and the cathode films and the anode films have same shape and size and are arranged oppositely; each electrolyte sheet is provided with a connection hole between two adjacent cathode films or anode films, the connector penetrates the connection hole, one end of the connector is connected with the cathode film on one surface of the electrolyte sheet, and the other end of the connector is connected with the anode film on the other surface of the electrolyte sheet, so that serial connection is formed; and the connector employs metal silver or a lanthanum chromate ceramic material. Multi-section serial-connection solid oxide fuel battery pack is prepared by employing the single-sheet electrolyte. The battery pack employs electrolyte support, so that the stability of the battery performances is facilitated; and through the ingenious design to the connection holes and the connectors, the battery pack has the advantages of high output voltage and power density, good sealing property and current collection convenience.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a solid oxide fuel cell group, in particular to a single-chip electrolyte solid oxide fuel cell group. Background technique [0002] A fuel cell is a new type of power generation device that efficiently converts the chemical energy of fuel into electrical energy, and is an ideal distributed power generation technology. Among various fuel cells, solid oxide fuel cell (SOFC) technology is a high-tech developed in recent years. High-quality waste heat can be used to drive gas turbines to further improve power generation efficiency and realize the advantages of combined heat and power (CHP). It is expected to be widely used in power stations, distributed power sources, etc., and is recognized as a green energy technology in the 21st century. [0003] SOFC is a ceramic fuel cell consisting of a dense electrolyte capable of conducting oxygen ions and porous electrodes with electrocatalytic properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10H01M4/88H01M8/0297H01M8/1246
CPCH01M8/0271H01M8/12H01M2008/1293Y02E60/50
Inventor 刘江张莉刘燕苑莉莉
Owner SOUTH CHINA UNIV OF TECH
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