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A method of improving the conductivity of solid oxide fuel cell electrolyte

A solid oxide and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of extremely high production equipment requirements, unfavorable fuel cell commercialization, and increased battery preparation costs, and achieve the effect of improving electrical conductivity

Active Publication Date: 2022-05-17
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the commonly used methods to improve the conductivity of the electrolyte include: (1) thinning the electrolyte, that is, reducing the thickness of the electrolyte to 1-30 μm, but at this thickness, the requirements for the production equipment of the battery are extremely high, which virtually increases the battery life. The preparation cost is not conducive to the commercialization of fuel cells; (2) to develop new electrolyte materials, that is, to change the doping elements or Doping ratio, but this method often has little effect on the improvement of electrolyte conductivity

Method used

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  • A method of improving the conductivity of solid oxide fuel cell electrolyte
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  • A method of improving the conductivity of solid oxide fuel cell electrolyte

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Embodiment

[0057] In this embodiment, the fuel cell uses NCAL as the anode, Pt as the cathode, and GDC as the electrolyte. A single fuel cell with a structure of NCAL / GDC / Pt was prepared according to the above steps. The Pt electrode side used a nickel foam pad (13 mm in diameter) as a current collector and was sealed with silver glue. The NCAL electrode side used a nickel foam pad coated with NCAL. A sheet (13 mm in diameter) was used as a current collector. The single fuel cell is placed in the laboratory fuel cell performance test fixture and placed in a tube furnace, where the temperature of the furnace near the cell is 550 ° C; then gaseous fuel (air, H 2 ) and connected to the Princeton electrochemical workstation (VersaSTAT 3) to start the electrochemical performance test.

[0058] Before the battery performance test, pass H to the anode side of NCAL 2 Reduction, the passage time is 20min. Afterwards, during the performance test, air and H were respectively passed through the c...

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Abstract

The invention belongs to the technical field of fuel cell electrolytes, in particular to a method for improving the conductivity of solid oxide fuel cell electrolytes. The fuel cell in this method includes an anode, a cathode, and an electrolyte arranged between the anode and the cathode. The anode material is a lithium-containing oxide, and the electrolyte is GDC, YSZ, BCY, BZY, SSZ or LST. Access to H 2 , so that the lithium-containing oxide on the anode side is covered by H 2 Partial reduction generates LiOH, and the generated LiOH can enter the electrolyte to improve the conductivity of the electrolyte. The method provided by the invention significantly improves the conductivity of the electrolyte, and the preparation cost of the fuel cell is low, which is beneficial to realize the commercialization of the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cell electrolytes, in particular to a method for improving the conductivity of solid oxide fuel cell electrolytes. Background technique [0002] Solid oxide fuel cell (SOFC) is an all-solid-state energy conversion device that can directly convert chemical energy stored in fuel and oxidant into electrical energy. attracted the attention of many researchers. However, due to the high operating temperature of traditional fuel cells, their performance in terms of operating cost and stability is not very satisfactory. Therefore, in order to improve the stability of fuel cells and reduce their operating costs, the research direction of fuel cells has gradually shifted to low-temperature operation, which is also conducive to realizing the commercialization requirements of fuel cells. [0003] However, reducing the operating temperature of the fuel cell faces the problems of low electrolyte conductivity and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1253H01M8/126
CPCH01M8/1253H01M8/126H01M2008/1293Y02E60/50
Inventor 陈刚何杨张雪柏张琳琳杨迪
Owner NORTHEASTERN UNIV LIAONING