Composite oxide, sintering body, solid electrolyte and manufacturing method thereof

A technology of composite oxide and solid electrolyte, which is applied in the field of solid electrolyte and its manufacture, composite oxide, and sintered body. It can solve the problems of reduced electrolyte stability, reduced output power, and obstacles to the practical use of solid electrolyte materials, and achieves high ionic strength. The effect of electrical conductivity and good reduction resistance

Inactive Publication Date: 2010-12-01
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] As mentioned above, due to the reducing properties of cerium oxide in a high-temperature reducing atmosphere, the output power is...

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  • Composite oxide, sintering body, solid electrolyte and manufacturing method thereof
  • Composite oxide, sintering body, solid electrolyte and manufacturing method thereof
  • Composite oxide, sintering body, solid electrolyte and manufacturing method thereof

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Embodiment Construction

[0063] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0064] In the present invention, "composite oxide" refers to cerium oxide (CeO 2 ) is doped with 1 or 2 kinds of rare earth elements. In cerium oxide, trivalent rare earth elements are solid-dissolved in the cerium oxide crystal lattice to partially replace tetravalent cerium (Ce) atoms to form lattice oxygen defects, thereby obtaining a composite oxide powder with oxygen ion conductivity. The average crystal grain diameter in the composite oxide powder of the present invention may be 5 to 50 nm. Using this composite oxide powder, a so...

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Abstract

The invention discloses a composite oxide shown in the following chemical formula: Ce1-x(LnA1-yLnBy)xO2-x/2, wherein LnA and LnB are different rare earth elements which are respectively selected from a group comprising the elements of Sm, Gd, Pr, Nd, Y, Sc, Yb, La, Dy and Ho, x is greater than 0 and less than or equal to 0.2, and y is greater than 0 and less than or equal to 0.5. The invention provides a manufacturing method of a solid electrolyte which has high ionic conductivity and reduction resistance in a lower temperature range. The invention further discloses a sintering body and a solid electrolyte which are formed by the composite oxide and a manufacturing method of the composite oxide. According to the invention, the solid electrolyte formed by the composite oxide has high ionic conductivity and reduction resistance at low temperature.

Description

technical field [0001] The invention relates to a solid electrolyte material in the fields of fuel cells and automobile exhaust gas sensors, in particular to a composite oxide, a sintered body, a solid electrolyte and a manufacturing method thereof. Background technique [0002] Fuel cells use the electrochemical reaction of hydrogen and oxygen to obtain electrical energy. Theoretically, the substance produced along with power generation is only water. Therefore, it is a clean power generation system that hardly imposes a burden on the global environment. [0003] The electrolyte materials used in fuel cells mainly include solid polymer type (PEFC for short), phosphate type (PAFC for short), molten carbonate type (MCFC for short), and solid oxide type (SOFC for short). Among them, SOFC uses ion-conducting metal oxides as electrolytes. [0004] Yttrium-stabilized zirconia solid electrolytes (abbreviated as YSZ) or similar conductive oxides are known as solid electrolytes use...

Claims

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Application Information

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IPC IPC(8): H01M8/10G01N27/407H01M8/126
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 潘伟李彬刘巍刘红芹川井将司
Owner TSINGHUA UNIV
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