Preparation method of nano electrolyte material for mesothermal solid oxide fuel cell

A technology of solid oxide and electrolyte materials, which is applied in the field of preparation of nano-electrolyte materials, can solve the problems of low ionic conductivity and high preparation temperature in the middle temperature region, and achieve improved oxygen vacancy density, simple operation, and increased particle surface activity and reactivity. Effect

Inactive Publication Date: 2013-04-24
HEILONGJIANG UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the existing nano-electrolyte materials used for intermediate-temperature solid oxide fuel cells have low ion conductivity in the intermediate temperature region, are not suitable for working under intermediate temperature conditions, and the existing oxygen ion conductor electrolyte materials have high preparation temperature problems , the invention provides a method for preparing a nano-electrolyte material for a medium-temperature solid oxide fuel cell

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  • Preparation method of nano electrolyte material for mesothermal solid oxide fuel cell
  • Preparation method of nano electrolyte material for mesothermal solid oxide fuel cell
  • Preparation method of nano electrolyte material for mesothermal solid oxide fuel cell

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specific Embodiment approach 1

[0017] Specific Embodiment 1: This embodiment is a nano-electrolyte material for medium-temperature solid oxide fuel cells, which is a cerium oxide-based oxygen-ion conductive electrolyte nano-powder co-doped with rare earth element ions and cobalt ions, and its chemical formula is Ce (1-x-y) Re x co y o 2-δ , where x:y=4~20:1, x+y=0.21~0.25, δ=0.10~0.12, Re is a rare earth element.

[0018] The nano-electrolyte material used in the medium-temperature solid oxide fuel cell in this embodiment is a single fluorite structure compound with relatively high crystallinity.

[0019]The nano-electrolyte material in this embodiment is a coral-like particle assembled and assembled from wheat ear-shaped nanoparticles.

[0020] In the temperature range of 500-700°C, the nano-electrolyte material of this embodiment has a high ion conductivity, up to 0.11S cm -1 , so as to obtain a general-purpose high-activity and high-long-term stability nano-electrolyte material for solid oxide fuel c...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the rare earth element ion is Nd 3+ 、Sm 3+ 、Gd 3+ 、Eu 3+ or Pr 3+ . Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is the nano-electrolyte material used in medium temperature solid oxide fuel cells, which is a cerium oxide-based oxygen ion conductive material co-doped with neodymium rare earth element ions and cobalt ions. Electrolyte nanopowder, chemical formula is Ce (1-x-y) Nd x co y o 2-δ , where x:y=4~10:1, x+y=0.22~0.25, δ=0.10~0.12. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a preparation method of a nano electrolyte material for a mesothermal solid oxide fuel cell, and relates to a preparation method of a nano electrolyte material for a solid oxide fuel cell. By the invention, the problems that the ionic conductivity of a mesothermal region of the conventional electrolyte material for the mesothermal solid oxide fuel cell is low and the preparation temperature of the conventional oxyen ion conductor electrolyte material is higher can be solved. The method comprises steps, including: weighing CeO2, rare-earth element nitrate and cobalt nitrate, grinding and mixing uniformly, adding mixed inorganic alkali, heating, washing and drying. Within the temperature of 500 to 700 DEG C, the ionic conductivity is high and reaches 0.047Scm<-1> at most; due to doping of Co3<+>, the conduction performance of the electrolyte material is enhanced and the ionic conductivity is increased, and the electrochemical performance of the CeO2 electrolyte doped with the single rare-earth Nd3<+> ion is improved.

Description

technical field [0001] The invention relates to a preparation method of a nano-electrolyte material for a solid oxide fuel cell. Background technique [0002] Solid oxide fuel cell is an energy device that works under high temperature conditions, and its energy utilization efficiency is as high as about 80%. It is the preferred alternative energy source for thermal power stations, gas turbines and automobiles. The operating temperature of traditional solid oxide fuel cells usually reaches 1000°C, which will bring a series of problems to fuel cell technology: such as aging of materials, interdiffusion between components, etc. The development of intermediate temperature solid oxide fuel cells has become one of the hot research directions. Traditional solid oxide fuel cell electrolyte materials (ZrO 2 ) 1-x (Y 2 o 3 ) x The lower oxygen ion conductivity below 1000°C is no longer suitable for intermediate temperature solid oxide fuel cells. The development of electrolyte ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/10B82Y30/00H01M8/126
CPCY02E60/50
Inventor 夏天赵辉李强
Owner HEILONGJIANG UNIV
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