Mineral material electrolyte for low-temperature solid oxide fuel cell
A technology of solid oxides and mineral materials, applied in the direction of fuel cells, circuits, electrical components, etc., to achieve the effect of ensuring stable performance, excellent ion conductivity, and improving electrochemical performance
Active Publication Date: 2019-06-18
WUHAN UNIV OF TECH
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Problems solved by technology
However, once the operating temperature of SOFC is lowered, Ce 0.9 Gd 0.1 o 1.95 (GDC), etc. have been unable to meet the performance requirements of SOFC. Therefore, further development of new electrolyte materials with reliable performance and excellent electrochemical performance at low temperature is currently a hot issue in the process of low temperature SOFC.
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Embodiment 1
[0035] A mineral material electrolyte for a low-temperature solid oxide fuel cell, the preparation method of which comprises the steps of:
[0036] 1) Take natural hematite (HEM) in a crucible and calcinate it in an air atmosphere at 700°C for 2 hours; then mill the calcined hematite in a ball mill for 48 hours to make the particle diameter of the powder smaller (about 200 ~500nm), to obtain hematite powder with uniform fineness;
[0037] 2) Combine the obtained hematite powder with Ce 0.9 Gd 0.1 o 1.95 The powder is mixed according to the mass ratio of 1:1, and ball milled evenly to obtain the mixed powder;
[0038] 3) Take 2 g of the obtained mixed powder, place it in a cylindrical mold with a diameter of 26 mm, pressurize it evenly to 10 MPa under a press, release the pressure after holding the pressure for 1 minute, and obtain a circular green body after demoulding; finally place the green body In a high-temperature muffle furnace, sinter in air at 1250°C for 4 hours t...
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Abstract
The invention discloses a mineral material electrolyte for a low-temperature solid oxide fuel cell. The mineral material electrolyte is prepared by taking hematite and Ce0.9Gd0.1O1.95 powder as main raw materials. The scheme of the invention is the first time to propose a method for preparing the mineral material electrolyte by compounding natural hematite and GDC powder, the shortage of the electrochemical performance of the natural hematite and GDC can be simultaneously overcome, the improvement of the electrochemical performance of the obtained solid oxide fuel cell can be facilitated, andmoreover, the obtained composite electrolyte can make SOFC exhibit excellent electrochemical performance at low temperature, effectively broadens the applicable field of existing solid oxide fuel cells, and has important research and promotion value; and in addition, the mineral material electrolyte involves a simple synthesis process, has the advantages of low cost and high production efficiency,and is suitable for popularization and application.
Description
technical field [0001] The invention belongs to the technical field of solid oxide fuel cells, in particular to a low-cost mineral material electrolyte for low-temperature solid oxide fuel cells. Background technique [0002] In today's society, energy crisis and environmental pollution have become the focus of attention of countries all over the world. At present, the dominant fossil energy reserves are limited and non-renewable. At the same time, the combustion of fossil energy will emit a large amount of harmful gases, which is an important cause of environmental pollution such as the greenhouse effect and smog, and brings social development and human life. Serious harm. Therefore, it has become a major problem to be solved urgently to develop green, environmentally friendly and sustainable new energy, and to optimize the use mode and efficiency of fossil energy. [0003] Solid oxide fuel cell (SOFC) is an important energy conversion device, which utilizes chemical reac...
Claims
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IPC IPC(8): H01M8/1016
CPCY02E60/50Y02P70/50
Inventor 刘毅辉双婧雯杨号远何云斐杨胜兵
Owner WUHAN UNIV OF TECH