Application of perovskite type LSCM material in solid oxide electrolytic cell
A solid oxide, perovskite-type technology, applied in electrolytic components, electrolytic processes, electrolytic organic production, etc., can solve problems such as affecting the long-term stability of batteries, not improving the anti-carbon deposition of fuel electrode materials, and poor catalytic ability. Achieve obvious anti-carbon deposition characteristics, obvious performance advantages, and good catalytic activity.
Pending Publication Date: 2022-08-05
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0003] Chinese patent CN 105130426 B uses strontium titanate-based fuel electrode material with high temperature chemical stability to replace Ni-based cermet fuel electrode material, but only improves the structural stability of the material itself at high temperature, and does not improve the anti-carbon deposition of fuel electrode material Ability
Chinese patent CN 102731090 A discloses a La and Cr co-doped strontium titanate fuel electrode material, which has high ionic conductivity and can be directly used in hydrocarbon solid oxide fuel cells, but uses strontium titanate as the matrix When used as the fuel electrode material of solid oxide electrolytic cell, the catalytic ability to carbon dioxide is relatively poor, and the polarization resistance is about 50Ω [Ma Zheng. Preparation and co-electrolytic performance research of new ceramic fuel electrode for solid oxide electrolytic cell[D]. Nanjing : Nanjing University of Science and Technology, 2021:63-64], which affects the long-term stability of batteries, so it is necessary to find a fuel electrode material with good stability in reducing atmosphere and excellent resistance to sulfur and carbon deposition
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Embodiment 1
[0025] (1) Perovskite La 0.75 Sr 0.25 Cr 0.5 Mn0.5O 3-δ The preparation of the material adopts the sol-gel method, and the specific steps are as follows:
[0026] According to the molar ratio of strontium: lanthanum: chromium: manganese = 1:3:2:2, the medicine was weighed first. 3 ) 3 ·6H 2 O, Sr (NO 3 ) 2 , Cr(NO 3 ) 3 ·H 2 O and Mn (NO 3 ) 2 ·4H 2 O is added to the aqueous solution of citric acid monohydrate (molar ratio with metal ions is 1:1.5), stirred with an oil bath at 80 ° C, and the pH of the solution is adjusted with ammonia water during the stirring process. clarify. Continue to stir continuously in the oil bath, the liquid is turbid at first, then slowly turns into a light yellow solution, and finally slowly turns into a sol by stirring in a water bath, and then ages to a gel with increasingly poor fluidity. At this time, the beaker was taken out and dried at 150°C in a drying oven. The gel finally turned into a solid mixed with organic matter, and ...
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Abstract
The invention discloses an application of a perovskite type LSCM material in a solid oxide electrolytic tank. The perovskite type LSCM material disclosed by the invention is LaxSr < 1-x > Cr < 0.5 > Mn < 0.5 > O < 3-delta >, wherein x < lt > is greater than or equal to 0.5; according to the present invention, 1, the material is used as the fuel electrode material to be applied to the solid oxide electrolytic cell, has excellent oxygen ion and electron mixed conduction characteristics, can maintain the structural stability for a long time in the oxidation or reduction state and the electrolytic atmosphere of water vapor and carbon dioxide, and has excellent co-electrolysis characteristics and carbon deposition resistance in the CO2 and H2O co-electrolysis process;
Description
technical field [0001] The invention belongs to the field of solid oxide electrolytic cells, and relates to a perovskite type La x Sr 1-x Cr 0.5 Mn 0.5 O 3-δ Application of (LSCM) materials in solid oxide electrolysis cells. Background technique [0002] Solid oxide electrolysis cells (SOEC) have attracted worldwide attention as a device that converts electrical energy into chemical energy continuously and efficiently without capacity limitation. The efficiency of electrolytic hydrogen production can be close to 100%, which is much higher than the more mature and gradually commercialized alkaline water electrolysis (Alkaline Electrolysis Cells, AEC) and electrolytic water hydrogen production technology (Proton Exchange Membrane Electrolysis Cells, PEMEC). Among them, the co-electrolysis technology of solid oxide electrolysis cell (SOEC) can not only realize energy storage without capacity limitation, but also convert water and carbon dioxide into fuel. The electrode ma...
Claims
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IPC IPC(8): C25B11/042C25B1/042C25B3/03
CPCC25B11/042C25B1/042C25B3/03Y02E60/50
Inventor 周娟李沛函陈星余李福根
Owner NANJING UNIV OF SCI & TECH