Carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode and preparation method thereof

Abstract

The invention discloses a carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode and a preparation method thereof. Copper and samarium co-doped cerium oxide orcopper gadolinium co-doped cerium oxide powder is prepared by preparation of copper ions and samarium or gadolinium doped cerium oxide-based oxide, doped cerium oxide powder is used as precursor powder to prepare porous ceramic, a part of copper is permeated from lattices to obtain the carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode after hydrogen reduction on the porous ceramic. The conductivity of the positive electrode is improved, the three-phase reaction interface of the positive electrode is added, the carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode has favorable structure stability and excellent carbon-resistant and sulfur poisoning-resistant performance, and agglomeration can be prevented.According to the preparation method, copper is introduced to the positive electrode by ion doping and desolvation effect, a positive electrode-supported solid-state oxide fuel cell can be directly prepared by a traditional pressing or curtain coating and sintering method, the complicated process of the copper-containing positive electrode prepared by an impregnation reduction method is prevented,and the industrialization implementation becomes probable.

Description

technical field [0001] The invention relates to a fuel cell anode and a preparation method thereof, in particular to an anti-carbon deposition and anti-sulfur poisoning solid oxide fuel cell anode and a preparation method thereof. Background technique [0002] Fuel cell technology can directly convert the chemical energy of the fuel into electrical energy through the electrochemical reaction process, which can greatly reduce pollution, and because it is not limited by the Carnot cycle, its energy utilization rate can reach 40% to 60%. At the same time, by utilizing its thermal energy, the conversion rate of energy can be as high as more than 80%. These advantages make fuel cell technology very likely to become an important means of power supply in the near future. The final product of fuel cells using hydrogen as the optimal fuel is water, which has little pollution to the environment. However, there are many problems to be solved in the acquisition, storage and transporta...

AI Technical Summary

Problems solved by technology

However, the catalytic activity of Cu for fuel oxidation is worse than that of Ni, and CuO x With a low melting point (1326°C), it is difficult to prepare Cu-based anodes by oxide blending, sintering and reduction

Although copper-based anodes and cerium-based anodes have good anti-carbon deposition and anti-sulfur poisoning effects, they have low electrocatalytic activity or low electrical conductivity. Later studies found that introducing Cu and doped cerium oxide into the anode by impregnation method can Significantly improve the electrocatalytic activity and anti-carbon deposition and anti-sulfur poisoning performance of the electrode, but the impregnation method is cumbersome and the repeatability is not good, which is not conducive to large-scale production

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