Nano composite cathode as well as preparation and application thereof

Abstract

The invention discloses a nano composite cathode for a high-temperature solid oxide electrolytic tank as well as a preparation method and application thereof. The structure of the nano composite cathode is a YSZ skeleton which is prepared by adopting PMMA as a pore forming agent and has micro-pores, an LSFM-GDC (M = Mn, Fe, Ni) composite nano electrode catalyst is prepared by adopting a co-impregnation method, and the nano composite cathode for the high-temperature solid oxide electrolytic tank is prepared after roasting. The high-temperature solid oxide nano composite cathode prepared by theinvention is suitable for high-temperature CO2 electrolysis and CO2-H2O co-electrolysis; good electrochemical performance is achieved on high-temperature CO2 electrolysis and Co2-H2O co-electrolysis,the performance and the operation stability of the solid oxide electrolytic tank can be remarkably improved, and good development prospects are achieved. The method is suitable for the field of high-temperature carbon dioxide reduction, the field of clean carbon fuel preparation and the technical field of energy and fuel cells.

Description

technical field [0001] The invention relates to the technical field of energy and fuel cells, in particular to a nanocomposite cathode and its preparation method and application. Background technique [0002] my country's conventional fossil energy such as coal, oil and natural gas demand is growing, while its reserves are limited, making the national energy security situation increasingly severe. In addition, the consumption of traditional fossil energy and CO 2 Related to emissions, climate and environmental changes caused by them are also important issues discussed by the international community today. A solid oxide electrolysis cell (SOEC) is an electrochemical device that converts electrical and thermal energy into chemical energy in fuels at moderate to high temperatures in an efficient and environmentally friendly manner. Solid oxide electrolytic cells) work in the temperature range of 600-1000 °C. Solid oxide electrolysis cell technology can produce H by electroly...

AI Technical Summary

Problems solved by technology

[0003] In the solid oxide electrolytic cell, the traditional fuel electrode is usually a porous electrode composed of metal Ni and YSZ, but its high temperature CO 2 Electrolysis and co-electrolysis of water and CO 2 There are still some unresolved problems in the application of Ni, such as poor oxygen reduction stability, a certain concentration of reducing gas is required to prevent the Ni in the electrode from being oxidized to NiO, and Ni particles are agglomerated at high temperature, volatilized at high temperature, and easily affected by various impurity elements. The performance of the battery is degraded, and there are problems such as carbon deposition