MEMANO · On the use of mesoporous and macroporous materials for the micro-structural optimisation of anode materials for Fuel Cells Application to gas natural oxidation
6РП — Действия „Мария Кюри“
- Период
- 2005-04-01 → 2006-03-31
- Финансиране от ЕС
- 40 000 €
- Участници
- 1
- Схема
- ERG
Линиите свързват координатора с партньорите.
Накратко на български
Горивните клетки се изследват чрез оптимизиране на структурата на техните аноди и използване на материали като LSTMG. Това помага за подобряване на електрохимичните свойства и контрола върху порьозността на електродите за по-ефективно окисляване на природен газ.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - MEMANO (On the use of mesoporous and macroporous materials for the microstructural optimisation of anode materials for Fuel Cells. Application to gas natural oxidation)
The main objectives of this project were: 1) test and improvement of the materials obtained in University of St Andrews in 2004. In this sense a new material La4Sr8Ti11Mn0.5Ga0.5O37.5 (LSTMG) was tested and the results published in Nature, 2 February, vol. 439, 2006, p. 568-571. 2) the design of a symmetrical fuel cell using the same material as both cathode and anode. A new material La0.75Sr0.25Cr0.5Mn0.5O3-z was found to be stable and with good electrochemical properties in oxidising and reducing conditions. The fuel cell shows promising performances, exceeding the 500 mW/cm2 at 950 degrees Celsius under humidified H2. The results has been recently accepted for publishing in Electrochimica Acta, vol. 52, 2006, p. 278-284. 3) to develop a new method of optimisation of the electrode microstructure. This was obtained using an organic material as a frame. It allows a total control of the thickness and porosity of the materials under study. The result has been published early this year in J. Mater. Chem. Vol. 16, 2006, p. 540-542. Additionally to all of this, the structural, electrochemical characterisation and catalytic properties of several materials were or are under investigation and several publications are expected for this year showing the aforementioned results.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Currently, the search for an improvement in the anode performance is focused in two main areas: improvement by optimising the Ni-YSZ cermet anode properties or improvement through the use of new materials. As for the first line, porosity is one of the factor s responsible for the properties because it controls both the transport of gas fuel to the reaction sites as well as the size of the triple phase boundary (TPB). This zone is defined as the interface between electrode, electrolyte and gas reactants.Current materials generally do not present enough porosity at high temperatures and therefore the surface area is small. In this respect, a number of authors have tried to improve porosity by introducing certain additives to the anode and thus modify the synthesis conditions. However, there is no precise control over the final porosity. Therefore, we propose a relatively novel route in this project, to control precisely the microstructure, which consists in the use of materials with high porosity in an ordered arrangement. Such 3D matrix of meso and macroporous of organic materials like poly(methyl methacrylate) (PMMA),that might be used afterwards as a template to insert a solution containing the anode and/or the catalysts to then being removed by the appropriate thermal treatment. After this process, we will obtain a material presenting the original arrangement of the pores.This control over the microstructure should imply a significant improvement in the performance and consequently, it might probably allow a reduction in the operating temperatures of the current fuel cells. As for the search of new materials, mixed oxide materials promise an improvement over YSZ cermets, especially due to the ability" of transition metals to present multiple oxidation states. In fact, a perovskite-based anode material developed in our research group, La0.75Sr0.25Cr0.5Mn0.5O3-del shows comparable electrochemical performance to Ni/YSZ and, furthermore, improving the catalytic activity."
Оригинален текст от CORDIS (на английски).
Участници
- UNIVERSIDAD DE LA LAGUNA · LA LAGUNAКоординаторИспания
Връзки
Данни: CORDIS, © Европейски съюз