Hollow Fibre Solid Oxide Fuel Cells

固体氧化物燃料电池(SOFC)，以其高(高达80%)的化学-电/热转换效率、燃料进气(氢、天然气、甲醇和其他石油产品等)的多功能性而闻名。以及它们相对环保的操作，具有很高的市场潜力，但由于突出的技术和经济问题，尚未大规模生产。本项目旨在通过建立和开发一种使用中空纤维制造的新型SOFC设计的可行性来解决这些问题，从而增加电极的比表面积，增加单位体积/质量的功率输出，促进高温下的密封，并降低成本。中空纤维结构的电解液将首先通过相转化/烧结相结合的技术制备，它由一层薄而致密的层组成，两侧都有完整的多孔子层。然后，多孔子层将与阳极和阴极材料一起沉积，以产生单一的中空纤维SOFC，其束随后将组装成SOFC堆栈。单电池和SOFC电堆的性能将作为制造和操作参数的函数进行调查。最初，Y稳定的氧化锆(YSZ)将被用作电解液，因为已经确定了以纤维形式生产这种电解液的可行性，尽管还没有达到目标电解液厚度&lt；10微米并且具有所需的结构；为了将操作温度从大约900℃降低到500-750℃，随后将使用Ce0.9Gd0.1O1.95(CGO)电解液。由于本提案涉及确定反应堆设计概念的可行性，将在镍阳极上使用氢作为模型燃料，同时在La0.6Sr0.4Co0.2Fe0.803(LSCF)阴极上进行氧还原；反应堆与其他燃料的性能将作为后续项目提案的一部分。

Solid Oxide Fuel Cells (SOFCs), known for their high (up to 80%) chemical to electrical/thermal conversion efficiencies, their versatility in fuel intake (hydrogen, natural gas, methanol and other petroleum products etc.) and their relatively environmentally benign operation, have a high market potential, but are not yet mass produced, because of outstanding technological and economic issues.This proposed project aims to address these problems by establishing the feasibility of, and developing, a novel design of SOFC, fabricated using hollow fibres, thereby increasing the specific surface area of electrodes, increasing the power output per unit volume/mass, facilitating sealing at high temperatures, and decreasing costs. The electrolyte in the hollow fibre configuration will be fabricated firstly by a combined phase inversion/sintering technique and consists of a thin dense layer, with integrated porous sub-layers on both sides. The porous sub-layers will then be deposited with anode and cathode materials, to produce a single hollow fibre SOFC, bundles of which will be assembled subsequently into a SOFC stack. The performance of both single cells and SOFC stacks will be investigated as a function of the fabrication and operational parameters. Initially, yttrium-stabilised zirconia (YSZ) will be used as the electrolyte, as the feasibility of producing this in fibre form has already been established, though not yet at the targeted electrolyte thickness of < 10 micron and with the required structure; to decrease operating temperatures from ca. 900 to 500-750 C, Ce0.9Gd0.1O1.95 (CGO) electrolyte will be used subsequently. As this proposal is concerned with establishing feasibility of the reactor design concept, hydrogen will be used as a model fuel at Ni anodes, coupled to oxygen reduction at La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathodes; reactor performance with other fuels would be part of a subsequent project proposal.