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首页> 外文学位 >Development of alternative anode based on doped strontium titanate for solid oxide fuel cells.
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Development of alternative anode based on doped strontium titanate for solid oxide fuel cells.

机译：基于掺杂钛酸锶的固体氧化物燃料电池替代阳极的开发。

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Solid oxide fuel cells (SOFCs) have received a substantial amount of attention in recent years as clean energy technologies are being urgently pursued. The conventional anode material, a mixture of Ni and Y stabilized ZrO2 (YSZ), though known for its good activity in pure H2 , suffers serious degradation when operated under harsh conditions, such as contaminated fuel streams, multiple reduction-oxidation cycles, etc. Many researchers have devoted their efforts to the search for alternative anode materials remedies for existing problems. The present project intends to develop an alternative anode that endures harsh conditions while still offering a similar level of performance as Ni-YSZ. Yttrium and cobalt doped SrTiO3 are chosen as the base materials according to preliminary results in the literature. Several examinations are performed on these materials for evaluation and optimization, including phase stability, electric conductivity, reduction-oxidation cycles, catalytic activities and a preliminary study of long-term performance. The results demonstrate impressive potential as a replacement for Ni-YSZ. Catalytic activity, characterized by both DC polarization and AC impedance methods, though weak in stand-alone anode, reaches an acceptable performance range upon addition of dispersed nano Ni particles. A study of long-term performance did show some apparent degradation. However, the degradation appeared to be mostly due to a defective electrolyte instead of deteriorating anode.
机译：近年来，随着对清洁能源技术的紧迫追求，固体氧化物燃料电池（SOFC）受到了广泛关注。传统的阳极材料是Ni和Y稳定的ZrO2（YSZ）的混合物，尽管以其在纯H2中的良好活性而著称，但在苛刻的条件下运行时会严重降解，例如污染的燃料流，多个还原-氧化循环等。许多研究人员致力于寻找解决现有问题的替代阳极材料的方法。本项目旨在开发一种可承受苛刻条件的替代阳极，同时仍提供与Ni-YSZ相似的性能水平。根据文献中的初步结果，选择了钇和钴掺杂的SrTiO3作为基材。对这些材料进行了几项检查以进行评估和优化，包括相稳定性，电导率，还原-氧化循环，催化活性和长期性能的初步研究。结果表明，它具有替代Ni-YSZ的巨大潜力。以直流极化和交流阻抗方法为特征的催化活性，尽管在独立阳极中较弱，但在添加分散的纳米镍颗粒后达到了可接受的性能范围。对长期性能的研究确实显示出一些明显的降低。然而，降解似乎主要是由于电解质缺陷而不是阳极劣化。

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