Ceria-based Cathodes for High Performance Electrolysis Cells
用于高性能电解池的二氧化铈基阴极
基本信息
- 批准号:467256728
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:
- 资助国家:德国
- 起止时间:
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
Wider research context/theoretical framework: H2O and CO2 splitting in high temperature solid oxide electrolysis cells (SOECs) is a highly efficient and promising approach for producing green H2 and CO. Novel ceria-based cathodes have the potential to take SOEC technology a giant step further due to their high electro-catalytic activity, low degradation rates, and low coking susceptibility under CO2 electrolysis. Hence, detailed knowledge on the complex interrelations between electrochemical performance, 3D microstructure, and me-chanical behaviour of ceria-based cathodes is essential. Hypotheses/research questions/objectives: We propose two strategies to achieve the basic knowledge required for fabricating such highest per-forming and long-term stable ceria-based SOEC cathodes. First, we will elaborate a novel processing concept for Ni/Gd-doped CeO2 (GDC) electrodes by redox-induced self-modification, during which the ceria phase partly overgrows the Ni particles. This provides high coking tolerance, mechanical strength and large GDC surface area for high electro-catalytic activity. Second, we will use the mixed ionic/electronic conductivity of GDC in reducing conditions to develop novel SOEC cathodes with single-phase GDC active layer. We will tackle the issue of chemical expansion by doping variations, in-situ expansion measurements, and numerical simulations to gain in-depth understanding of the mechanical behaviour. Approach/methods: To reach our goals we will implement an interdisciplinary working plan with tight cooperation of specialised research groups, who already have noteworthy experience working together in joint pro-jects. The key to success is to understand ceria-based SOEC cathodes down to the atomistic level and to use this knowledge for a targeted design of novel processing routes. We will use model systems for basic material characterization and directly transfer the results to processing of 3D porous ceria cathodes as well as phase field simulations of operating electrodes. 3D microstructure analysis and in-situ electron microscopy will deliver detailed insights into the relevant processes and their interplay. Level of originality/innovation: The high degree of novelty of this proposal arises from the uncommonly large methodological breadth of the contributing groups, which will allow us to understand the behaviour of ceria-based 3D porous SOEC cathodes on the level of elementary properties and atomistic processes of the used materials. We will thus be able to provide the basic understanding for obtaining novel, highest per-forming, long-term stable, and coking resistant ceria-based fuel electrodes, which will push SOEC technology a large step forward.
更广泛的研究背景/理论框架:高温固体氧化物电解池(SOECs)中的H2O和CO2裂解是生产绿色H2和CO的一种高效和有前途的方法。新型氧化铈基阴极由于其高电催化活性,低降解速率和CO2电解下的低焦化敏感性,有可能使SOEC技术向前迈出一大步。因此,对电化学性能、3D微观结构和铈基阴极的机械行为之间复杂的相互关系的详细了解是必不可少的。 假设/研究问题/目标:我们提出了两种策略,以实现制造这种最高性能和长期稳定的氧化铈基SOEC阴极所需的基本知识。首先,我们将阐述一种新的加工概念,Ni/Gd掺杂的CeO 2(GDC)电极氧化还原诱导的自我修改,在此期间,氧化铈相部分超过Ni颗粒。这为高电催化活性提供了高焦化耐受性、机械强度和大GDC表面积。其次,我们将利用GDC在还原条件下的混合离子/电子导电性来开发具有单相GDC活性层的新型SOEC阴极。我们将通过掺杂变化,原位膨胀测量和数值模拟来解决化学膨胀问题,以深入了解机械行为。 方针/方法:为了实现我们的目标,我们将实施一项跨学科的工作计划,与专业研究小组密切合作,这些研究小组已经在联合项目中有着值得注意的合作经验。成功的关键是了解基于氧化铈的SOEC阴极到原子水平,并将这些知识用于新工艺路线的目标设计。我们将使用模型系统进行基本材料表征,并将结果直接转移到3D多孔氧化铈阴极的处理以及操作电极的相场模拟。3D微观结构分析和原位电子显微镜将为相关过程及其相互作用提供详细的见解。 原创性/创新水平:这一提议的高度新奇源于贡献小组的不同寻常的大方法广度,这将使我们能够在所用材料的基本性质和原子过程的水平上了解基于二氧化铈的3D多孔SOEC阴极的行为。因此,我们将能够为获得新颖的,最高性能的,长期稳定的,抗焦化的二氧化铈基燃料电极提供基本的理解,这将推动SOEC技术向前迈进一大步。
项目成果
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Professor Dr.-Ing. Martin Bram其他文献
Professor Dr.-Ing. Martin Bram的其他文献
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