GOALI: Collaborative Research: An Experimental and Theoretical Study of the Microstructural and Electrochemical Stability of Solid Oxide Cells

GOALI：协作研究：固体氧化物电池微观结构和电化学稳定性的实验和理论研究

• 批准号: 1912151
• 负责人: Katsuyo Thornton
• 金额: $ 22万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1912151&HistoricalAwards=false
• 关键词: GOALI; Collaborative; Research; Experimental; Theoretical

NON-TECHNICAL DESCRIPTION: Solid oxide cells are a rapidly developing technology for clean efficient conversion of fuels-to-electricity and electricity-to-fuels. While much of the development has been as solid oxide fuel cells for stationary power generation, important new applications have emerged that are critical for reducing greenhouse gas emissions, including electricity storage, conversion of renewable electricity to fuels, and fuel-flexible range extenders for electric vehicles. A key barrier to more widespread application of solid oxide cells is their limited operating lifetime - more research is needed to understand and ultimately mitigate degradation mechanisms that limit lifetime. This project provides a fundamental understanding of degradation processes that complements more practical studies, e.g., long-term fuel cell life tests, being carried out in industry. The project is achieving this understanding by developing and testing theoretical models based on measurements of device performance degradation and three-dimensional imaging of device damage. The project involves an industrial partner, Nissan, Inc., ensuring that cells are tested under application-relevant conditions. The results are relevant to many research communities, ranging from modelers who can utilize three-dimensional data and simulation methods, to industrial developers who can use the results to help improve their fuel cells. Graduate, undergraduate, and high-school students receive extensive training that will be valuable in their future careers - they find employment in energy-related industries, auto manufacturers, and many others. Student diversity is emphasized. Dissemination of the challenges and results with the public occur through two forums: Science Cafe in Evanston and the Ann Arbor Hands-On Museum, the latter attracts youngsters from surrounding communities that are disadvantaged (e.g., Ypsilanti) and/or rural (majority of communities in Washtenaw and its surrounding counties).TECHNICAL DETAILS: This project focuses on solid oxide cell performance and long-term stability; this is currently relevant because new applications involving cyclic operation introduce new degradation mechanisms. Three-dimensional imaging of fuel cell structure is carried out using focused ion beam - scanning electron microscopy, atom-probe tomography, and transmission X-ray microscopy, the latter done in a way that directly observes structural and chemical changes due to cell operation. These images are combined with three-dimensional simulations of electrode performance and structural evolution based on the phase field modeling, which will utilize high performance computing. This addresses a key challenge - to develop simulation models based on microstructural changes observed in short accelerated tests, and then apply them to accurately predict long-term (beyond 5 years) performance changes. This combination of 3D microstructures, validated simulation tools, and computationally intensive data analysis provides a framework that is broadly useful for design and discovery of electrode materials. Students receive training in state-of-the-art experimental and theoretical research methods, and directly interact with industrial and national laboratory researchers, the latter to utilize powerful three-dimensional imaging capabilities at Argonne and Brookhaven National Laboratories.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述：固体氧化物电池是一种快速发展的清洁、高效的燃料到电力和电力到燃料的转换技术。虽然大部分开发都是作为用于固定发电的固体氧化物燃料电池，但也出现了对减少温室气体排放至关重要的重要新应用，包括电力储存、可再生电力到燃料的转换，以及电动汽车的燃料灵活续航里程扩展器。固体氧化物电池更广泛应用的一个关键障碍是其有限的工作寿命--需要更多的研究来了解并最终缓解限制寿命的降解机制。该项目提供了对降解过程的基本了解，补充了正在工业中进行的更多实际研究，例如长期燃料电池寿命测试。该项目正在通过开发和测试基于设备性能退化测量和设备损坏的三维成像的理论模型来实现这一理解。该项目涉及工业合作伙伴日产公司，以确保电池在与应用相关的条件下进行测试。这些结果与许多研究团体有关，从可以利用三维数据和模拟方法的建模人员，到可以利用结果帮助改进燃料电池的工业开发人员。研究生、本科生和高中生接受了广泛的培训，这些培训对他们未来的职业生涯将是有价值的--他们在能源相关行业、汽车制造商和许多其他行业找到工作。强调学生的多样性。通过两个论坛向公众传播挑战和结果：埃文斯顿的Science Cafe和Ann Arbor动手博物馆，后者吸引来自周围弱势社区(例如Ypsilanti)和/或农村(华盛顿及其周围县的大多数社区)的年轻人。技术细节：该项目侧重于固体氧化物电池的性能和长期稳定性；这一点目前是相关的，因为涉及循环操作的新应用引入了新的降解机制。燃料电池结构的三维成像使用聚焦离子束扫描电子显微镜、原子探针断层扫描和透射式X射线显微镜，后者是以直接观察电池运行引起的结构和化学变化的方式进行的。这些图像与基于相场建模的电极性能和结构演变的三维模拟相结合，这将利用高性能计算。这解决了一个关键挑战-基于在短期加速测试中观察到的微观结构变化开发模拟模型，然后将其应用于准确预测长期(超过5年)的性能变化。这种3D微结构、经过验证的模拟工具和计算密集型数据分析的组合为电极材料的设计和发现提供了一个广泛有用的框架。学生接受最先进的实验和理论研究方法培训，并直接与工业和国家实验室研究人员互动，后者利用阿贡和布鲁克海文国家实验室强大的三维成像能力。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Simulation of the diffusional impedance and application to the characterization of electrodes with complex microstructures

扩散阻抗模拟及其在复杂微结构电极表征中的应用

• DOI: 10.1016/j.electacta.2020.136534
• 发表时间: 2020
• 期刊: Electrochimica Acta
• 影响因子: 6.6
• 作者: Yu, Hui-Chia;Adler, Stuart B.;Barnett, Scott A.;Thornton, K.
• 通讯作者: Thornton, K.

Towards the Validation of a Phase Field Model for Ni Coarsening in Solid Oxide Cells

• DOI: 10.1016/j.actamat.2021.116887
• 发表时间: 2021-04
• 期刊: Acta Materialia
• 影响因子: 9.4
• 作者: M. Trini;S. D. Angelis;Peter Stanley Jørgensen;P. Hendriksen;Katsuyo Thornton;Ming Chen