An Electrochemomechanical Theory and Its Application to Solid Oxide Fuel Cells

电化学机械理论及其在固体氧化物燃料电池中的应用

• 批准号: 0726286
• 负责人: jianmin qu
• 金额: $ 33.49万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-15 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0726286&HistoricalAwards=false
• 关键词: Electrochemomechanical; Theory; Its; Application; Solid

The ultimate goal of this project is to understand how ionic solids respond to the combined electrical, electrochemical and mechanical loadings. To achieve this, the research is organized into four components: (1) to develop and validate a scientific theory that account for the interaction between electrochemical reactions and mechanical stresses in ionic solids, (2) to develop a numerical method for solving the nonlinear equations in the new theory, (3) to gain better understanding of the coupling between electrochemistry and thermomechanical stresses in ionic solids near microscopic defects such as voids and crack, and (4) to conduct experimental validation of the new theory.Ionic solids such as yttria-stabilized zirconia and gadolinium-doped ceria are commonly used to make electrolyte - a key component in solid oxide fuel cells. Solid oxide fuel cell is an electrochemical device that converts hydrogen into electricity without releasing harmful pollution. It is considered as one of the most promising green energy conversion technologies of the future. However, to make solid oxide fuel cell commercially variable, fracture failure of the electrolyte under combined mechanical and electrochemical loadings must be fully understood. This research is to meet such need. Besides contributing to science and engineering, the research activities will also have a broader impact on educating students. Key aspects of the educational plan include integrating research results into existing courses, involving undergraduates in engineering research, bridging graduate research across different disciplines, and engaging students from underrepresented groups in engineering research.

这个项目的最终目标是了解离子固体如何响应组合的电，电化学和机械负荷。 为了实现这一目标，研究分为四个部分：（1）发展和验证一种解释离子固体中电化学反应和机械应力之间相互作用的科学理论，（2）发展一种求解新理论中非线性方程的数值方法，（3）为了更好地理解离子固体中诸如空隙和裂纹等微观缺陷附近的电化学和热机械应力之间的耦合，离子固体如氧化钇稳定的氧化锆和掺钆的二氧化铈通常用于制备电解质-固体氧化物燃料电池的关键组分。 固体氧化物燃料电池是一种将氢转化为电而不释放有害污染物的电化学装置。 它被认为是未来最有前途的绿色能源转换技术之一。 然而，为了使固体氧化物燃料电池在商业上可变，必须充分理解在组合的机械和电化学负载下电解质的断裂失效。本研究正是为了满足这一需求。 除了对科学和工程做出贡献外，研究活动还将对教育学生产生更广泛的影响。教育计划的关键方面包括将研究成果整合到现有课程中，让本科生参与工程研究，在不同学科的研究生研究中架起桥梁，以及让来自代表性不足群体的学生参与工程研究。