Collaborative Research: Understanding the discharge mechanism at solid/aprotic interfaces of Na-O2 battery cathodes to enhance cell cyclability

合作研究：了解Na-O2电池阴极固体/非质子界面的放电机制，以增强电池的循环性能

• 批准号: 2342025
• 负责人: Jeffrey Greeley
• 金额: $ 24.81万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-08-01 至 2027-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2342025&HistoricalAwards=false
• 关键词: Collaborative; Research; Understanding; discharge; mechanism

Dr. Eranda Nikolla of the University of Michigan and Dr. Jeffrey Greeley of Purdue University will study the chemistry and deactivation mechanisms at solid-aprotic electrolyte interfaces in order to advance the development of next-generation energy storage devices, such as sodium-oxygen (Na-O2) batteries. Although Na-O2 batteries are promising, limited long-term stability, and lack of fundamental, molecular-level understanding of the mechanisms that govern durability, have impeded progress. The PIs seek to address this challenge by combining experimental and theoretical studies. The insights from the work will lead to a general framework that can guide the design of the cathode/electrolyte interfaces to enable stable cycling of discharge products for Na-O2 batteries. Also, the PIs will partner with local K-12 students in the Metro Detroit area and West Lafayette, IN to involve economically disadvantaged students in summer research internships and student research exchanges. Aprotic Na-O2 batteries have gained significant attention as viable alternatives to commercial Li-ion batteries. Owing to their high theoretical energy densities and reversible redox chemistries, Na-O2 batteries offer opportunities to achieve high discharge capacities and low charge overpotentials by controlling the nature of discharged products at the cathode. While this technology is very attractive, maintaining stability of Na-O2 batteries is a significant challenge. In the present project, PIs Nikolla and Greeley seek to alleviate this issue by developing a combined experimental/theoretical approach to advance understanding of the deactivation mechanisms of Na-O2 cells driven by changes at the cathode/electrolyte interface, with the goal of improving cell cyclability. The research plan will involve: (i) determining the factors that govern deactivation and byproduct formation, both as a function of electrochemical potential and under resting conditions (no applied current), in Na-O2 batteries, (ii) elucidating the effect of incorporating oxide electrocatalysts to tune the product formation at the cathode of Na-O2 battery cells, so as to minimize cell deactivation, and (iii) developing a general framework to guide the design of cathode/electrolyte interfaces that result in stable cycling of Na-O2 batteries.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.

密歇根大学的Eranda Nikolla博士和普渡大学的Jeffrey Greeley博士将研究固体寄托电解质接口的化学和停用机制，以推动下一代储能设备的开发，例如钠氧（NA-O2）电池。尽管NA-O2电池是有希望的，长期的稳定性有限，并且缺乏对控制耐用性机制的基本分子水平的理解，但仍阻碍了进步。 PI寻求通过结合实验和理论研究来应对这一挑战。工作中的见解将导致一个通用框架，该框架可以指导阴极/电解质接口的设计，以实现NA-O2电池的稳定循环循环。此外，PIS将与底特律大都会地区和西拉斐特的本地K-12学生合作，以使经济上处于弱势的学生参与夏季研究实习和学生研究交流。 Aprotic Na-O2电池已成为商业锂离子电池的可行替代品。 NA-O2电池由于其高理论能量密度和可逆的氧化还原化学分配提供了机会，提供了实现高排放能力和低电量超电势的机会，通过控制阴极上排出的产品的性质。尽管这项技术非常有吸引力，但保持NA-O2电池的稳定性是一个重大挑战。在本项目中，PIS Nikolla和Greeley试图通过开发一种合并的实验/理论方法来减轻此问题，以提高对由阴极/电解质界面上的变化驱动的Na-O2细胞失活机制的理解，并具有提高细胞环境的目标。 研究计划将涉及：（i）确定在Na-O2电池中确定均取消活力和副产物形成的因素，既取决于电化学潜力的函数，又是在NA-O2电池中的静止条件（无应用），（ii）阐明氧化物电催化剂的效果，以将氧化物电型融合到II元素中，以调整ii dune dune dune dune dune dune dune dune dune of ina cell of the of the of the of the of the of the of of na-o2电池的生产。一个通用框架，用于指导阴极/电解质界面的设计，导致NA-O2电池的稳定循环。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估审查标准来通过评估来获得支持的。