Collaborative Research: Understanding the Reversible Formation of Sodium Hydrosulfide in Hybrid Electrolytes for High-Energy Density Storage

合作研究：了解用于高能量密度存储的混合电解质中硫氢化钠的可逆形成

• 批准号: 2208840
• 负责人: Zheng Li
• 金额: $ 31.99万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-10-01 至 2025-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2208840&HistoricalAwards=false
• 关键词: Collaborative; Research; Understanding; Reversible; Formation

The development of the high-energy density and low-cost sodium-sulfur (Na/S-NaHS) battery technology can potentially have a transformational impact on the nation’s energy security and critical materials supply chain. This will yield new methods and chemistry understanding to enable the use of this battery system in applications requiring more durability and lower-cost including electric vehicles and grid-scale energy storage for renewable energy generation. This project will enhance partnerships between academia and industry and facilitate the transfer of laboratory inventions to the marketplace. Graduate and undergraduate students will receive research and industry internships training through this project, and students from underrepresented groups will be recruited to participate in this project. A special aspect of this project is the collaboration with Argonne National Laboratory’s Advanced Photon Source for in situ characterization studies and hands-on student training.By characterizing sodium-polysulfide speciation and the electrode process of the battery, this project aims to provide fundamental insights into the multistep phase transformation reaction pathway of the sodium-sulfur chemistry in specific enabling electrolyte systems. By focusing on X-ray scattering characterization of the electrolyte system, this project will help understand the solvation structure evolution of the electrolyte systems at the molecular scale. By focusing on the exchange current density and nucleation and growth rate during electrochemical reactions, this project will enable a better understanding of the Na/S-NaHS electrode reaction kinetics. Together, these studies will advance the knowledge and understanding of the thermodynamics and kinetics of metal-polysulfide electrochemical reactions in various electrolyte systems in both solution and solid precipitation regions. The insight gained here will thus address critical needs in developing the high-energy density battery using abundant materials and lay the foundation for future research in this area.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.

高能量密度和低成本钠硫（Na/S-NaHS）电池技术的发展可能会对国家能源安全和关键供应材料链产生变革性影响，这将产生新的方法和化学理解。使该电池系统能够在需要更高耐用性和更低成本的应用中使用，包括电动汽车和用于可再生能源发电的电网规模储能。该项目将加强学术界和工业界之间的合作关系，并促进实验室发明向市场的转移。研究生和本科生将接受研究和通过该项目进行行业实习培训，并将招募来自代表性不足群体的学生参与该项目，该项目的一个特殊方面是与阿贡国家实验室的先进光子源合作进行原位表征研究和学生实践培训。该项目旨在表征钠多硫化物形态和电池的电极过程，旨在通过关注 X 射线散射，为特定电解质系统中钠硫化学的多步相变反应途径提供基本见解。通过对电解质系统的表征，该项目将有助于了解电解质系统在分子尺度上的溶剂化结构演变，通过关注电化学反应过程中的交换电流密度以及成核和生长速率，该项目将有助于更好地了解Na。 /S-NaHS 电极反应动力学。这些研究将增进对溶液和固体沉淀区域中各种电解质系统中金属-多硫化物电化学反应的热力学和动力学的认识和理解。因此，这里获得的奖项将解决利用丰富材料开发高能量密度电池的关键需求，并为该领域的未来研究奠定基础。该奖项反映了 NSF 的法定使命，并通过利用基金会的智力优势和技术进行评估，认为值得支持。更广泛的影响审查标准。