CAREER: Probing Interfaces in Energy Storage Materials Using Dynamic Impedance Spectroscopy and Multiharmonic Electrochemical Quartz Crystal Microbalance Dissipation

在化学系化学测量和成像计划的支持下，以及化学结构、动力学和机械B计划以及材料研究部固态材料化学计划的部分共同资助下，波士顿马萨诸塞大学的Niya Sa博士和她的研究团队正在开发创新的方法，以增进我们对充电电池化学的理解。这项工作解决了能源储存、利用和环境管理领域的全球挑战。Sa博士将致力于通过外展活动向K-12学生和在科学-技术-工程-数学(STEM)中代表性不足的小组成员解释电化学、电池化学和绿色化学的原理，向公众传播基础科学及其重要性。获得该奖项后，Sa博士的团队将实施混合动态阻抗谱/多谐电化学石英晶体微平衡耗散(Deis EQCM-D)平台，以探测复杂的界面系统。具体地说，他们试图提高对储能材料的动态固体电解质界面(SEI)的理解--这对推进下一代储能设备至关重要，但由于缺乏可靠的现场实验技术而受阻。这项工作的主要焦点是能够量化微观质量交换，这是SEI溶解、重建和不稳定的原因。将DEIS与EQCM-D联用提供了比先前报道的非原位电化学阻抗(EIS)或重力EQCM测量更大的进步。SA小组致力于分析化学和材料科学之间的工作，旨在促进对储能材料和电解液的基本理解和新方法，在这些材料和电解液中，性能特性由界面上的动态离子插层和质量传输反应决定。从事这项工作的学生将接受最先进的电分析技术、储能概念、仪器和模拟方面的培训。Sa博士致力于为代表不足的群体提供教育机会，并通过与当地科学博物馆的合作与当地社区接触。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。

With support from the Chemical Measurement and Imaging Program in the Division of Chemistry and partial co-funding from the Chemical Structures, Dynamics, and Mechanisms - B program, and the Solid State Materials Chemistry program in the Division of Materials Research, Dr. Niya Sa and her research team at the University of Massachusetts Boston are developing innovative approaches to advancing our understanding of the chemistry of rechargeable batteries. The work addresses global challenges in the areas of energy storage, utilization, and environmental stewardship. Dr. Sa will work to communicate the underlying science and its importance to the general public through outreach activities that seek to explain the principles of electrochemistry, battery chemistry and green chemistry to K-12 students and members of groups underrepresented in science-technology-engineering-mathematics (STEM). With this award, Dr. Sa’s team will be implementing the hybrid Dynamic Impedance Spectroscopy/Multiharmonic Electrochemical Quartz Crystal Microbalance Dissipation (DEIS EQCM-D) platform to probe complex interfacial systems. Specifically, they seek to improve understanding of the dynamic Solid Electrolyte Interphase (SEI) of energy storage materials - critical for advancing next-generation energy storage devices, yet impeded by the lack of reliable in situ experimental techniques. The major focus of this work is to enable quantification of the microscopic mass exchange that accounts for SEI dissolution, reconstruction, and instability. Coupling DEIS with EQCM-D offers a significant advance over previously reported ex situ electrochemical impedance (EIS) or gravimetric EQCM measurements. Working at the interface between analytical chemistry and material science, the Sa group seeks to advance fundamental understanding and enable new approaches to energy storage materials and electrolytes where performance characteristics are critically determined by the dynamic ion intercalation and mass transport reactions at interfaces. Students engaged in the work will be trained in state-of-the-art electroanalytical techniques, energy storage concepts, instrumentation, and simulations. Dr. Sa is working to provide educational opportunities for underrepresented groups, and to engage with the local community through collaboration with the local Science Museum.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.