CAS: Magnetic moment-induced adaptability of vertically-oriented 1D electrochemical systems

在化学系大分子、超分子和纳米化学（MSN）项目的支持下，犹他大学的路易莎·惠特克-布鲁克斯正在开发用于所有固态电化学储能的一维（1D）纳米结构。虽然电化学系统可以储存大量的能量，但充电和放电循环会导致电极和电解质的结构和组成发生不可逆转的变化，从而降低性能。惠特克-布鲁克斯博士和她的学生将利用磁场使电化学系统更能抵抗不可逆的变化，他们的发现可能会使电池储存更多的能量，降解得更慢。该项目还将通过为博士后学者、研究生、本科生以及高中生提供研究机会，为国家STEM（科学、技术、工程和数学）劳动力的发展做出贡献，该团队将开发科学演示，向当地学校的K-12学生介绍概念和研究成果。根据该奖项，犹他大学的Luisa Whittaker-Brooks将使用非共价相互作用来连接TiS2（电极）纳米线，Li10GeP2S12（固态电解质），和自掺杂的苝二亚胺有机小分子（固体电解质间相改性剂和磁矩诱导剂），以实现磁矩诱导（非金属）垂直定向一维电化学体系的设计，其电化学性能可以在外加磁场下调谐。这些研究将整合：(i)具有可调界面的有机-无机异质结构的合成和表征；（ii）阐明异质结构的电化学性质，重点是与组成和形态特征相关的界面电荷/自旋动力学；（iii）使用电子顺磁共振（EPR）和磁强计来研究和控制非均质性，定制界面，并在磁场下引导模型系统中的离子/电荷传输。该研究可以通过仔细阐明界面和固态晶体化学对有机-无机一维异质结构性能的作用，促进适应性，自修复，控制动态界面形成的复杂界面区域，消除有害化学物质，延长电化学储能系统的使用寿命和提高安全性，从而为材料设计和基本物理现象的调制提供指导。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值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 Macromolecular, Supramolecular, and Nanochemistry (MSN) Program in the Division of Chemistry, Luisa Whittaker-Brooks of the University of Utah is developing one-dimensional (1D) nanostructures for all solid-state electrochemical energy storage. While electrochemical systems can store significant amounts of energy, the charging and discharging cycles lead to irreversible changes in the structure and composition of the electrode and electrolyte, degrading performance. Dr. Whittaker-Brooks and her students will use magnetic fields to make electrochemical systems more resistant to irreversible changes, and their discoveries could lead to batteries that store more energy and degrade more slowly. The project will also contribute to the development of a National STEM (science, technology, engineering and mathematics) workforce by providing research opportunities for postdoctoral scholars, graduate, and undergraduate students, as well as high school students, and the team will develop science demonstrations to introduce the concepts and research results to K-12 students at local schools. Under this award, Luisa Whittaker-Brooks at the University of Utah will use non-covalent interactions to interface TiS2 (electrode) nanowires, Li10GeP2S12 (solid-state electrolyte), and self-doped perylene diimide organic small molecules (solid-electrolyte interphase modifier and magnetic moment inducers) to enable the design of magnetic moment-induced (non-metallic) vertically oriented 1D electrochemical systems where their electrochemical properties can be tuned under an applied magnetic field. The studies will integrate: (i) the synthesis and characterization of organic-inorganic heterostructures with tunable interfaces; (ii) elucidation of the electrochemical properties of heterostructures with an emphasis on interfacial charge/spin dynamics correlated to compositional and morphological characteristics; and (iii) the use of electron paramagnetic resonance (EPR) and magnetometry to investigate and control heterogeneities, tailor interphases, and guide ion/charge transport in model systems under a magnetic field. The studies could shed light on both materials design and modulation of fundamental physical phenomena by carefully elucidating the role of interfaces and solid-state crystal chemistries on the properties of organic-inorganic 1D heterostructures to promote adaptability, self-healing, control of the complex interphase region formed at dynamic interfaces, and the elimination of detrimental chemistries to extend the lifetime and improve the safety of electrochemical energy storage systems.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.