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)计划的支持下，犹他大学的Luisa Whittaker-Brooks正在开发用于全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液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对不可逆转的变化更具抵抗力，他们的发现可能会导致电池储存更多能量，降解速度更慢。该项目还将为国家STEM(科学、技术、工程和数学)劳动力的发展做出贡献，为博士后学者、研究生和本科生以及高中生提供研究机会，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。根据这一奖项，犹他大学的Luisa Whittaker-Brooks将使用非共价相互作用将TiS2(电极)纳米线、Li10GeP2S12(固态电解液)和自掺杂二亚胺有机小分子(固态电解液界面调节剂和磁矩诱导剂)连接在一起，从而能够设计出磁矩感应(非金属)垂直取向的一维电化学系统，其中它们的电化学性质可以在外加磁场下进行调节。这些研究将包括：(I)具有可调界面的有机-无机异质结构的合成和表征；(Ii)异质结构的电化学性质的阐明，重点是与组成和形态特征相关的界面电荷/自旋动力学；以及(Iii)使用电子顺磁共振(EPR)和磁测量来研究和控制异质结构，定制界面相，并指导磁场下模型体系中的离子/电荷输运。这些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，从而促进适应性、自我修复、控制动态界面形成的复杂界面区域，以及消除有害化学物质以延长电化学储能系统的寿命和提高安全性，从而阐明材料设计和基本物理现象的调制。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 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.