Detection of Free Radical Species in Metal Air Batteries & Organo-Metallic Complexes

金属空气电池中自由基种类的检测

• 批准号: RTI-2017-00640
• 负责人: Goward, Gillian
• 金额: $ 10.93万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=616734
• 关键词: Detection; Free; Radical; Species; Metal

This proposal outlines the need for a benchtop electron paramagnetic resonance (EPR) spectrometer to facilitate characterization of the role and mechanism of reaction of unpaired electrons in a variety of molecules and electrochemical devices. In the context of the popular science, unpaired electrons create the “oxidants” against which “anti-oxidants” work. They are known to be highly reactive and often challenging to characterize. EPR is a perfect tool for such characterization, however EPR instruments used to be large, cumbersome beasts, with high upfront purchase costs. Recently, benchtop EPR spectometers have become available, enabling routine use of such instrumentation at affordable prices. The maintenance is negligible, as are the ongoing operational costs. Therefore, we request funding for a benchtop EPR instrument, to be housed within the nuclear magnetic resonance (NMR) facility at McMaster University, and available to any users of the NMR facility who have received EPR training, (which includes graduate students within the department of chemistry, and faculties of science and engineering), using a nominal user fee structure. Both the Goward and Emslie groups are active research teams, with large groups, who are very keen to have regular access to the data provided by EPR for ongoing projects. In the Emslie group there is an active research program on developing designer molecules that incorporate transition metals, and are utilized to create thin films for microelectronics applications. The research program in the Goward group focuses on the characterization of the lithium and sodium ion transport properties within Li+ and Na+ battery cathode materials, utilizing advanced solid-state NMR. Most recently, the Goward group have investigated a new type of battery materials, the so-called metal-air batteries, in which superoxide radicals are key intermediates in the reaction pathway. An in-house EPR spectrometer would provide direct benefit to both research groups, and would be readily available to students for training and regular use within the research programs described herein.

该提议概述了需要进行台式电子顺磁共振（EPR）光谱仪以促进在多种分子和电化学设备中未配对电子反应的作用和机制的表征。在流行科学的背景下，未配对的电子产生了“抗氧化剂”作用的“氧化剂”。众所周知，它们是高度反应性的，并且经常挑战特征。 EPR是这种表征的理想工具，但是EPR仪器曾经是大型，繁琐的野兽，并且前期购买成本很高。最近，台式EPR镜头已经可用，可以以可承受的价格常规使用此类仪器。维护和持续的运营成本也可以忽略不计。因此，我们要求为台式EPR仪器提供资金，该工具将安置在McMaster University的核磁共振（NMR）设施中，并可供任何接受EPR培训的NMR设施的用户（其中​​包括化学和工程学院的研究生），以及使用名义上的用户费用结构。 Goward和Emslie小组都是活跃的研究团队，他们非常热衷于定期访问EPR为正在进行的项目提供的数据。在Emslie组中，有一个积极的研究计划，用于开发合并过渡金属的设计器分子，并用于制作用于微电子应用的薄膜。 Goward组的研究计划侧重于使用先进的固态NMR，在Li+和Na+电池阴极材料内的锂和钠离子传输特性的表征。最近，Goward组研究了一种新型的电池材料，即所谓的金属空气电池，其中超氧化物自由基是反应途径中的关键中间体。内部EPR光谱仪将为两个研究小组提供直接的好处，并很容易在此处描述的研究计划中培训和定期使用。