Solid State NMR Studies of Disordered Solids-Ionic Conductors and Battery Materials

无序固体离子导体和电池材料的固态核磁共振研究

• 批准号: 0804737
• 负责人: Clare Grey
• 金额: $ 37.5万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0804737&HistoricalAwards=false
• 关键词: Solid; State; NMR; Studies; Disordered

This renewal award to SUNY Stony Brook by the Solid State Materials Chemistry program in the Division of Materials Research is aimed at understanding how electrode materials and anionic conductors function under operating conditions. With this project, Professor Grey will be building, testing and utilizing a NMR probe designed to acquire NMR spectra of functioning and intact lithium-ion batteries. Lithiated silicon anode materials, which are in metastable crystalline phase, will be studied using a combination of in and ex-situ 7Li and 29Si Magic Angle Spinning Nuclear Magnetic Resonance (NMR) spectroscopy and pair distribution function analysis of x-ray and neutron scattering. A second application involves the investigation of nanoparticles of layered materials such as LixCoO2, to determine the effect that size and morphology have on the various phase transitions that occur on charging this material, and the stability of the charged materials in the electrolyte. Nanoparticulate cathode materials are expected to have applications in high power batteries in, for example, hybrid electric or electric vehicles. The role of local structures on long-range anionic conductivity of electrode materials such as perovskite (such as LaGaO3) and browmillerite (such as Ba2In2O5) along with materials that can be viewed as intermediates between these end-number structures will also be studied as the second part of this study. Variable temperature NMR spectroscopy (e.g., 71Ga, 89Y NMR) of the B sites will be used to determine the coordination environments of the cations as a function of temperature, while 17¬O NMR spectroscopy will be used to determine the mobility of the oxide ions in different local environments of the electrode materials.The materials investigated by this program will have significant technological relevance for the design of the next generation of materials for use in Lithium ion batteries and fuel cells. The use of silicon as an anode material for a Lithium ion batteries is likely to be of great commercial interest. In addition, the project will provide fundamental insight in the design and development of the next generation of materials for energy sources, improved batteries and fuel cells. Graduate, undergraduate and high students working in this project through their research and classroom experiences will be trained in sophisticated techniques with an appreciation to their use to solve important technical problems.

通过材料研究部中的固态材料化学计划向SUNY Stony Brook的续签奖励旨在了解电极材料和阴离子导体如何在工作条件下运作。通过这个项目，Gray教授将建立，测试和利用旨在获取功能和完整赖德型离子电池的NMR光谱的NMR探针。将使用In和Ex-Situ 7li和29si Magic smagic旋转核磁共振（NMR）光谱和X射线和中性散射的配对分布函数的组合来研究岩性的硅阳极材料，该材料处于亚稳态的结晶相中。第二次应用涉及研究分层材料（例如lixcoo2）的纳米颗粒，以确定大小和形态对充电该材料的各种相变的影响以及电解质中带电材料的稳定性。预计纳米齿状阴极材料将在高电池中使用，例如混合动力或电动汽车。局部结构在电极材料（例如钙钛矿（例如Lagao3）和Browmillerite（例如BA2IN2O5）​​等电极材料（例如BA2IN2O5）​​的远程阴离子电导率上的作用，以及可以将这些最终数结构之间的中间体视为该研究的第二部分。 B位点的可变温度NMR光谱（例如71GA，89Y NMR）将用于确定阳离子的配位环境作为温度的函数，而17月17. nmr光谱将使用该材料的不同材料中的材料中的材料中的相关性来确定氧化物离子的迁移率。电池和燃料电池。将硅用作锂离子电池的阳极材料可能具有极大的商业利益。此外，该项目将提供基本的见解，以设计和开发下一代能源，改善电池和燃料电池的材料。通过他们的研究和课堂经验，研究生，本科生和高级学生将接受精致技术的培训，并感谢他们用来解决重要的技术问题。