New Intercalation Materials

这个项目的目标是发现和表征能够作为客体-宿主反应宿主的新的过渡金属氧化物--插层化合物。关于材料的晶体结构和它们的化学和物理性质之间的关系，人们仍然知之甚少。我们已经开始更好地了解是什么控制了无机材料的反应，以及预测将形成什么化合物的方法。然而，无机/材料化学家仍然远远落后于能够绘制出合成序列的合成有机化学家。其中一个目标是加深对合成方法的理解，而策略是使用“软”化学条件，在这种条件下可以控制最终用于构建固体结构的构建块。一个主要的目标是发现新的具有开放结构的过渡金属氧化物，重点是钒氧化物、一些混合锰氧化物和铁氧化物/磷酸盐。这些氧化物形成了有趣的结构，能够插入一系列离子，包括锂，因此在先进的锂电池中使用和作为传感器是有兴趣的。我们的工作表明，它们可以形成一系列的形态，从大的单晶到纳米管和纤维。我们的工作还表明，它们的化学反应活性和物理性质取决于尺度(从纳米到宏观)和原子水平的成键。这样的氧化物材料在原则上也很容易定制，通过在主体晶格中进行取代或通过改变客体插层物种来提供所需的行为。正是这些令人兴奋的可能性鼓励学生参与发现过程，并激励这个项目发现和表征新的固体材料。%拟议活动的更广泛影响包括促进发现和理解，同时促进对下一代公民的科学教育。该项目将对本科生、研究生和博士后以及美国和国际上的同事产生影响。研究和教育将继续高度融合，从学生开始到毕业都将对他们产生重大影响。一门新的面向材料的普通化学课程正在开发中，该课程既适合工程、物理和地质专业的学生，也适合化学专业的学生。每年向30多名学生教授两门关于固体化学和固体研究技术的高级/研究生课程。研究实验室的创新正在被纳入本科无机/材料实验室，以便本科生使用最新的技术和材料。今年启动了新的材料科学研究生学位课程，来自不同学科和不同领域的学生将受到团队合作解决跨学科挑战的机会的影响。

This project targets the discovery and characterization of new transition metal oxides that are capable of acting as the host for guest-host reactions -- intercalation compounds. Little is still understood about the relationship between the crystalline structure of materials and their chemical and physical properties. We have begun to get a better understanding of what controls the reactions of inorganic materials, and ways to predict what compounds will be formed. However, the inorganic/materials chemist is still far behind the synthetic organic chemist who can map out a synthetic sequence. One goal is to further the understanding of synthetic approaches, and the strategy is to use 'soft' chemistry conditions where it is possible to control the building blocks that eventually are used for building the solid structure. A main goal is to discover new transition metal oxides with open structures, with an emphasis on vanadium oxides, some mixed manganese oxides and iron oxides/phosphates. These oxides form intriguing structures that are able to intercalate a range of ions, including lithium and are therefore of interest for use in advance lithium batteries, and as sensors. Our work has shown that they can form in a range of morphologies from large single crystals to nanotubes and fibers. Our work also shows that their chemical reactivity and physical properties depend on the scale (nano to macro) and on the atomic level bonding. Such oxide materials are also readily tailored in principle to give the desired behavior, either by substitution in the host lattice or by varying the guest intercalating specie. It is these exciting possibilities that encourage the student to participate in the discovery process, and motivate this project to discover and characterize new solid materials. %%%The broader impacts of the proposed activity include advancing discovery and understanding while at the same time promoting the scientific education of the next generation of citizens. This project will impact undergraduate students, graduate students and postdocs as well as colleagues in the US and internationally. Research and education will continue to be heavily integrated, significantly impacting students from their beginning years to graduation. A new materials-oriented general chemistry course adapted for Engineering, Physics and Geology students, as well as for chemistry majors is being developed. Two senior/graduate level courses on the Chemistry of Solids and Techniques for Studying Solids are taught every year to more than 30 students each. Innovations in the research laboratory are being incorporated into an undergraduate Inorganic/Materials Laboratory so that undergraduates are using the latest techniques and materials. This year a new graduate degree program in Material Science was started and students from a wide range of disciplines and diversities will be impacted by the opportunity of working together on teams to solve interdisciplinary challenges.