Selective Synthesis, Structures, and Properties of Oxynitride Materials

现代社会是由技术推动的，而新材料使现代技术成为可能。在这个项目中，在材料研究部固态和材料化学与陶瓷计划的支持下，詹姆斯·尼尔森教授和他的研究团队将推动材料合成科学的发展，以扩大历史上一直具有挑战性的材料家族。该项目的目标化学提供了用于能源采集、转换和存储的新型材料系统，这些应用将转向全固态锂离子和下一代锂离子电池，而不仅仅是汽车电气化和基于电网的能量存储等直接国家利益所需的锂离子电池。这项研究有可能通过发现高效照明、电子和催化的新材料来影响其直接范围以外的领域。该项目整合了一个影响广泛的教育推广计划，以开发和分发科学、技术、工程和数学(STEM)教育活动工具包，为全科罗拉多州的中学提供90分钟的功能材料化学领域的真实研究经验。技术摘要该项目由材料研究部的固态和材料化学和陶瓷计划支持，旨在有选择地合成新的氮氧基材料，并了解由此产生的结构/性能关系。对于已发现的异阴离子材料，具有两个阴离子的结果使得相对于它们的单一阴离子同系物具有增强的和独特的性质。然而，氧氮化物很难在化学计量控制下合成，特别是对于后来的过渡金属。该项目寻求通过利用固体材料化学合成科学的最新进展来扩大这类未被充分代表的氮氧化物基材料。具体地说，该项目1)在定向的探索性化学反应中合成新的氮氧化物材料，2)了解氮氧化物的结构和组成关系，特别是与阴离子无序有关的结构和组成关系，3)了解这些材料的独特的电化学和离子性质，以便在电化学能量存储方面有潜在的应用。该项目还通过开发和分发科学、技术、工程和数学(STEM)教育活动套件，在整个科罗拉多州提供教育推广，以促进中学课堂上90分钟的功能材料化学研究体验。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。

NON-TECHNICAL SUMMARY Modern society is enabled by technology, and new materials enable modern technologies. In this project, supported by the Solid State and Materials Chemistry and Ceramics programs in the Division of Materials Research, Prof. James Neilson and his research team will advance the science of materials synthesis to expand an underrepresented family of materials that have been historically challenging to synthesize. The targeted chemistries of this project present novel materials systems for applications in energy harvest, conversion, and storage that move toward all-solid-state lithium ion and next-generation, beyond Li-ion batteries needed for the immediate national interests of vehicle electrification and grid-based energy storage. This research has the potential to impact fields beyond its immediate scope by discovering new materials for efficient lighting, electronics, and catalysis. This project integrates a broadly impacting educational outreach program to develop and distribute Science, Technology, Engineering, and Mathematics (STEM) education activity kits that provide 90-minute authentic research experiences in the field of the chemistry of functional materials to secondary schools throughout Colorado.TECHNICAL SUMMARY This project, supported by the Solid State and Materials Chemistry and Ceramics programs in the Division of Materials Research, seeks to selectively synthesize new oxynitride-based materials and to understand the resulting structure/property relationships. For the heteroanionic materials that have been discovered, the result of having two anions enables enhanced and unique properties relative to their single-anion congeners. However, oxynitrides are hard to synthesize with stoichiometric control, particularly for later transition metals. This project seeks to expand this underrepresented class of oxynitride-based materials by employing recent advances in solid-state materials chemistry synthesis science. Specifically, this project 1) synthesizes new oxynitride materials in targeted, exploratory chemical reactions, 2) understands the structure and compositional relationships of oxynitrides, particularly as it pertains to anionic disorder, and 3) understands the unique electrochemical and ionic properties of these materials for potential applications in electrochemical energy storage. This project also 4) provides educational outreach throughout Colorado by developing and distributing Science, Technology, Engineering, and Mathematics (STEM) education activity kits that facilitate 90-minute research experiences on the chemistry of functional materials in secondary school classrooms.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.