Selective Synthesis, Structures, and Properties of Oxynitride Materials

技术成就了现代社会，新材料成就了现代技术。在该项目中，由材料研究部固态和材料化学以及陶瓷项目支持，James Neilson教授和他的研究团队将推进材料合成科学，以扩大历史上一直具有挑战性的未被充分代表的材料家族。该项目的目标化学物质为能源收集、转换和存储提供了新型材料系统，这些材料系统将朝着全固态锂离子和下一代锂离子电池的方向发展，而不仅仅是汽车电气化和基于电网的能源存储等国家利益所需要的锂离子电池。这项研究有潜力通过发现高效照明，电子和催化的新材料来影响其直接范围之外的领域。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，为科罗拉多州的中学提供90分钟功能材料化学领域的真实研究体验。该项目由材料研究部固态与材料化学和陶瓷项目支持，旨在选择性地合成新的氮化氧基材料，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其相对于其单阴离子同系物具有增强和独特的性能。然而，氮氧化物很难用化学计量控制合成，特别是后期过渡金属。该项目旨在通过采用固态材料化学合成科学的最新进展，扩大这类代表性不足的氮化氧基材料。具体来说，该项目1)在有针对性的、探索性的化学反应中合成新的氮化氧材料；2)了解氮化氧的结构和组成关系，特别是与阴离子紊乱有关的结构和组成关系；3)了解这些材料独特的电化学和离子性质，以潜在地应用于电化学储能。该项目还通过开发和分发科学、技术、工程和数学（STEM）教育活动工具包，在整个科罗拉多州提供教育推广，这些活动工具包促进了中学课堂上90分钟功能材料化学的研究体验。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值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.