Collaborative Research: Fundamental Study of Niobium Tungsten Oxide Anodes for High-Performance Aqueous Batteries

合作研究：高性能水系电池用铌钨氧化物阳极的基础研究

• 批准号: 2126178
• 负责人: Nikhil Koratkar
• 金额: $ 25.84万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2126178&HistoricalAwards=false
• 关键词: Collaborative; Research; Fundamental; Study; Niobium

Modern human society requires efficient, affordable and safe means for energy storage. Today, rechargeable lithium–ion batteries dominate the energy storage landscape from portable electronics to the rapidly expanding electric vehicles and electricity (grid) storage applications. However, current lithium-ion batteries suffer from safety and cost issues, primarily because of flammable, moisture-sensitive and expensive organic solvents used in the electrolytes. This project is aimed at replacing the organic solvent electrolyte with water, in a manner that does not compromise on battery performance (i.e., volumetric and gravimetric energy and power density). To accomplish this, the research team proposes to explore new classes of complex oxide (niobium tungsten oxide) materials that will be designed specifically for aqueous battery chemistries, enabling breakthrough improvements in volumetric energy and power density for the next generation of aqueous batteries. This work will contribute to low-cost, high-performance and safe aqueous batteries that are critical for large-scale energy storage. A number of fundamental science and engineering issues will be addressed in this project in order to enable the successful development of aqueous lithium-ion batteries with niobium tungsten oxide anodes. These include: (1) Benchmarking the chemical stability of niobium tungsten oxide anodes in aqueous (water-in-salt) electrolytes and establishing whether a protective coating is needed to improve stability; (2) Developing an in-depth understanding of aqueous electrolyte lithiation and delithation mechanism(s) in niobium tungsten oxide anodes; (3) Studying the interfacial chemistry and solid electrolyte interface that develops during battery operation; and (4) Compositional engineering (i.e., alloying and doping) of niobium tungsten oxide compounds to improve their gravimetric and rate performance. In this project, each of the above tasks will be addressed using a coupled experimental and computational approach, so that a deep and in-depth fundamental understanding of the underlying science can be achieved. Success will be assessed by an ability to optimize the niobium tungsten oxide composition and increase the operating voltage window of the aqueous battery, leading to a substantial increase in volumetric and gravimetric energy density. Success will also be determined by the team’s ability to enhance the high-rate performance of niobium tungsten oxides in an aqueous setting, leading to significant improvement in fast charging capability. Finally, the niobium tungsten oxide electrodes will be optimized and engineered to cycle in a stable and safe manner over thousands of charge-discharge steps with high coulombic efficiency.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.

现代人类社会需要有效，负担得起和安全的能力来存储能源。如今，可充电锂离子电池从便携式电子设备到快速扩展的电动汽车和电动（网格）存储应用中主导了能源存储景观。但是，当前的锂离子电池遭受了安全性和成本问题的困扰，主要是由于电子产品中使用的易燃，敏感和昂贵的有机解决方案。该项目的目的是用水代替有机溶剂电解质，而不会损害电池性能（即体积和粒度能量和功率密度）。为此，研究团队的提议探索了将专门为水电化学家设计的新型复杂氧化物（氧化物钨）材料，从而为下一代电池提供了体积能量和功率密度的突破。工作将有助于低成本，高性能和安全的水电池，这对于大规模储能至关重要。该项目将解决许多基本的科学和工程问题，以便能够成功开发使用Niobium Tungsten氧化物阳极的锂离子电池。其中包括：（1）基准测试水（水中水中）电解质中氧化钨氧化物的化学稳定性，并确定是否需要受保护的涂层以改善稳定性； （2）在氧化二氧化碳钨中，对水解片段和界定机制的深入了解； （3）研究电池操作过程中发生的界面化学和固体电解质界面； （4）氧化物钨化合物的组成工程（即合金和掺杂），以提高其重量和速率性能。在该项目中，将使用耦合的实验和计算方法来解决上述每个任务，以便可以深入介绍对基础科学的深入和深入的基本理解。成功将通过优化氧化物氧化钨的能力并增加水电池的工作电压窗口，从而评估成功，从而导致体积和粒度能量密度大幅增加。成功也将取决于团队在水性环境中提高niobium钨氧化物高速率性能的能力，从而显着提高了快速充电能力。最后，将优化和设计氧化物氧化物电极，以稳定且安全的方式循环，以高哥伦比克效率高，以稳定而安全。该奖项反映了NSF的法定任务，并被认为是通过基金会的智力优点和更广泛的影响审查的审查标准来通过评估来通过评估来获得的支持。

项目成果

Nanostructuring versus microstructuring in battery electrodes

• DOI: 10.1038/s41578-022-00454-9
• 发表时间: 2022-06-29
• 期刊: NATURE REVIEWS MATERIALS
• 影响因子: 83.5
• 作者: Jain, Rishabh;Lakhnot, Aniruddha Singh;Koratkar, Nikhil
• 通讯作者: Koratkar, Nikhil