CAREER: Pore-Scale Multiphase Mass Transfer in Porous Electrodes

职业：多孔电极中的孔隙级多相传质

• 批准号: 2329821
• 负责人: Xianglin Li
• 金额: $ 50万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-11-01 至 2025-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2329821&HistoricalAwards=false
• 关键词: CAREER; Pore; Scale; Multiphase; Mass

The rapidly growing markets for electric vehicle and unmanned aerial vehicle present a pressing need of high-power and high-energy electric supplies. While the lithium-ion battery is reaching its theoretical energy density limit, other technologies such as lithium-air battery, fuel cells, and super capacitors have great potential as the next generation energy storage and energy conversion technologies. The power density and energy density of these electrochemical technologies are often limited by the supply of reactants within porous electrodes. Clear understanding of transport phenomena within the pores is required to rationally design and engineer high-performance electrodes and devices. This project will apply advanced imaging technologies, customized electrode materials, and computational approaches to visualize and reconstruct pore-scale geometries of electrodes and develop new theories and tools to understand multiphase transport phenomena in porous electrodes. Results from this project will advance the development of environmentally friendly electric storage and conversion technologies. Research outcomes will be incorporated into summer camps, local STEM education platforms, and curriculum developments to educate and train local students with diverse backgrounds. The partnership with local industry will also nurture an educated professional workforce in the Kansas's metropolitan areas.Porous electrodes with high specific surface area are widely used in a variety of electrochemical systems such as batteries, fuel cells, super capacitors, flow batteries, and electrolysis technologies to provide sufficient reaction sites for electrochemical reactions. The goal of this project is to fundamentally understand pore-scale multiphase transport phenomena applicable to porous electrodes of electrochemical devices, considering spatial distributions of the solid matrix and filling fluids, and directly address key barriers to improved system-level performance (energy, power, efficiency etc.). In pursuit of the research goal, this project will integrate experiments and simulations to elucidate how the spatial distribution of each phase governs the pore-level multiphase transfer and system-level performance of porous electrodes. The clear understanding of the spatial phase distributions on transport phenomena is particularly important for sustaining performance in devices equipped with electrodes whose pore-size distributions and properties change over time. Fundamental knowledge on multiphase transport phenomena will fill a significant knowledge gap in porous-electrode engineering. Results from this project will directly benefit sustainable electricity production and storage technologies, including Li-ion batteries, metal-air batteries, fuel cells, super capacitors, redox flow batteries, and electrolysis technologies, to move the society toward a more sustainable future. This project is jointly funded by CBET Electrochemical Systems program and the Established Program to Stimulate Competitive Research (EPSCoR).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.

迅速发展的电动汽车和无人驾驶汽车市场迫切需要高功率和高能电动供应。尽管锂离子电池达到了其理论能量密度极限，但其他技术（例如锂空气电池，燃料电池和超级电容器）具有巨大的潜力，因为下一代能量存储和能量转换技术。这些电化学技术的功率密度和能量密度通常受到多孔电极内反应物的供应的限制。需要对毛孔内的运输现象进行清晰的了解，以合理设计和工程师的高性能电极和设备。该项目将采用高级成像技术，定制的电极材料和计算方法，以可视化和重建电极的孔尺度几何形状，并开发新的理论和工具，以了解多孔电极中的多相传输现象。该项目的结果将推动环保电气储存和转换技术的开发。研究成果将纳入夏令营，当地的STEM教育平台和课程发展，以教育和培训具有不同背景的当地学生。与本地工业的合作关系还将在堪萨斯州的大都市地区培养受过教育的专业劳动力。具有高特异性表面积的孔电极被广泛用于各种电化学系统中，例如电池，燃料电池，超级电容器，流量，流量电池和电解技术，以提供充分的电力反应反应。 该项目的目的是从根本上理解适用于电化学设备多孔电极的孔隙尺度多相传输现象，考虑实心基质和填充流体的空间分布，并直接解决了改善系统级别性能（能源，电源，效率等）的关键障碍。为了追求研究目标，该项目将集成实验和模拟，以阐明每个阶段的空间分布如何控制孔级多相传递和多孔电极的系统级性能。对传输现象的空间相分布的清晰了解对于维持配备电极的设备的性能尤为重要，其孔径尺寸分布和特性会随着时间而变化。关于多相传输现象的基本知识将填补多孔 - 电极工程的显着知识差距。该项目的结果将直接受益于可持续的电力生产和存储技术，包括锂离子电池，金属空气电池，燃料电池，超级电容器，氧化还原流量电池和电解技术，以使社会迈向更可持续的未来。该项目由CBET电化学系统计划共同资助和启发竞争研究的既定计划（EPSCOR）。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响审查标准的评估来通过评估来获得支持的。

项目成果

Binder-free Li-O 2 battery cathodes using Ni- and PtRu-coated vertically aligned carbon nanofibers as electrocatalysts for enhanced stability

使用 Ni 和 PtRu 涂层垂直排列碳纳米纤维作为电催化剂以增强稳定性的无粘合剂 Li-O 2 电池阴极

• DOI: 10.26599/nre.2023.9120055
• 发表时间: 2023
• 期刊: Nano Research Energy
• 作者: Hassan Zaidi, Syed Shoaib;Rajendran, Sabari;Sekar, Archana;Elangovan, Ayyappan;Li, Jun;Li, Xianglin
• 通讯作者: Li, Xianglin

Incorporation of Novel Graphene Nanosheet Materials as Cathode Catalysts in Li–O2 Battery

新型石墨烯纳米片材料作为锂氧气电池阴极催化剂的应用

• DOI: 10.1115/1.4056937
• 发表时间: 2023
• 期刊: Journal of Electrochemical Energy Conversion and Storage
• 影响因子: 2.5
• 作者: Hassan Zaidi, Syed Shoaib;Sigdel, Shusil;Sorensen, Christopher M.;Kwon, Gibum;Li, Xianglin
• 通讯作者: Li, Xianglin