CAREER: Decoupling electrodeposition from corrosion for precise tuning of metal deposits in high energy batteries

职业：将电沉积与腐蚀解耦，以精确调节高能电池中的金属沉积

• 批准号: 2143677
• 负责人: Yuzhang Li
• 金额: $ 56.25万
• 依托单位: University of California-Los Angeles
• 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: 2022-07-01 至 2027-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2143677&HistoricalAwards=false
• 关键词: CAREER; Decoupling; electrodeposition; corrosion; precise

Electrochemical deposition of reactive metals is the central process in several important clean energy technologies, including high-energy batteries using metallic anodes. Understanding and engineering these electrochemical systems are critical to achieving the Nation’s goal of a zero-carbon emissions future, where grid-scale energy storage can facilitate renewable yet intermittent sources of green energy (e.g., solar, wind) and the transportation sector is increasingly electrified. The project’s objectives to understand and engineer metal electrodeposition for energy storage will generate broad impact for future technologies that benefit society, including electric vehicles, electric-powered flight, and grid-scale energy storage. The project’s education and outreach activities will promote scientific discoveries to the broader community by leveraging informal settings. Such informal settings have been shown to be particularly effective learning environments for underrepresented students in STEM, for whom equitable access to educational opportunities will be provided through the project’s activities. For example, the researcher's YouTube channel will disseminate the project’s results to the general public in an engaging way, raising awareness for the importance of energy research and exciting the future generation of young scientists and engineers. The project’s integrated research and educational plan will lead to energy-dense lithium metal batteries that bring the US closer to achieving decarbonization goals, expand the number of underrepresented students pursuing STEM, and enable a diverse and globally competitive US workforce.This fundamental research project will investigate the nanoscale mechanism of Li metal electrodeposition; the current understanding of which is complicated by the simultaneous formation of a surface corrosion film, the solid electrolyte interphase (SEI). A deeper understanding of these processes will enable high-energy batteries capable of extreme fast charging. The objective is to bridge this gap in understanding by decoupling metal electrodeposition from SEI film formation to study each process independently. The project’s approach will use ultramicroelectrode geometries to enable ultrafast electrodeposition current densities that can outpace electrolyte decomposition rates. State-of-the-art cryogenic electron microscopy techniques will preserve and image the nanoscale interfaces that form. The project’s objectives are to (1) understand and tune electrodeposition morphologies decoupled from surface corrosion/SEI formation, (2) reveal the reaction kinetics of the SEI film, and (3) use these insights to engineer efficient high-energy batteries capable of fast charging. This approach is distinct from past work, which could not decouple these two processes and study them separately from each other. By providing the first images of how Li grows intrinsically without the influence of a corrosion film and quantifying the film’s reaction kinetics, the project’s results will provide significant insights into precisely tuning Li deposition morphology.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.

反应金属的电化学沉积是几种重要的清洁能源技术的中心过程，包括使用金属阳极的高能量电池。理解和工程这些电化学系统对于实现零碳排放的未来目标至关重要，在该目标中，网格尺度的储能可以固定可再生但间歇性的绿色能源来源（例如太阳能，风能）和运输部门越来越多地电气化。该项目了解和设计用于存储能源的金属电沉积的目标将对有利于社会的未来技术产生广泛的影响，包括电动汽车，电动飞行和网格尺度储能。该项目的教育和外展活动将通过利用非正式环境来促进更广泛的社区的科学发现。对于STEM中代表性不足的学生来说，这种非正式环境已被证明是特别有效的学习环境，通过项目的活动将为他们提供公平的教育机会。例如，研究人员的YouTube频道将以引人入胜的方式将项目的结果传播给公众，从而提高人们对能源研究重要性的认识，并激发了未来的年轻科学家和工程师的未来一代。该项目的综合研究和教育计划将导致能量浓密的锂金属电池，使美国对这些过程的更深入了解将使能够具有极端快速充电的高能电池。目的是通过将金属电沉积从SEI膜形成分解以独立研究每个过程来弥合这一差距。该项目的方法将使用超大型电极几何形状来实现超快电沉积电流密度，从而超过空间电解质分解速率。最先进的低温电子显微镜技术将保留并成像形成的纳米级界面。该项目的目标是（1）理解和调整电死刑形态与表面腐蚀/SEI形成解耦，（2）揭示了SEI膜的反应动力学，（3）使用这些见解来工程师有效的高能电池，能够快速充电。这种方法与过去的工作不同，这无法使这两个过程分离并彼此分开研究。通过提供第一批图像，说明Li在没有腐蚀膜的影响的情况下在本质上生长并量化了胶卷的反应动力学，该项目的结果将为精确调整Li沉积形态提供重大见解。该奖项反映了NSF的法定任务，并通过使用基金会的知识优点和广泛的criperia criperia criperia criperia criperia criperia criptialia revalluation the Collectory Mission。

项目成果

Ultrafast deposition of faceted lithium polyhedra by outpacing SEI formation

• DOI: 10.1038/s41586-023-06235-w
• 发表时间: 2023-08
• 期刊: Nature
• 影响因子: 64.8
• 作者: Xintong Yuan;Bo Liu;M. Mecklenburg;Yuzhang Li

Imaging of nitrogen fixation at lithium solid electrolyte interphases via cryo-electron microscopy

通过冷冻电子显微镜对锂固体电解质界面的固氮成像

• DOI: 10.1038/s41560-022-01177-5
• 发表时间: 2023
• 期刊: Nature Energy
• 影响因子: 56.7
• 作者: Steinberg, Katherine;Yuan, Xintong;Klein, Channing K.;Lazouski, Nikifar;Mecklenburg, Matthew;Manthiram, Karthish;Li, Yuzhang
• 通讯作者: Li, Yuzhang