CAREER: Atomic-Scale Origins of Fast Ion Conduction through Complex Solid-State Electrochemical Interfaces

职业：通过复杂固态电化学界面快速离子传导的原子尺度起源

• 批准号: 2239598
• 负责人: Kai He
• 金额: $ 66.7万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-03-01 至 2028-02-29
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2239598&HistoricalAwards=false
• 关键词: CAREER; Atomic; Scale; Origins; Fast

NON-TECHNICAL DESCRIPTION: Ceramic materials are essential for clean energy technologies. Specifically, the next-generation solid-state batteries using ceramics as a medium to conduct ions between positive and negative electrodes can improve the safety and energy density over today’s conventional liquid-based lithium-ion battery technology. However, the ability of ion transport in ceramics is not high enough to make batteries charge faster for use in electric vehicles and high-power applications. To solve this critical issue, this project aims to study how the material’s structures and interfaces affect the ion conduction under complex electrochemical conditions. Advanced electron microscopy techniques are used to visualize these fundamental processes on the nanometer scale. This is important because the obtained scientific knowledge can be used as design rules to guide the development of viable energy storage technologies, enhancing the energy security and sustainability. This project provides training on microscopy and analytical tools for diverse students at all levels and promotes broader participation of women and underrepresented minorities in the workforce development. The education and outreach program designed “for understanding nanotechnology and materials experience (FunMe)” offers summer research interns and extracurricular activities for undergraduate and K-12 students by leveraging the minority-serving programs partnered with local and nationwide initiatives.TECHNICAL DETAILS: Solid-state electrolytes with high ionic conductivity and interfacial stability are vital and urgently needed to enable safe and high-performance all-solid-state batteries for the next generation energy storage technology. This CAREER project aims to fundamentally understand the atomic-scale origin of fast lithium-ion conduction through complex electrochemical interfaces of ceramic solid-state electrolytes. Specifically, the effects of grain boundary microstructure, compositional heterogeneity, and space charge induced electrostatic potential on the ionic conductivity as well as the correlated electro-chemo-mechanical interface degradation mechanism will be elucidated using in situ transmission electron microscopy integrated with operando electrochemical impedance spectroscopy under air-free environments. The gained new knowledge will provide design principles for microstructural optimization and interfacial engineering to improve the cell performance and stability. This research will have multifaceted impacts on the advancements of fundamental theories, microscopy methodologies, and technically viable all-solid-state batteries for energy-intensive applications. The integrated education and outreach program offers a unique microscopy-centric STEM pipeline to engage graduate, undergraduate, and K-12 students, enhance broader participation of women and underrepresented minorities, and support their career development and work readiness through interrelated teaching, mentoring, training, and outreach activities.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.

非技术描述：陶瓷材料对于清洁能源技术至关重要。具体来说，使用陶瓷作为正负极之间传导离子的介质的下一代固态电池可以比当今传统的液基电池提高安全性和能量密度。然而，陶瓷中的离子传输能力不足以使电池在电动汽车和高功率应用中充电更快。为了解决这一关键问题，该项目旨在研究如何实现锂离子电池技术。材料的结构和界面影响复杂电化学条件下的离子传导，先进的电子显微镜技术用于在纳米尺度上可视化这些基本过程，这很重要，因为获得的科学知识可以用作设计规则来指导可行的能量的开发。该项目为各级不同学生提供显微镜和分析工具培训，并促进妇女和代表性不足的少数群体更广泛地参与劳动力发展。材料体验（FunMe）”利用与当地和全国性计划合作的少数族裔服务项目，为本科生和 K-12 学生提供暑期研究实习生和课外活动。技术细节：具有高离子电导率和界面稳定性的固态电解质至关重要迫切需要为下一代储能技术提供安全、高性能的全固态电池。该职业项目旨在从根本上了解快速反应的原子尺度起源。锂离子通过陶瓷固态电解质复杂电化学界面的传导具体来说，晶界微观结构、成分异质性和空间电荷诱导静电势对离子电导率的影响以及相关的电化学机械界面退化机制。将在无空气环境下使用原位透射电子显微镜与操作电化学阻抗谱相结合来阐明这一点，所获得的新知识将为微观结构优化和界面提供设计原理。这项研究将对能源密集型应用的基础理论、显微镜方法和技术上可行的全固态电池的进步产生多方面的影响。以 STEM 为中心的渠道，吸引研究生、本科生和 K-12 学生，提高女性和代表性不足的少数族裔的更广泛参与，并通过相互关联的教学、指导、培训和外展活动支持他们的职业发展和工作准备。该奖项通过使用基金会的智力价值和更广泛的影响审查标准进行评估，NSF 的法定使命被认为值得支持。

项目成果

Elucidating Phase Transformation and Surface Amorphization of Li 7 La 3 Zr 2 O 12 by In Situ Heating TEM

通过原位加热 TEM 阐明 Li 7 La 3 Zr 2 O 12 的相变和表面非晶化

• DOI: 10.1002/smll.202304799
• 发表时间: 2023-10
• 期刊: Small
• 影响因子: 13.3
• 作者: Zheng, Hongkui;Xu, Mingjie;He, Kai
• 通讯作者: He, Kai

Reliable Microscopy and Microanalysis Strategies for Real-World Batteries

适用于实际电池的可靠显微镜和微量分析策略

• DOI: 10.1093/micmic/ozad067.049
• 发表时间: 2023-07
• 期刊: Microscopy and Microanalysis
• 影响因子: 2.8
• 作者: He; Kai
• 通讯作者: Kai