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。具体而言，使用陶瓷作为介质进行离子的下一代固态电池可以提高当今常规液体基锂离子电池技术的安全性和能量密度。但是，陶瓷中的离子传输的能力不足以使电池充电速度更快用于电动汽车和高功率应用。为了解决这个关键问题，该项目旨在研究材料的结构和界面如何在复杂的电化学条件下影响离子传导。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，以指导可行的能源存储技术的开发，增强能源安全和可持续性。该项目为各个级别的潜水员学生提供了有关显微镜和分析工具的培训，并促进了妇女和代表性不足的少数民族在劳动力发展中的广泛参与。教育和宣传计划“用于了解纳米技术和材料经验（FUNME）”，通过利用与本地和全国性计划合作的少数族裔服务计划，为本科和K-12学生提供夏季研究实习生和课外活动。下一代储能技术的全稳态电池。这个职业项目旨在通过复杂的陶瓷固态电解质的复杂电化学接口来从根本上了解快速锂离子传导的原子尺度起源。具体而言，晶粒边界微观结构，复合异质性和空间电荷诱导的静电电位对离子电导率以及相应的电化学界面降解机制的影响，将使用现场电子显微镜与经营电化学的电化学障碍环境集成。获得的新知识将为微观结构优化和界面工程提供设计原理，以改善细胞性能和稳定性。这项研究将对基本理论，显微镜方法和技术可行的全稳态电池的进步产生多方面的影响。整合的教育和外展计划提供了独特的以显微镜为中心的STEM管道，以吸引研究生，本科生和K-12学生，增强妇女和代表性不足的少数群体的更广泛的参与，并通过相互关联的教学，心理，培训，培训和外展活动来支持其职业发展和工作准备。 标准。

项目成果

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
• 期刊: Microscopy and Microanalysis
• 影响因子: 2.8
• 作者: He, Kai