Nanoscale Design of Battery Electrodes for Optimized Performance and Lifetime

电池电极的纳米级设计可优化性能和使用寿命

• 批准号: 2445750
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2445750
• 关键词: Nanoscale; Design; Battery; Electrodes; Optimized

The role of electrode structure has been poorly explored in the literature, but nanostructured electrodes in principle offer many advantages including faster charging and higher energy capacity. They are however, limited by their large surface area which drives thermodynamic interfacial instability, and may create local 'hot spots' for unwanted reactions with the electrolyte. This project will explore strategies to overcome these challenges, whilst delivering the benefits of nano-architectured systems. In particular it will focus on the preparation of enhanced, designed interfaces for sodium-ion anodes, as part of a larger intended collaboration. The key activities will be:-Design. The development of pre-designed interfaces will prevent irreversible loss, stabilise small features, and improve understanding of electrode-electrolyte interfaces-Processing. Pre-grafting / reacting targeted interphases, using reductively driven chemistry (pioneered at Imperial) provides a route to produce stable materials-Characterisation. The stability of both electrode and interphase will be studied using in situ electrochemical cells developed by Imperial for use at National facilitiesIn the longer term, stabilised interfaces will enable a range of nanostructured electrode developments in the future, including-topologically optimised architectures to resolve conflicting ion/electron/mechanical demands-use of continuous, robust conductive framework aerogels to support new and/or challenging chemistries

文献中对电极结构的作用的探讨很少，但纳米结构电极原则上具有许多优点，包括更快的充电和更高的能量容量。然而，它们受到大表面积的限制，这会导致热力学界面不稳定，并且可能会产生局部“热点”，导致与电解质发生不需要的反应。该项目将探索克服这些挑战的策略，同时提供纳米架构系统的优势。特别是，作为更大的预期合作的一部分，它将专注于为钠离子阳极准备增强的、设计的界面。主要活动是：-设计。预先设计的界面的开发将防止不可逆的损失，稳定小特征，并提高对电极-电解质界面处理的理解。使用还原驱动化学（由帝国理工学院首创）对目标界面进行预接枝/反应，提供了生产稳定材料表征的途径。将使用帝国理工学院开发的用于国家设施的原位电化学电池来研究电极和相间的稳定性从长远来看，稳定的界面将使未来一系列纳米结构电极的开发成为可能，包括拓扑优化的架构来解决相互冲突的离子/电子/机械需求使用连续、坚固的导电框架气凝胶来支持新的和/或具有挑战性的化学物质