Elastic and Self-Healing Artificial Interphases for Beyond-Lithium-Ion Batteries

用于超锂离子电池的弹性和自愈人工界面

• 批准号: 2787954
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2787954
• 关键词: Elastic; Self; Healing; Artificial; Interphases

Lithium metal-based batteries constitute a promising battery technology, offering higher energy densities. However, their application is hindered by rapid degradation and potential safety issues. The degradation of electrode-electrolyte interfaces during cell operation is one of the major challenges in the emerging beyond-lithium-ion batteries. We aim to overcome these issues by controlling Li plating and stripping through the application of a coating that inhibits dendritic lithium formation.The project aims to develop a range of artificial interphases based on coating the electrodes with elastic and self-healing layers, aiming to reduce degradation. Our strategy is to pre-coat the electrodes with polymeric materials, which can adapt to volumetric changes and develop systems in which additives are combined with battery electrolytes to produce self-healing interphases. The programme involves synthesising a range of new phosphazene polymers, their deposition on battery electrodes, electrochemical stability and cyclability characterisation, and post-cycling chemical analysis of the interphases. This study will provide a potential fundamental solution to the problems of lithium metal battery degradation. In addition, the strategy which will be explored is a potentially general one that could enable more sustainable, high-energy, and efficient battery technologies.

锂金属基电池构成了一种有前途的电池技术，提供更高的能量密度。然而，它们的应用受到快速降解和潜在安全问题的阻碍。电池运行期间电极-电解质界面的退化是新兴的超锂离子电池的主要挑战之一。我们的目标是通过应用抑制树枝状锂形成的涂层来控制锂的电镀和剥离，从而克服这些问题。该项目旨在开发一系列基于弹性和自修复层涂层电极的人工界面，旨在减少降解。我们的策略是用聚合物材料预涂电极，这种材料可以适应体积变化，并开发出将添加剂与电池电解质结合以产生自修复界面的系统。该计划涉及合成一系列新的磷腈聚合物，它们在电池电极上的沉积，电化学稳定性和循环性能表征，以及界面的循环后化学分析。该研究将为锂金属电池的劣化问题提供一个潜在的根本解决方案。此外，将探索的战略是一个潜在的通用战略，可以实现更可持续，高能量和高效的电池技术。