Dynamic Transmission Electron Microscopy of Next Generation Li-ion Batteries for Large-Scale Energy Storage

用于大规模储能的下一代锂离子电池的动态透射电子显微镜

• 批准号: 2269410
• 金额: --
• 依托单位: University of York
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2269410
• 关键词: Dynamic; Transmission; Electron; Microscopy; Next

Whilst renewable sources of energy (e.g. wind and solar) are making an increasing contribution to immediate global electricity demand, there is a need to store energy for use on demand. These demands include transportation, night time usage and the need to balance load across the power grid. The need for large-scale storage of intermittent sources of renewable energy and the envisaged rapid deployment of electric powered vehicles has significantly stimulated battery research. Whilst Li ion batteries (LIBs) are ubiquitous for consumer electronics with a relatively short lifespan, there is a major challenge to develop battery technologies with > 10 year lifetime that can be rapidly charged, do not degrade after charge/discharge cycles, and use sustainable and safe materials. The primary aim of this proposal is to gain fundamental understanding, at an atomistic level, of the ion dynamics in nanoporous oxide films, which can be used as the anode or cathode of a battery, and to study the processes that limit their performance. To gain direct atomistic structural information, this project will use state-of-the-art time-resolved transmission electron microscopy. Structural changes and ion mobility will be tracked on the second timescale under electrical bias to mimic a functioning battery. In addition, the electron microscope at York has a unique capability to examine materials under liquid or gaseous environments which will also allow the investigation of potential failure mechanisms arising from changes in temperature and exposure to air. The project is a collaboration between chemistry and physics with ample opportunity to gain cross-disciplinary knowledge of experimental and theoretical methodologies.

虽然可再生能源（例如风能和太阳能）对全球即时电力需求的贡献越来越大，但仍需要储存能源以供按需使用。这些需求包括运输、夜间使用以及平衡电网负载的需求。对间歇性可再生能源的大规模储存的需求以及电动车辆的快速部署大大刺激了电池研究。虽然锂离子电池（LIB）普遍用于具有相对短寿命的消费电子产品，但开发具有> 10年寿命的电池技术存在重大挑战，该电池技术可以快速充电，在充电/放电循环后不会降解，并且使用可持续和安全的材料。该提案的主要目的是在原子水平上对纳米多孔氧化物薄膜中的离子动力学进行基本了解，该薄膜可用作电池的阳极或阴极，并研究限制其性能的过程。为了获得直接的原子结构信息，该项目将使用最先进的时间分辨透射电子显微镜。将在电偏压下在第二时间尺度上跟踪结构变化和离子迁移率，以模拟功能电池。此外，约克的电子显微镜具有在液体或气体环境下检查材料的独特能力，这也将允许调查温度变化和暴露于空气中引起的潜在失效机制。该项目是化学和物理之间的合作，有充分的机会获得实验和理论方法的跨学科知识。