In-Operando Studies of Electrochemical Materials and Processes

电化学材料和过程的现场研究

• 批准号: RGPIN-2018-03725
• 负责人: Roberts, Edward
• 金额: $ 3.35万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=711971
• 关键词: Operando; Studies; Electrochemical; Materials; Processes

Electrochemical devices are used in a range of important applications, including batteries, water treatment, chemical production, and emerging energy conversion technologies such as water splitting and fuel cells. Our goal is to understand how the intermediate length scales in these devices, from around 100 nm to 1 mm, affect device performance. These often neglected meso-scales bridge the gap between the atomic / nano-scale and device scales, and are critical to technology performance as they connect the surface processes to the bulk electrolyte. These meso-scale processes are influenced by transport processes as well as the structure of electrode materials at these length scales. Understanding the processes occurring at these length scales will thus enable us to design materials and devices for enhanced and optimised performance. In combination with multi-scale modelling, the use of in-operando techniques can provide unique insights into the processes occurring in these devices. Intermediate length scales from around 100 nm to ca. 1 mm are accessible to relatively low cost, robust microscopy techniques, where samples can be under ambient conditions and are thus well suited to in-operando studies. In particular, confocal fluorescence and Raman microscopy will be used to observe the flow, transport, and species concentration distributions in operating devices. These techniques can be used to map the behaviour in both space and time, providing detailed quantitative information on the meso-scale processes in operating devices. The research will drive innovation in the design of wastewater treatment and energy conversion and storage technologies, with improved performance and reduced costs. These technologies will benefit industry and society in Canada by reducing the cost and environmental impact of wastewater treatment processes, and enabling renewable and clean energy solutions. The long-term goal of the project is to determine the relationship between the processes occurring at intermediate length scales (from a around 100 nm to 1 mm), and the performance of electrochemical cells for water treatment and energy storage applications. Specific Research objectives include: To exploit optical spectroscopy techniques for in-operando studies of processes occurring at meso-scales in electrochemical cells. To apply these techniques to water treatment (adsorption / electrochemical regeneration, electrocoagulation), and energy storage (flow batteries) technologies. To identify meso-scale processes that limit device performance in these electrochemical devices. To develop new materials, innovative cell designs and operating conditions for water treatment and energy storage applications.

电化学设备用于一系列重要的应用，包括电池，水处理，化学生产以及新兴的能量转换技术，例如水分流和燃料电池。我们的目标是了解这些设备中的中间长度从100 nm到1毫米的尺度如何影响设备性能。这些经常被忽略的中尺度弥合了原子 /纳米尺度和设备尺度之间的差距，并且对于技术性能至关重要，因为它们将表面过程连接到大量电解质。这些中尺度的过程受这些长度尺度下的传输过程以及电极材料的结构的影响。因此，了解在这些长度尺度上发生的过程将使我们能够设计材料和设备以增强和优化的性能。 结合多尺度建模的结合，Operando In-Operando技术的使用可以为这些设备中发生的过程提供独特的见解。中间长度从约100 nm到CA的尺度。 1毫米可用于相对较低的成本，可靠的显微镜技术，其中样品可以处于环境条件下，因此非常适合于奥塞兰多的研究。特别是，共聚焦荧光和拉曼显微镜将用于观察操作设备中的流，传输和物种浓度分布。这些技术可用于在时空和时间上绘制行为，从而在操作设备中提供有关中尺度过程的详细定量信息。 这项研究将推动废水处理，能源转换和存储技术的设计，并提高性能和成本降低。这些技术将通过降低废水处理过程的成本和环境影响，并实现可再生能源解决方案的成本和环境影响，从而使加拿大的行业和社会受益。 该项目的长期目标是确定在中间长度尺度（从约100 nm到1 mm）处发生的过程，以及用于水处理和能源储存应用的电化学细胞的性能。 具体研究目标包括： 为了利用光谱技术来用于对电化学细胞中介质量表发生的过程的operando研究。 将这些技术应用于水处理（吸附 /电化学再生，电凝）和能量储能（流量电池）技术。 确定在这些电化学设备中限制设备性能的中尺度过程。 为了开发新材料，创新的细胞设计和水处理和能源存储应用的工作条件。