Understanding the critical role of interfaces and surfaces in energy materials

了解界面和表面在能源材料中的关键作用

• 批准号: EP/R002010/1
• 负责人: Stephen Skinner
• 金额: $ 166.27万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FR002010%2F1
• 关键词: Understanding; critical; role; interfaces; surfaces

'Energy materials' encompass a wide range of technologies, ranging from thermoelectrics to fuel cells, batteries, photovoltaics and magnetocalorics, among others. Many of these energy materials are developed as multi-component solid state devices and these devices inherently possess a number of electrochemically active interfaces. It is these interfaces, e.g. solid/solid, liquid/solid or gas/solid, that control the function of the device, and are typically the source of degradation. Many current techniques used to analyse these devices and their components rely on idealised systems in high vacuum environments to gain information on the near surface chemistry. This necessitates the use of post-mortem operation analysis and clearly represents a significant mismatch from the conditions under which devices operate. Increasingly it is acknowledged that in-operando measurements are required, but that the measurements are themselves difficult and demanding. It is our intention to develop expertise with in-operando characterisation of energy materials. This will build on our existing expertise and capability in surface analysis and in-situ measurements. As an example, a fuel cell operating at 823K will be subjected to temperature gradients, cation segregation, potential gradients, poisoning and chemical changes induced by these conditions, all of which are inter-related, but separating the individual contributions has so far proved impossible. Similar issues involving the interface and surface chemistry of solid state batteries, permeation membranes and co-electrolysers will also be addressed using these techniques. By developing in-operando correlative characterisation we aim to deconvolute these processes and provide detailed mechanistic understating of the critical processes in a range of energy systems.

“能源材料”涵盖了广泛的技术，从热电到燃料电池、电池、光致发光和磁热等。这些能量材料中的许多被开发为多组分固态装置，并且这些装置固有地具有许多电化学活性界面。正是这些界面，例如固体/固体、液体/固体或气体/固体，控制装置的功能，并且通常是降解的来源。目前用于分析这些设备及其组件的许多技术依赖于高真空环境中的理想化系统，以获得近表面化学信息。这需要使用事后操作分析，并且清楚地表示与器械操作条件的显著不匹配。人们越来越认识到，需要进行术中测量，但测量本身就很困难，要求也很高。我们的目的是发展能源材料的操作特性的专业知识。这将建立在我们现有的表面分析和现场测量的专业知识和能力之上。例如，在823 K下工作的燃料电池将受到温度梯度、阳离子偏析、电势梯度、中毒和由这些条件引起的化学变化的影响，所有这些都是相互关联的，但迄今为止证明不可能分离各个贡献。涉及固态电池、渗透膜和共电解器的界面和表面化学的类似问题也将使用这些技术来解决。通过开发在operando相关表征，我们的目标是去卷积这些过程，并提供详细的机械understating的关键过程中的一系列能源系统。

项目成果

Effects of nitridation on SiC/SiO$_2$ structures studied by hard X-ray photoelectron spectroscopy

硬X射线光电子能谱研究氮化对SiC/SiO$_2$结构的影响

• DOI: 10.48550/arxiv.1912.06592
• 发表时间: 2019
• 作者: Berens J

Generation of plasmonic hot carriers from d-bands in metallic nanoparticles

从金属纳米粒子中的 d 带产生等离子体热载流子

• DOI: 10.48550/arxiv.1912.00460
• 发表时间: 2019
• 作者: Castellanos L

Experimental determination of Li diffusivity in LLZO using isotopic exchange and FIB-SIMS

• DOI: 10.1088/2515-7655/abe2f7
• 发表时间: 2021-07-01
• 期刊: JOURNAL OF PHYSICS-ENERGY
• 影响因子: 6.9
• 作者: Brugge, Rowena H.;Chater, Richard J.;Aguadero, Ainara
• 通讯作者: Aguadero, Ainara

Energy level alignment at semiconductor-water interfaces from atomistic and continuum solvation models

• DOI: 10.1039/c7ra08357b
• 发表时间: 2017-01-01
• 期刊: RSC ADVANCES
• 影响因子: 3.9
• 作者: Blumenthal, Lars;Kahk, Juhan Matthias;Lischner, Johannes
• 通讯作者: Lischner, Johannes