刘美林教授团队EER最新综述︱固体氧化物燃料电池电极材料的原位和表面增强拉曼光谱研究

最新综述：以固体氧化物燃料电池（SOFC）为代表的下一代能源，能量转换效率高、污染物排放量少、可较灵活地应用各种燃料，并具有出色的模块性​​适用于分布式发电。作为电化学能量转换装置，SOFC的性能和可靠性对电极材料的催化活性和稳定性很敏感。然而迄今为止，由于对电极工艺机制的理解尚欠，电极材料和微结构的发展仍主要基于试错法。因此电极材料或功能异质界面的关键描述符/性质（尤其是原位或操作条件下）的确定，可为最佳电极材料和微结构的设计提供指导。拉曼光谱非常适合在操作条件下测绘电极表面上的化学物质。为了提高拉曼光谱对电极表面物质的敏感度，研究人员采用了表面增强拉曼光谱（SERS）技术，其中热稳定的SERS探针（例如Ag @ SiO₂核壳纳米颗粒）使原位/操作中分析成为可能。本综述总结了通过拉曼光谱技术研究SOFC电极材料的最新进展，包括早期碳沉积（焦化）、抗焦化阳极改性、硫中毒和阴极降解等；此外，还讨论了利用原位或操作条件下SERS对其他电化学表面和界面进行研究的未来前景。

In Situ and Surface-Enhanced Raman Spectroscopy Study of Electrode Materials in Solid Oxide Fuel Cells

Abstract:

Solid oxide fuel cells (SOFCs) represent next-generation energy sources with high energy conversion efficiencies, low pollutant emissions, good flexibility with a wide variety of fuels, and excellent modularity suitable for distributed power generation. As an electrochemical energy conversion device, the SOFC’s performance and reliability depend sensitively on the catalytic activity and stability of electrode materials. To date, however, the development of electrode materials and microstructures is still based largely on trial-and-error methods because of the inadequate understanding of electrode process mechanisms. Therefore, the identification of key descriptors/properties for electrode materials or functional heterogeneous interfaces, especially under in situ/operando conditions, may provide guidance for the design of optimal electrode materials and microstructures. Here, Raman spectroscopy is ideally suited for the probing and mapping of chemical species present on electrode surfaces under operating conditions. And to boost the sensitivity toward electrode surface species, the surface-enhanced Raman spectroscopy (SERS) technique can be employed, in which thermally robust SERS probes (e.g., Ag@SiO2 core–shell nanoparticles) are designed to make in situ/operando analysis possible. This review summarizes recent progresses in the investigation of SOFC electrode materials through Raman spectroscopic techniques, including topics of early stage carbon deposition (coking), coking-resistant anode modification, sulfur poisoning, and cathode degradation. In addition, future perspectives for utilizing the in situ/operando SERS for investigations of other electrochemical surfaces and interfaces are also discussed.

文章信息

文章将发表于 EER 期刊 2018 年第 1 卷第 3 期，详情请阅读全文，可免费下载。

文章题目：In Situ and Surface-Enhanced Raman Spectroscopy Study of Electrode Materials in Solid Oxide Fuel Cells

引用信息：Li, X., Blinn, K., Chen, D. et al. Electrochem. Energ. Rev. (2018). https://doi.org/10.1007/s41918-018-0017-9

关键词：固体氧化物燃料电池，拉曼光谱学，表面增强拉曼光谱学，原位，现场原位（操作中）  

全文链接：https://link.springer.com/article/10.1007/s41918-018-0017-9/fulltext.html

原文（扫描或长按二维码，识别后直达原文页面）：

作者简介

Xiaxi Li （first author） is a material scientist specialized in in situ characterization of SOFC electrodes and interfaces. Xiaxi obtained his bachelor degree from Tsinghua University (China), and worked in Prof. Meilin Liu’s group in Georgia Institute of Technology (U.S.) for his Ph.D. degree. During Xiaxi’s Ph.D. program, he adapted multiple novel characterization methods, including surface enhanced Raman spectroscopy, scanning probe microscopy, and pattern-electrode impedance spectroscopy, to mechanistic studies of SOFC electrode degradation processes and surface modifications.

Kevin Blinn received a B.S. in Ceramic and Materials Engineering from Rutgers University in 2007 and a Ph. D in Materials Science and Engineering in 2012 from the Georgia Institute of Technology. During his Ph. D work, his research interests were focused on improving solid oxide fuel cell technology through insights gained from spectroscopic analysis of chemical and electrochemical processes that take place at cell electrodes.

Dongchang Chen received his B.S. from University of Science and Technology of China in 2011 and Ph. D. from Georgia Institute of Technology in 2017. His research interest lies in fundamental understanding of chemical and electrochemical processes associated with energy storage and conversion using advanced spectroscopy and diffraction techniques, as well as developing knowledge-based design strategies for energy storage and conversion materials.

Meilin Liu （corresponding author）is the B. Mifflin Hood Chair, Regents’ Professor, and Associate Chair of the School of Materials Science and Engineering and Co-Director of the Center for Innovative Fuel Cell and Battery Technologies at Georgia Institute of Technology, Atlanta, Georgia, USA. He received his BS from South China University of Technology and both M.S. and Ph.D. from University of California at Berkeley. His research interests include design, fabrication, in situ/operando characterization, and modeling of membranes, thin films, and nanostructured electrodes in devices for energy storage and conversion, aiming at achieving rational design of materials and structures with unique functionalities.

期刊介绍

Electrochemical Energy Reviews (《电化学能源评论》，简称EER)，该期刊旨在及时反映国际电化学能源转换与存储领域的最新科研成果和动态，促进国内、国际的学术交流，设有专题综述和一般综述栏目。EER是国际上第一本专注电化学能源的综述性期刊。EER覆盖化学能源转换与存储所有学科，包括燃料电池，锂电池，金属-空气电池，超级电容器，制氢-储氢，CO₂转换等。

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创刊号在2018年3月正式出版。

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