同步辐射吸收光谱技术在NiCo2O4电极材料储能机理研究中的应用-中国材料进展

文章信息/Info

Title:: Application of Synchrotron Radiation Absorption Spectroscopy in Energy Storage Mechanism Research of NiCo2O4 Electrode Materials

作者:: 齐颖; 胡小雨; 万初斌; 1. 北京市实验室服务保障中心，北京 101100 2. 浙江大学材料科学与工程学院，浙江杭州 310027 3. 北京科技大学数理学院，北京 100083

Author(s):: QI Ying; HU Xiaoyu; WAN Chubin; 1. Laboratory Service Guarantee Center Beijing，Beijing 101100 2. School of Materials Science and Engineering, Zhejiang University，Hangzhou 310027 et al.

Keywords:: electrode materials; NiCo2O4; synchrotron radiation; microscale; XAFS spectroscopy

摘要:: 同步辐射X射线吸收精细结构（X-ray absorption fine structure，XAFS）光谱是一种基于同步辐射光源的强大分析技术，用于研究材料局域原子或电子结构，XAFS技术广泛应用于物理学、材料学、化学、环境学等领域。整理了近些年XAFS技术在超级电容器NiCo2O4电极材料研究方面的应用，主要内容包括：① X射线吸收近边结构（X-ray absorption near edge structure, XANES）光谱在确定元素价态、电荷转移上的应用；② 扩展X射线吸收精细结构（extended X-ray absorption fine structure, EXAFS）光谱在确定原子配位结构上的应用；③ 原位XAFS在确定电化学反应机理上的应用。希望帮助科研人员从微观结构角度对NiCo2O4材料电化学储能机理有更深入的理解，促进NiCo2O4电极材料和超级电容器的发展。

Abstract:: X-ray absorption fine structure (XAFS) spectroscopy is a powerful analytical technique based on synchrotron radiation sources, commonly being used to study the local atomic or electronic structure of materials. The XAFS technique finds wide applications in physics, materials science, chemistry, environmental science, and other fields. This article summarizes the recent applications of XAFS technique in the research of electrode materials for supercapacitors,focusing on NiCo2O4 electrode materials. The main contents include: ① the application of XANES in determining the oxidation state of elements and charge transfer; ② the application of EXAFS in determining atomic coordination structures; ③ the application of in-situ XAFS in determining the electrochemical reaction mechanism. Hope this review help researchers gain a deeper understanding for the electrochemical energy storage mechanism of NiCo2O4 from a microstructural perspective, and promote the development of NiCo2O4 electrode materials and capacitors.