Gao Ruoyang, Zhang Ling, Tao Fen, Wang Jun, Du Guohao, Xiao Tiqiao, Deng Biao
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019 Jialuo Road, Shanghai, 201800, People's Republic of China.
Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 239 Zhangheng Road, Shanghai, 201204, People's Republic of China.
Analyst. 2024 Aug 19;149(17):4506-4513. doi: 10.1039/d4an00705k.
Full-field transmission X-ray microscopy (TXM) in conjunction with X-ray absorption near edge structure (XANES) spectroscopy provides two-dimensional (2D) or three-dimensional (3D) morphological and chemical-specific information within samples at the tens of nanometer scale. This technique has a broad range of applications in materials sciences and battery research. Despite its extensive applicability, 2D XANES imaging is subject to the disadvantage of information overlap when the sample thickness is uneven. 3D XANES imaging combines 3D TXM with XANES to obtain 3D distribution information on chemical states. A 3D XANES imaging method has been established at the Shanghai Synchrotron Radiation Facility (SSRF) and has been used to characterize the structure and chemical state of commercial LiNiCoMnO (NCM, + + = 1) battery powder materials. The imaging results provide a visual representation of the 3D chemical state information of the particles with depth resolution, allowing for the direct observation of 3D nickel oxidation. This paper will describe in detail the data acquisition, data processing, quantification and visualization analysis of 3D XANES imaging.
全场透射X射线显微镜（TXM）与X射线吸收近边结构（XANES）光谱相结合，可在数十纳米尺度上提供样品内部的二维（2D）或三维（3D）形态和化学特异性信息。该技术在材料科学和电池研究中有广泛的应用。尽管其适用性广泛，但当样品厚度不均匀时，二维XANES成像存在信息重叠的缺点。三维XANES成像将三维TXM与XANES相结合，以获得化学状态的三维分布信息。一种三维XANES成像方法已在上海同步辐射装置（SSRF）上建立，并已用于表征商用LiNiCoMnO（NCM，++ = 1）电池粉末材料的结构和化学状态。成像结果提供了具有深度分辨率的颗粒三维化学状态信息的可视化表示，允许直接观察三维镍氧化。本文将详细描述三维XANES成像的数据采集、数据处理、定量和可视化分析。
