实验室X射线计算机断层扫描成像协议，可对各种环境中电极材料的演变进行原位研究。

Laboratory X-ray computed tomography imaging protocol allowing the operando investigation of electrode material evolution in various environments.

作者信息

Dzięcioł Krzysztof, Durmus Yasin Emre, Tempel Hermann, Kungl Hans, Bauer Alexander, Eichel Rüdiger-A

机构信息

Fundamental Electrochemistry (IEK-9), Forschungszentrum Jülich GmbH, Jülich, Germany.

Institut für Materialien und Prozesse für elektrochemische Energiespeicher und wandler, RWTH Aachen University, 52074 Aachen, Germany.

出版信息

iScience. 2023 Jun 14;26(7):107097. doi: 10.1016/j.isci.2023.107097. eCollection 2023 Jul 21.

DOI:10.1016/j.isci.2023.107097

PMID:37416465

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10320505/

Abstract

A robust imaging protocol utilizing laboratory XCT is presented. Hybrid 2D/3D imaging at different scales with real-time monitoring allowed to assess, in operation, the evolution of zinc electrodes within three environments, namely alkaline, near-neutral, and mildly acidic. Different combinations of currents were used to demonstrate various scenarios exhibiting both dendritic and smooth deposition of active material. Directly from radiograms, the volume of the electrode and therefore its growth/dissolution rate was estimated and compared against tomographic reconstructions and theoretical values. The protocol combines simplistic cell design with multiple three-dimensional and two-dimensional acquisitions at different magnifications, providing a unique insight into electrode's morphology evolution within various environments.

摘要

本文介绍了一种利用实验室X射线计算机断层扫描（XCT）的强大成像协议。通过不同尺度的二维/三维混合成像和实时监测，可以在运行过程中评估锌电极在碱性、近中性和微酸性三种环境中的演变情况。使用不同的电流组合来展示各种呈现活性物质树枝状和平滑沉积的场景。直接从射线照片中估计电极的体积，进而得出其生长/溶解速率，并与断层扫描重建结果和理论值进行比较。该协议将简单的电池设计与不同放大倍数下的多次三维和二维采集相结合，为深入了解电极在各种环境中的形态演变提供了独特视角。