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

实验室 X 射线计算机断层扫描成像协议,允许对各种环境下的电极材料演变进行原位研究

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

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.

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