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

Dzięcioł, Krzysztof; Durmus, Yasin Emre; Tempel, Hermann; Kungl, Hans; Bauer, Alexander; Eichel, Rüdiger‐A.

doi:10.1016/j.isci.2023.107097

Cited by 3 publications

(2 citation statements)

References 56 publications

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“…The experiment was controlled by a custom script reading information from potentiostat and triggering the scans automatically if the current value remained near zero for longer than 1 min. It was achieved thanks to the exposed application programming interface of the Versa scanner and implemented similarly to the previous work . After the acquisition, images were reconstructed and segmented using thresholding and a combination of standard morphological operations, namely, dilation and erosion.…”

Section: Methodsmentioning

confidence: 99%

“…It was achieved thanks to the exposed application programming interface of the Versa scanner and implemented similarly to the previous work. 64 After the acquisition, images were reconstructed and segmented using thresholding and a combination of standard morphological operations, namely, dilation and erosion. Fibers’ voxels, delineated from other features, were then integrated in the normal direction to create two-dimensional thickness maps.…”

Section: Methodsmentioning

confidence: 99%

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Chemical Prelithiated 3D Lithiophilic/-Phobic Interlayer Enables Long-Term Li Plating/Stripping

Schöner,

Schmidt,

Chen

et al. 2024

ACS Nano

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Chemical Prelithiated 3D Lithiophilic/-Phobic Interlayer Enables Long-Term Li Plating/Stripping

Schöner,

Schmidt,

Chen

et al. 2024

ACS Nano

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Spatio‐Temporal Electrowetting and Reaction Monitoring in Microfluidic Gas Diffusion Electrode Elucidates Mass Transport Limitations

Brosch,

Wiesner,

Decker

et al. 2024

Small

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The use of gas diffusion electrodes (GDEs) enables efficient electrochemical CO2 reduction and may be a viable technology in CO2 utilization after carbon capture. Understanding the spatio‐temporal phenomena at the triple‐phase boundary formed inside GDEs remains a challenge; yet it is critical to design and optimize industrial electrodes for gas‐fed electrolyzers. Thus far, transport and reaction phenomena are not yet fully understood at the microscale, among other factors, due to a lack of experimental analysis methods for porous electrodes under operating conditions. In this work, a realistic microfluidic GDE surrogate is presented. Combined with fluorescence lifetime imaging microscopy (FLIM), the methodology allows monitoring of wetting and local pH, representing the dynamic (in)stability of the triple phase boundary in operando. Upon charging the electrode, immediate wetting leads to an initial flooding of the catalyst layer, followed by spatially oscillating pH changes. The micromodel presented gives an experimental insight into transport phenomena within porous electrodes, which is so far difficult to achieve. The methodology and proof of the spatio‐temporal pH and wetting oscillations open new opportunities to further comprehend the relationship between gas diffusion electrode properties and electrical currents originating at a given surface potential.

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Toward Quantitative Electrodeposition via In Situ Liquid Phase Transmission Electron Microscopy: Studying Electroplated Zinc Using Basic Image Processing and 4D STEM

Park,

Dutta,

Sun

et al. 2024

Small Methods

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High energy density electrochemical systems such as metal batteries suffer from uncontrollable dendrite growth on cycling, which can severely compromise battery safety and longevity. This originates from the thermodynamic preference of metal nucleation on electrode surfaces, where obtaining the crucial information on metal deposits in terms of crystal orientation, plated volume, and growth rate is very challenging. In situ liquid phase transmission electron microscopy (LPTEM) is a promising technique to visualize and understand electrodeposition processes, however a detailed quantification of which presents significant difficulties. Here by performing Zn electroplating and analyzing the data via basic image processing, this work not only sheds new light on the dendrite growth mechanism but also demonstrates a workflow showcasing how dendritic deposition can be visualized with volumetric and growth rate information. These results along with additionally corroborated 4D STEM analysis take steps to access information on the crystallographic orientation of the grown Zn nucleates and toward live quantification of in situ electrodeposition processes.

show abstract

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

Cited by 3 publications

References 56 publications

Chemical Prelithiated 3D Lithiophilic/-Phobic Interlayer Enables Long-Term Li Plating/Stripping

Chemical Prelithiated 3D Lithiophilic/-Phobic Interlayer Enables Long-Term Li Plating/Stripping

Spatio‐Temporal Electrowetting and Reaction Monitoring in Microfluidic Gas Diffusion Electrode Elucidates Mass Transport Limitations

Toward Quantitative Electrodeposition via In Situ Liquid Phase Transmission Electron Microscopy: Studying Electroplated Zinc Using Basic Image Processing and 4D STEM

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