Material contrast studies of conductive thin films on semiconductor substrates using scanning electrochemical microscopy

Hanekamp, Patrick; Raith, Timo; Iffelsberger, Christian; Zankl, Tobias; Robl, W.; Matysik, Frank‐Michael

doi:10.1007/s10800-019-01294-2

Cited by 6 publications

(5 citation statements)

References 35 publications

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“…31–35 The SECM has been used for investigation of the catalytic surfaces by reflecting the surface morphology, conductivity and electrochemical activity as well as the location of the HER active sites on the electrocatalytic surfaces. 36–42…”

Section: Introductionmentioning

confidence: 99%

Layered MAX phase electrocatalyst activity is driven by only a few hot spots

2022

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Section: Introductionmentioning

confidence: 99%

Layered MAX phase electrocatalyst activity is driven by only a few hot spots

2022

Self Cite

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“…10a) show an increase in current above the steady state upon approaching the surface of the electrode, consistent with the behavior of materials with a conducting surface. 39,[41][42][43][44] These findings demonstrate that the graphite surface is conductive in its untreated state, and remains conductive after the deposition of the Cu or Ni films.…”

Section: Resultsmentioning

confidence: 70%

Improved Capacity Retention of Lithium Ion Batteries under Fast Charge via Metal-Coated Graphite Electrodes

Yan

Quilty

Abraham

et al. 2020

J. Electrochem. Soc.

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A primary barrier preventing repetitive fast charging of Li-ion batteries is lithium metal plating at the graphite anode. One approach toward mitigating Li metal deposition is the deliberate modification of the graphite anode surface with materials demonstrating high overpotentials unfavorable for Li metal nucleation, such as Ni or Cu nanoscale films. This research explores Ni and Cu surface coatings at different areal loadings (3 or 11 μg cm−2) on the electrochemistry of graphite/LiNi0.6Mn0.2Co0.2O2 (NMC622) type Li-ion batteries. Extended galvanostatic cycling of control and metal-coated electrodes in graphite/NMC622 pouch cells are conducted under high rate conditions. Based on the overpotential of Li deposition on metal foil, both Ni and Cu treatments were anticipated to result in reduced lithium deposition. The higher metal film loadings of 11 μg cm−2 Ni- or Cu-coated electrodes exhibit the highest capacity retention after 500 cycles, with mean improvements of 8% and 9%, respectively, over uncoated graphite electrodes. Li plating quantified by X-ray diffraction indicates that the metal films effectively reduce the quantity of plated Li compared to untreated electrodes, with 11 μg cm−2 Cu providing the greatest benefit.

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“…However, for Cu samples, the bFB is used. Here, a negative potential applied at the Al 2 O 3 /3DCu protects the surface by avoiding the oxidation and dissolution of the Cu due to the interaction with the mediator species. , The SPECM investigation of the catalytic activity of Al 2 O 3 /3DCu photoelectrodes was done using the SG/TC mode. , In this mode, the signal intensity correlates with the concentration of the species generated at the 3DCu and, thus, with the activity of the surface beneath the UME …”

Section: Resultsmentioning

confidence: 99%

“…51,54 In this mode, the signal intensity correlates with the concentration of the species generated at the 3DCu and, thus, with the activity of the surface beneath the UME. 55 The SPECM results are shown in Figure 7; for better illustration, assumed overlays of the (photo)electrochemical images with optical images of the examined surface are depicted. All original images are given in Figure S6 in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Photo-Responsive Doped 3D-Printed Copper Electrodes for Water Splitting: Refractory One-Pot Doping Dramatically Enhances the Performance

2022

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3D-printed electrochemical systems and devices are highly interesting due to their customizability and point-of-need fabrication capabilities. The most common and accessible fused deposition modeling (FDM) often requires modification of the resulting material, usually by atomic layer deposition or electrodeposition. We show doping of FDM-printed copper electrodes with metal oxide crystals via a one-pot preparation step. We will show that such doped materials have dramatically enhanced photoelectrochemical properties. We utilize the fact that the copper/polylactic acid filament requires the sintering of 3D-printed parts as a post-printing procedure to form electrically conductive devices useful for electrochemical applications. Thermally stable refractory materials (i.e., graphite or Al2O3) are mandatory for the sintering process to support the 3D-printed structure. Such refractory materials can dope the surface of the 3D-printed electrode in a one-pot process. For example, here, the Al2O3 microcrystals dramatically affect the measured photocurrents and the performance of the photoelectrodes. The detailed investigation using scanning photoelectrochemical microscopy to image electro- and photoelectrochemical-generated H2 and O2 offers spatially resolved information about the photoelectrochemical activity. Therefore, the presented work will have profound implications for the design and fabrication of metal-based electrochemical and photoelectrochemical 3D-printed devices because the doping method can be transferred to other metals and refractory materials.

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Material contrast studies of conductive thin films on semiconductor substrates using scanning electrochemical microscopy

Cited by 6 publications

References 35 publications

Layered MAX phase electrocatalyst activity is driven by only a few hot spots

Layered MAX phase electrocatalyst activity is driven by only a few hot spots

Improved Capacity Retention of Lithium Ion Batteries under Fast Charge via Metal-Coated Graphite Electrodes

Photo-Responsive Doped 3D-Printed Copper Electrodes for Water Splitting: Refractory One-Pot Doping Dramatically Enhances the Performance

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