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Article
Open AccessAsynchronous domain dynamics and equilibration in layered oxide battery cathode
To improve lithium-ion battery technology, it is essential to probe and comprehend the microscopic dynamic processes that occur in a real-world composite electrode under operating conditions. The primary and s...
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Article
Open AccessThermal-healing of lattice defects for high-energy single-crystalline battery cathodes
Single-crystalline nickel-rich cathodes are a rising candidate with great potential for high-energy lithium-ion batteries due to their superior structural and chemical robustness in comparison with polycrystal...
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Article
Machine-and-data intelligence for synchrotron science
Integrated approaches with advanced machine learning techniques are becoming necessary to take full advantage of the advanced experimental capabilities of next-generation synchrotrons. Yi** Liu and colleagues...
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Article
Open AccessDepth-dependent valence stratification driven by oxygen redox in lithium-rich layered oxide
Lithium-rich nickel-manganese-cobalt (LirNMC) layered material is a promising cathode for lithium-ion batteries thanks to its large energy density enabled by coexisting cation and anion redox activities. It ho...
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Article
Open AccessMutual modulation between surface chemistry and bulk microstructure within secondary particles of nickel-rich layered oxides
Surface lattice reconstruction is commonly observed in nickel-rich layered oxide battery cathode materials, causing unsatisfactory high-voltage cycling performance. However, the interplay of the surface chemis...
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Article
Open AccessMachine-learning-revealed statistics of the particle-carbon/binder detachment in lithium-ion battery cathodes
The microstructure of a composite electrode determines how individual battery particles are charged and discharged in a lithium-ion battery. It is a frontier challenge to experimentally visualize and, subseque...
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Article
Open AccessPropagation topography of redox phase transformations in heterogeneous layered oxide cathode materials
Redox phase transformations are relevant to a number of metrics pertaining to the electrochemical performance of batteries. These phase transformations deviate from and are more complicated than the convention...
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Article
Open AccessUnsupervised Data Mining in nanoscale X-ray Spectro-Microscopic Study of NdFeB Magnet
Novel developments in X-ray based spectro-microscopic characterization techniques have increased the rate of acquisition of spatially resolved spectroscopic data by several orders of magnitude over what was po...
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HAXPES at the Dawn of the Synchrotron Radiation Age
Some of the earliest X-ray Photoemission Spectroscopy (XPS) studies with high-energy X-rays took place in the 1970s as a way of demonstrating the feasibility of using synchrotron radiation from a multi-GeV t...
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Article
3D elemental sensitive imaging using transmission X-ray microscopy
Determination of the heterogeneous distribution of metals in alloy/battery/catalyst and biological materials is critical to fully characterize and/or evaluate the functionality of the materials. Using synchrot...
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Article
X-ray Absorption Spectroscopy on Copper Trace Impurities on Silicon Wafers
Trace metal contamination during wet cleaning processes on silicon wafer surfaces is a detrimental effect that impairs device performance and yield. Determining the chemical state of deposited impurities helps...
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Article
A Study of Fabrication and Characterization of Ultra-Small Polycrystalline Silicon Islands for Advanced Display and Microsensor Applications
Polycrystalline silicon (polysilicon) is a key component of integrated circuit technology, micromechanical systems and displays. High-mobility polysilicon thin-film transistors are replacing amorphous-silicon ...
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Article
Investigation of Light Initiated Oxidation of Hydrogen Passivated Silicon Surfaces: Hx-Si(100) and H-Si(111)(1X1)
There are factors present in cleanroom air that may lead to contamination prior to processing. These factors need to be better understood in order to meet tomorrow’s requirement for atomically clean surfaces p...
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Article
Photon-enhanced thermionic emission for solar concentrator systems
Solar-energy conversion usually takes one of two forms: the ‘quantum’ approach, which uses the large per-photon energy of solar radiation to excite electrons, as in photovoltaic cells, or the ‘thermal’ approac...
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Article
3D nanoscale imaging of the yeast, Schizosaccharomyces pombe, by full-field transmission X-ray microscopy at 5.4 keV
Three-dimensional (3D) nanoscale structures of the fission yeast, Schizosaccharomyces pombe, can be obtained by full-field transmission hard X-ray microscopy with 30 nm resolution using synchrotron radiation sour...
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Article
Can studies of the II-VIs profit from the use of synchrotron radiation and the DOE financial support thereof?
Advances in experimental techniques are the life blood of technology and science. Some of these are occurring via development of new techniques using synchrotron radiation (SR). Of particular interest are tech...
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Article
High-Sensitivity Total Reflection X-Ray Fluorescence Spectroscopy of Silicon Wafers Using Synchrotron Radiation
We explored total reflection X-ray fluorescence spectroscopy (TXRF) with a synchrotron source to achieve high sensitivities to surface metals on silicon wafers. Most recently, we directly demonstrated a sensit...
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Article
Synchrotron Radiation for Measurement of Contaminants on Silicon Surfaces
The detection limit for aluminum using total reflection x-ray fluorescence (TXRF) is approximately 100 times lower for a synchrotron source compared to a conventional source. The detection limit for transition...
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Article
Fermi Level Inhomogeneities on GaAs(110) Surface Imaged with a Photoelectron Microscope
A photoelectron microscope operating with a retarding field analyzer has been used to exploit core level energy shifts due to band bending in order to directly image Fermi level variations on n- and p-type cle...
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Article
Multilayer Monochromators for the Soft X-Ray and Extreme Ultraviolet
