Soft X-ray spectroscopy with transition-edge sensors at Stanford Synchrotron Radiation Lightsource beamline 10-1

Lee, Sang-Jun; Titus, Charles J.; Alonso-Mori, Roberto; Baker, Michael L.; Bennett, Douglas A.; Cho, Hsiao-Mei; Doriese, W. B.; Fowler, Joseph W.; Gaffney, Kelly J.; Gallo, Alessandro; Gard, Johnathon D.; Hilton, G. C.; Jang, Hoyoung; Joe, Young Il; Kenney, C. J.; Knight, J.; Kröll, Thomas; Lee, Jun‐Sik; Li, Dale; Lü, Donghui; Marks, R. F.; Minitti, Michael P.; Morgan, Kelsey M.; Ogasawara, Hirohito; O’Neil, Galen C.; Reintsema, C. D.; Schmidt, Daniel R.; Sokaras, Dimosthenis; Ullom, Joel N.; Weng, Tsu‐Chien; Williams, Christopher S.; Young, B. A.; Swetz, Daniel S.; Irwin, K. D.; Nordlund, Dennis

doi:10.1063/1.5119155

Cited by 52 publications

(26 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Resonant inelastic x-ray scattering (RIXS). Soft XAS and RIXS experiments were conducted at beamline 10-1 at Stanford Synchrotron Radiation Lightsource (SSRL) 54 . More experiment details about the soft x-ray spectroscopic measurements can be found in our previous work 5 .…”

mentioning

confidence: 99%

Depth-dependent valence stratification driven by oxygen redox in lithium-rich layered oxide

Zhang

Wang

et al. 2020

Nat Commun

Self Cite

View full text Add to dashboard Cite

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 however suffers from a voltage decay upon cycling, urging for an in-depth understanding of the particle-level structure and chemical complexity. In this work, we investigate the Li1.2Ni0.13Mn0.54Co0.13O2 particles morphologically, compositionally, and chemically in three-dimensions. While the composition is generally uniform throughout the particle, the charging induces a strong depth dependency in transition metal valence. Such a valence stratification phenomenon is attributed to the nature of oxygen redox which is very likely mostly associated with Mn. The depth-dependent chemistry could be modulated by the particles’ core-multi-shell morphology, suggesting a structural-chemical interplay. These findings highlight the possibility of introducing a chemical gradient to address the oxygen-loss-induced voltage fade in LirNMC layered materials.

show abstract

mentioning

confidence: 99%

Depth-dependent valence stratification driven by oxygen redox in lithium-rich layered oxide

Zhang

Wang

et al. 2020

Nat Commun

Self Cite

View full text Add to dashboard Cite

show abstract

“…All the XAS spectra were normalized by the intensity of the incoming beam, which was measured as a drain current on an electrically isolated gold-coated mesh simultaneously. RIXS measurements were performed using a transition edge sensor (TES) spectrometer, which consisted of a 240-channel energy-dispersive detector array 36 , 37 . The energy collected by the TES was calibrated through separate measurements of a reference sample consisting of C, N, O, and various 3d transition metal oxides with known emission energies.…”

Section: Methodsmentioning

confidence: 99%

Thermal-healing of lattice defects for high-energy single-crystalline battery cathodes

Qian

et al. 2022

Nat Commun

Self Cite

View full text Add to dashboard Cite

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 polycrystalline counterparts. Within the single-crystalline cathode materials, the lattice strain and defects have significant impacts on the intercalation chemistry and, therefore, play a key role in determining the macroscopic electrochemical performance. Guided by our predictive theoretical model, we have systematically evaluated the effectiveness of regaining lost capacity by modulating the lattice deformation via an energy-efficient thermal treatment at different chemical states. We demonstrate that the lattice structure recoverability is highly dependent on both the cathode composition and the state of charge, providing clues to relieving the fatigued cathode crystal for sustainable lithium-ion batteries.

show abstract

“…The transition edge sensor (TES) detector housed at beamline 10-1 at the Stanford Synchrotron Radiation Lightsource (SSRL) provides background-free X-ray emission data and electronic structure information of the valence (occupied) and conduction (unoccupied) density of states (DOS) of both the ND and surface moieties. 69,70 Resonant inelastic X-ray scattering or RIXS maps provides the complete DOS with extraction of X-ray emission spectroscopy (XES) data and partial fluorescence yield X-ray absorption spectroscopy (PFY-XAS). XES and PFY-XAS spectra is produced with an integration window with a static emission or excitation energy as highlighted with the dashed white box in Figure 4B.…”

Section: Soft X-ray Spectroscopy Of Nd-oh Nd-br and Nd-nh3mentioning

confidence: 99%

A metastable brominated nanodiamond surface enables room temperature and catalysis-free amine chemistry

Melendrez

Lopez-Rosas

Stokes

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Bromination of high-pressure high-temperature (HPHT) nanodiamond (ND) surfaces has not been explored and can open new avenues for increased chemical reactivity and diamond lattice covalent bond formation. The large bond dissociation energy of the diamond lattice-oxygen bond is a challenge that prevents new bonds from forming and most researchers simply use oxygen-terminated ND (alcohols and acids) as a reactive species. In this work, we transformed a tertiary alcohol-rich ND surface to an amine surface with 50% surface coverage and was limited by the initial rate of bromination. We observed that alkyl-bromide moieties are highly labile on NDs and are metastable as previously found using density functional theory. The instability of the bromine terminated ND is explained by steric hindrance and poor surface energy stabilization. The strong leaving group properties of the alkyl-bromide intermediate were found to form diamond-nitrogen bonds at room temperature and without catalysts. The chemical lability of the brominated ND surface led to efficient amination with NH3•THF at 298 K, and a catalyst-free Sonogashira-type reaction with an alkyne-amine produced an 11-fold increase in amination rate. Overlapping spectroscopies under inert, temperature-dependent and open-air conditions provided unambiguous chemical assignments. Amine-terminated NDs and folic acid were conjugated using sulfo-NHS/EDC coupling reagents to form amide bonds, confirming that standard amine chemistry remains viable. This work supports that a robust pathway exists to activate a chemically inert diamond surface at room temperature, which broadens the pathways of bond formation when a reactive alkyl-bromide surface is prepared. The unique surface properties of brominated and aminated nanodiamond reported here are impactful to researchers who wish to chemically tune diamond for quantum sensing applications or as an electron source for chemical transformations.

show abstract

Soft X-ray spectroscopy with transition-edge sensors at Stanford Synchrotron Radiation Lightsource beamline 10-1

Cited by 52 publications

References 48 publications

Depth-dependent valence stratification driven by oxygen redox in lithium-rich layered oxide

Depth-dependent valence stratification driven by oxygen redox in lithium-rich layered oxide

Thermal-healing of lattice defects for high-energy single-crystalline battery cathodes

A metastable brominated nanodiamond surface enables room temperature and catalysis-free amine chemistry

Contact Info

Product

Resources

About