A5043330272- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced NMR Techniques and Applications
- Thermal properties of materials
- Fuel Cells and Related Materials
- Advanced X-ray Imaging Techniques
- Electron Spin Resonance Studies
- Advanced Electron Microscopy Techniques and Applications
- Advanced MRI Techniques and Applications
- GaN-based semiconductor devices and materials
- Ultrasound and Hyperthermia Applications
- Force Microscopy Techniques and Applications
- Solid-state spectroscopy and crystallography
- Thermal Radiation and Cooling Technologies
- Characterization and Applications of Magnetic Nanoparticles
- Integrated Circuits and Semiconductor Failure Analysis
- Topological Materials and Phenomena
- Rare-earth and actinide compounds
- Electromagnetic Scattering and Analysis
- Health Sciences Research and Education
- Silicon and Solar Cell Technologies
- Advanced optical system design
- Conducting polymers and applications
- High-pressure geophysics and materials
- Health and Medical Research Impacts
SLAC National Accelerator Laboratory
2024-2025
Pulse Biosciences (United States)
2025
Stanford University
2024-2025
University of Illinois Urbana-Champaign
2018-2024
The University of Texas at Arlington
2019
Abstract Thermal management in Li‐ion batteries is critical for their safety, reliability, and performance. Understanding the thermal conductivity of battery materials crucial controlling temperature distribution batteries. This work provides systemic quantitative measurements three important classes solid electrolytes (SEs) over range 150 < T 350 K. Studies include oxides Li 1.5 Al 0.5 Ge (PO 4 ) 3 6.4 La Zr 1.4 Ta 0.6 O 12 , sulfides 2 S–P S 5 6 PS Cl, Na halides InCl YCl ....
Dark field x-ray microscopy (DXFM) can visualize microstructural distortions in bulk crystals. Using the femtosecond pulses generated by free-electron lasers (XFELs), DFXM achieve sub-μm spatial resolution and &lt;100 fs time simultaneously. In this paper, we demonstrate ultrafast measurements at European XFEL to an optically driven longitudinal strain wave propagating through a diamond single crystal. We also present two scanning modalities that are new sources: 3D 2D axial-strain scans...
Accurately measuring the thermal properties of buried interfaces is crucial for understanding heat transport in multilayered materials, particularly applications such as batteries and integrated circuits. The conventional 3$\omega$ method, which uses a line heater, has limited sensitivity to through-plane due lateral spreading, especially when highly conductive layer overlays resistive one. Additionally, using there lower limit frequency heating, below analytical solution assuming infinite...
Dark-field X-ray microscopy (DFXM) is a novel imaging technique developed at synchrotrons to image along the diffracted beam with real-space resolution of ∼100 nm and reciprocal-space ∼10 −4 radians. Recent implementations DFXM free electron lasers have demonstrated DFXM's ability visualize real-time evolution coherent gigahertz phonons produced by ultrafast laser excitation metal transducers. Combining this strain fields due dislocations makes it possible study interaction damping...
Magnetic resonance imaging (MRI) enables noninvasive three-dimensional thermometry, which has potential applications in biological tissues and engineering systems. In tissues, where MRI is routinely used to monitor temperature during thermal therapies, ${T}_{1}$ or ${T}_{2}$ contrast water are relatively insensitive temperature, techniques with greater sensitivity, such as chemical shift diffusion imaging, suffer from motional artifacts long scan times. MR thermometry not well developed for...
Thermometry based on magnetic resonance has been extensively studied due to its important application in biomedical imaging. In our previous work, we showed that the spin-spin relaxation time (T2) of nuclear (NMR) water is a highly sensitive thermometer as T2 scales with temperature-sensitive self-diffusion constant water. this addition temperature dependent fluid, utilize magnetization 4 nm SPIONs improve sensitivity (4.96) by 1.4 times over (3.48) alone hexane between 248 K and 333 K. To...
Dark-field X-ray microscopy (DFXM) is a novel imaging technique developed at synchrotrons to image along the diffracted beam with real space resolution of ~100 nm and reciprocal $10^{-4}$. Recent implementations DFXM free electron lasers (XFELs) have demonstrated DFXM's ability visualize real-time evolution coherent GHz phonons produced by ultrafast laser excitation metal transducers. Combining this strain fields due dislocations makes it possible study interaction dislocations, studying...
The efficiency of a proton-exchange membrane (PEM) fuel cell depends on the mobility protons in PEMs, which turn is determined by hydration and temperature membrane. Spin-lattice relaxation time (T1) spin-spin (T2) contrast magnetic resonance imaging may be used to map PEMs under isothermal conditions, but not when there are thermal gradients PEMs. In this work, we show that combination chemical shift diffusion can decouple We demonstrate 16 × pixel mapping Nafion with spatial resolution 1...
While there are several two-dimensional thermometry techniques that provide excellent spatial, temporal, and time resolution, is a lack of three-dimensional (3D) work for wide range materials offer good resolution in time, space, temperature. We investigate electron paramagnetic resonance (EPR) n-type silicon germanium as possible means 3D thermometry. the EPR linewidths too broad thermometry, reasonably narrow exhibit strong temperature dependence. The dependence spin-lattice relaxation...
Increasing power densities in integrated circuits has led to an increased prevalence of thermal hotspots circuits. Tracking these is imperative prevent circuit failures. In 3D circuits, conventional surface techniques like infrared thermometry are unable measure temperature distribution and optical magnetic resonance difficult apply due the presence metals large current densities. X-rays offer high penetration depth can be used probe structures. We report a method utilizing dependence x-rays...
Inorganic solid-state battery electrolytes show high ionic conductivities and enable the fabrication of all batteries. In this work, we present temperature dependence spin-lattice relaxation time (T1), spin-spin (T2), resonance linewidth () 7Li nuclear magnetic (NMR) for four (Li3InCl6 (LIC), Li3YCl6 (LYC), Li1.48Al0.48Ge1.52(PO4)3 (LAGP) LiPS5Cl (LPSC) from 173 K to 403 at a frequency 233 MHz, 253 353 291 MHz. Additionally, measured rates an effective 133 kHz using spin-locking pulse...
Inorganic solid-state battery electrolytes show high ionic conductivities and enable the fabrication of all batteries. In this work, we present temperature dependence spin-lattice relaxation time (T1), spin-spin (T2), resonance linewidth () 7Li nuclear magnetic (NMR) for four (Li3InCl6 (LIC), Li3YCl6 (LYC), Li1.48Al0.48Ge1.52(PO4)3 (LAGP) LiPS5Cl (LPSC) from 173 K to 403 at a frequency 233 MHz, 253 353 291 MHz. Additionally, measured rates an effective 133 kHz using spin-locking pulse...
Thermal management of integrated circuits (ICs) is important to prevent thermal hotspots which are the leading cause IC failure. even more critical in 3D (3D ICs) as prevalence expected increase due presence polymers and solder materials that low conductivity. Understanding how conductivity affected by these required for developing thermally aware design. The 3{\omega} method can measure conductivities spanning several orders magnitude appropriate measuring properties layered structures such...
Inorganic solid-state battery electrolytes show high ionic conductivities and enable the fabrication of all batteries. In this work, we present temperature dependence spin-lattice relaxation time (T1), spin-spin (T2), resonance linewidth 7Li nuclear magnetic (NMR) for four (Li3InCl6 (LIC), Li3YCl6 (LYC), Li1.48Al0.48Ge1.52(PO4)3 (LAGP) LiPS5Cl (LPSC)) from 173 K to 403 at a frequency 233 MHz, 253 353 291 MHz. Additionally, measured rates an effective 133 kHz using spin-locking pulse sequence...
In this work, we present the temperature dependence of spin-lattice relaxation time (T1), spin-spin (T2), and resonance linewidth (Δν) 7Li nuclear magnetic (NMR) for four solid-state battery electrolytes - Li3InCl6 (LIC), Li3YCl6 (LYC), Li1.48Al0.48Ge1.52(PO4)3 (LAGP) Li6PS5Cl (LPSC) from 173 K to 403 at a frequency 233 MHz, 253 353 291 MHz. We also measure rates an effective 133 kHz using spin-locking pulse sequence in range K. LPSC, NMR is consistent with Bloembergen-Pound-Purcell (BPP)...
Dark field X-ray microscopy (DXFM) has enabled experiments to visualize microstructural distortions in bulk crystals. Using the femtosecond pulses generated by free-electron lasers (XFEL), DFXM can achieve ~1-um spatial resolution and <100 fs time simultaneously. In this paper, we present first ultrafast measurements at European XFEL. work, demonstrate of laser-induced phonon wavepackets propagating through dislocations inside a diamond single crystal. addition demonstrating new capability,...
The efficiency of a proton exchange membrane (PEM) fuel cell depends on the mobility protons in PEM, which is determined by hydration and temperature membrane. Inhomogeneities PEM cells can occur single layer or along stacking direction. Monitoring these inhomogeneities essential maintaining optimal operating conditions. While optical techniques neutron x-ray scattering may be used to study PEMs, cannot provide 3-dimensional spatial resolution measuring layered PEMs. Due their ability...
Magnetic resonance imaging (MRI) enables non-invasive 3D thermometry during thermal ablation of cancerous tumors. While T1 or T2 contrast MRI are relatively insensitive to temperature, techniques with greater temperature sensitivity such as chemical shift diffusion suffer from motional artifacts and long scan times. We describe an approach for highly sensitive high throughput MR that is not susceptible artifacts. use superparamagnetic iron oxide nanoparticles (SPIONs) spoil water protons....
While several 2D thermometry techniques exist, there is a lack of 3D that work for wide range materials and offer good resolution in time, space temperature. X-ray diffraction (XRD) nuclear magnetic resonance (NMR) imaging can provide temperature information. However, XRD typically limited to crystalline while NMR largely liquids where the lines are narrow. We investigate electron paramagnetic (EPR) n-type silicon germanium thermometry. EPR linewidths too broad, reasonably narrow exhibit...
The efficiency of a proton exchange membrane (PEM) fuel cell depends on the mobility protons in PEM, which is determined by hydration and temperature membrane. While optical techniques or neutron x-ray scattering may be used to study inhomogeneities PEMs, these cannot provide 3 dimensional spatial resolution measuring layered PEMs. Due their ability non-invasive 3D images, spin-lattice relaxation time (T1) spin-spin (T2) contrast magnetic resonance imaging (MRI) PEMs have been suggested as...