A5054575483- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced X-ray Imaging Techniques
- Advanced Battery Technologies Research
- Laser-Plasma Interactions and Diagnostics
- Extraction and Separation Processes
- Iron and Steelmaking Processes
- Electron and X-Ray Spectroscopy Techniques
- Metal Extraction and Bioleaching
- X-ray Spectroscopy and Fluorescence Analysis
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Astrophysical Phenomena and Observations
- Human Pose and Action Recognition
- Machine Learning in Materials Science
- Anomaly Detection Techniques and Applications
- Advanced Electron Microscopy Techniques and Applications
- Digital Holography and Microscopy
- Supercapacitor Materials and Fabrication
- Video Surveillance and Tracking Methods
- Electrical and Thermal Properties of Materials
- Advanced Computational Techniques and Applications
- Video Analysis and Summarization
- Nanoparticle-Based Drug Delivery
- Transition Metal Oxide Nanomaterials
University of Science and Technology of China
2007-2025
ShanghaiTech University
2022-2024
Lanzhou Jiaotong University
2024
Stanford Synchrotron Radiation Lightsource
2018-2022
SLAC National Accelerator Laboratory
2018-2022
Wuhan University of Technology
2021-2022
National Synchrotron Radiation Laboratory
2017-2020
Menlo School
2019
Hefei University
2018
Ocean University of China
2016
Abstract Nickel‐rich layered materials LiNi 1‐x‐y Mn x Co y O 2 are promising candidates for high‐energy‐density lithium‐ion battery cathodes. Unfortunately, they suffer from capacity fading upon cycling, especially with high‐voltage charging. It is critical to have a mechanistic understanding of such fade. Herein, synchrotron‐based techniques (including scattering, spectroscopy, and microcopy) finite element analysis utilized understand the 0.6 0.2 material structural, chemical,...
Abstract The multiscale chemomechanical interplay in lithium‐ion batteries builds up mechanical stress, provokes morphological breakdown, and leads to state of charge heterogeneity. Quantifying the complex composite electrodes with resolution constitutes a frontier challenge precisely diagnosing fading mechanism batteries. In this study, hard X‐ray phase contrast tomography, capable nanoprobing thousands active particles at once, enables an unprecedented statistical analysis transformation...
Abstract The microstructure of a composite electrode determines how individual battery particles are charged and discharged in lithium-ion battery. It is frontier challenge to experimentally visualize and, subsequently, understand the electrochemical consequences particles’ evolving (de)attachment with conductive matrix. Herein, we tackle this issue unique combination multiscale experimental approaches, machine-learning-assisted statistical analysis, experiment-informed mathematical...
Abstract Architecting grain crystallographic orientation can modulate charge distribution and chemomechanical properties for enhancing the performance of polycrystalline battery materials. However, probing interplay between distribution, orientation, remains a daunting challenge. Herein, we elucidate spatially resolved in lithium layered oxides with different arrangements establish model to quantify their distributions. While holistic “surface-to-bulk” prevails particles, orientation-guided...
High-capacity silicon has been regarded as one of the most promising anodes for high-energy lithium-ion batteries. However, it suffers from severe volume expansion, particle pulverization, and repeated solid electrolyte interphase (SEI) growth, which leads to rapid electrochemical failure, while size also plays key role here its effects remain elusive. In this paper, through multiple-physical, chemical, synchrotron-based characterizations, evolutions composition, structure, morphology,...
Nanoparticle-based radio-sensitizers can amplify the effects of radiation therapy on tumor tissue even at relatively low concentrations while reducing potential side to healthy surrounding tissues. In this study, we investigated a hybrid anisotropic nanostructure, composed gold (Au) and titanium dioxide (TiO2), as radio-sensitizer for triple-negative breast cancer (TNBC). contrast other gold-based radio sensitizers, dumbbell-like Au-TiO2 nanoparticles (DATs) show synergistic therapeutic...
Redox phase transformations are relevant to a number of metrics pertaining the electrochemical performance batteries. These deviate from and more complicated than conventional theory nucleation propagation, owing simultaneous changes cationic anionic valence states as well polycrystalline nature battery materials. Herein, we propose an integrative approach mapping constructing chemical topographies investigate redox transformation in layered oxide cathode materials under thermal abuse...
Functional materials and devices are usually morphologically complex chemically heterogeneous. Their structures often designed to be hierarchical because of the desired functionalities, which require many different components work together in a coherent manner. The lithium ion battery, as an energy storage device, is very typical example this kind structure. In cathode, anode, separator soaked liquid electrolyte, facilitating back forward shuttling ions for release. performance battery has...
Nickel-rich layered oxide cathode materials are attractive near-term candidates for boosting the energy density of next generation lithium-ion batteries. The practical implementation these is, however, hindered by unsatisfactory capacity retention, poor thermal stability, and oxygen release as a consequence structural decomposition, which may have serious safety consequences. undesired side reactions often exothermic, causing complicated electro-chemo-mechanical interplay at elevated...
Abstract Lithium‐rich disordered rock‐salt oxides have attracted great interest owing to their promising performance as Li‐ion battery cathodes. While experimental and theoretical efforts are critical in advancing this class of materials, a fundamental understanding key property changes upon Li extraction is largely missing. In the present study, single‐crystal synthesis new cathode material, 1.3 Ta 0.3 Mn 0.4 O 2 (LTMO), its use model compound investigate concentration–driven evolution...
The structural integrity of layered Ni-rich oxide cathode materials is one the most essential factors that critically affect performance and reliability lithium-ion batteries.
Operando observation of the thermally driven evolution a charged NMC cathode offers valuable insights relevant to battery performance and safety.
Novel developments in X-ray sources, optics and detectors have significantly advanced the capability of microscopy at nanoscale. Depending on imaging modality photon energy, state-of-the-art microscopes are routinely operated a spatial resolution tens nanometres for hard X-rays or ∼10 nm soft X-rays. The improvement resolution, however, has led to challenges tomographic reconstruction due fact that imperfections mechanical system become clearly detectable projection images. Without proper...
Li-rich layered cathode materials possess a high capacity by activating both cation and anion oxygen redox, while structural instability irreversible transition metal migration during cycling lead to severe decay voltage drop. Structural design modification are essential obtain high-capacity long-cycling materials. Herein the present work, cation-disordered rocksalt domains form interweave in partially replacing Li Ni with Na Mg. The presence of phase promotes formation stronger more...
The role of nanoscale chemomechanical behavior in the macroscopic performance functional materials is well recognized. For lithium-ion battery cathodes, tremendous effort has been devoted to development new chemistry and structure, yet fundamental understanding correlation between redox processes mechanical properties novel lags behind. In present study, we prepare large discrete single grains Li-excess cation-disordered rocksalts (DRX) investigate their at particle level, using...
The isostructural nature of Li-layered cathodes allows for accommodating multiple transition metals (TMs). However, little is known about how the local TM stoichiometry influences charging behavior battery particles thus impacting performance. Here, we develop heterogeneous compositional distributions in polycrystalline LiNi1-x-yMnxCoyO2 (NMC) to investigate interplay between and charge distribution. These NMC exhibit a broad, continuous distribution Ni/Mn/Co stoichiometry, which does not...
Active cathode particles are fundamental architectural units for the composite electrode of Li-ion batteries. The microstructure has a profound impact on their behavior and, consequently, cell-level electrochemical performance. LiCoO 2 (LCO, dominant material) is often in form well-shaped particles, few micrometres size, with good crystallinity. In contrast to secondary (an agglomeration many fine primary grains), which other common battery populated structural and chemical defects, it...