A5043881785- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Physics of Superconductivity and Magnetism
- X-ray Spectroscopy and Fluorescence Analysis
- Magnetic and transport properties of perovskites and related materials
- Electron and X-Ray Spectroscopy Techniques
- Advanced Condensed Matter Physics
- Quantum Dots Synthesis And Properties
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Quantum Information and Cryptography
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and devices
- Copper-based nanomaterials and applications
- Electronic and Structural Properties of Oxides
- Quantum and electron transport phenomena
- Advanced battery technologies research
- Extraction and Separation Processes
- Transition Metal Oxide Nanomaterials
- Advanced Chemical Physics Studies
- ZnO doping and properties
- X-ray Diffraction in Crystallography
- Electrocatalysts for Energy Conversion
- Advanced Memory and Neural Computing
- Iron-based superconductors research
Lawrence Berkeley National Laboratory
2016-2025
Anhui Agricultural University
2024-2025
Shanghai University of Medicine and Health Sciences
2024-2025
Sam Houston State University
2025
Shanghai East Hospital
2025
Argonne National Laboratory
2019-2024
Peking University
2015-2024
Henan Polytechnic University
2024
Xi'an Jiaotong University
2011-2024
Pacific Northwest National Laboratory
2024
Abstract Although single-atomically dispersed metal-N x on carbon support (M-NC) has great potential in heterogeneous catalysis, the scalable synthesis of such single-atom catalysts (SACs) with high-loading is greatly challenging since loading and single-atomic dispersion have to be balanced at high temperature for forming . Herein, we develop a general cascade anchoring strategy mass production series M-NC SACs metal up 12.1 wt%. Systematic investigation reveals that chelation ions,...
A novel air-stable sodium iron hexacyanoferrate (R-Na1.92Fe[Fe(CN)6]) with rhombohedral structure is demonstrated to be a scalable, low-cost cathode material for sodium-ion batteries exhibiting high capacity, long cycle life, and good rate capability. The cycling mechanism of the redox clarified understood through synchrotron-based soft X-ray absorption spectroscopy, which also reveals correlation between physical properties cell performance this material. More importantly, successful...
Lithium-rich layered transition metal oxide positive electrodes offer access to anion redox at high potentials, thereby promising energy densities for lithium-ion batteries. However, is also associated with several unfavorable electrochemical properties, such as open-circuit voltage hysteresis. Here we reveal that in Li
A conductive polymer is developed for solving the long-standing volume change issue in lithium battery electrodes. combination of synthesis, spectroscopy and simulation techniques tailors electronic structure to enable situ doping. Composite anodes based on this commercial Si particles exhibit 2100 mAh g−1 after 650 cycles without any additive. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset....
This work experimentally identifies the charge-transfer energy as a key factor governing catalytic oxygen evolution reaction (OER) activity and mechanism across wide range of perovskite chemistries.
High interfacial resistance in Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub>(LLZO)/Li cells is correlated with the presence of Li<sub>2</sub>CO<sub>3</sub>on LLZO surfaces.
Solid-electrolyte interphase (SEI) is the key component that enables all advanced electrochemical devices, best representative of which Li-ion battery (LIB). It kinetically stabilizes electrolytes at potentials far beyond their thermodynamic stability limits, so cell reactions could proceed reversibly. Its ad hoc chemistry and formation mechanism has been a topic under intensive investigation since first commercialization LIB 25 years ago. Traditionally SEI can only be formed in nonaqueous...
The interaction between the transition metal 3d and oxygen 2p states via hybridization underpins many of phenomena in oxide materials. We report empirical trend this using pre-edge feature O K-edge X-ray absorption spectrum. Our assessment method is built on dipole approximation configuration states. found that increases with number electrons, consistent expected electronegativity trend. support analysis density functional calculations, which reveal a systematic increase state mixing...
The dilemma of employing high-capacity battery materials and maintaining the electronic mechanical integrity electrodes demands novel designs binder systems. Here, we developed a polymer with multifunctionality to maintain high conductivity, adhesion, ductility, electrolyte uptake. These critical properties are achieved by designing polymers proper functional groups. Through synthesis, spectroscopy, simulation, conductivity is optimized tailoring key state, which not disturbed further...
The aqueous sodium-ion battery system is a safe and low-cost solution for large-scale energy storage, because of the abundance sodium inexpensive electrolytes. Although several positive electrode materials, example, Na₀.₄₄MnO₂, were proposed, few negative activated carbon NaTi₂(PO₄)₃, are available. Here we show that Ti-substituted Na₀.₄₄MnO₂ (Na₀.₄₄[Mn₁-xTix]O₂) with tunnel structure can be used as material batteries. This exhibits superior cyclability even without special treatment oxygen...
This review summarizes the history and critical working mechanisms of Li-rich oxides with a special focus on anionic redox reactions.
Recent research has explored combining conventional transition-metal redox with anionic lattice oxygen as a new and exciting direction to search for high-capacity lithium-ion cathodes. Here, we probe the poorly understood electrochemical activity of from material perspective by elucidating effect transition metal on activity. We study two lithium-rich layered oxides, specifically lithium nickel oxides where is either manganese or ruthenium, which possess similar structure discharge...
Abstract The development of high‐voltage LiCoO 2 is essential for achieving lithium‐ion batteries with high volumetric energy density, however, it faces a great deal challenges owing to the materials, structure and interfacial instability issues. In this work, strategy developed, through heat annealing precoated surface layer in situ form high‐voltage‐stable coating layer, which demonstrated be highly effective improve performance . It discovered that reacts Li 1.5 Al 0.5 Ti (PO 4 ) 3 (LATP)...
Developing high-performance batteries relies on material breakthroughs. During the past few years, various in situ characterization tools have been developed and become indispensible studying eventual optimization of battery materials. However, soft X-ray spectroscopy, one most sensitive probes electronic states, has mainly limited to ex experiments for research. Here we achieve operando absorption spectroscopy lithium-ion cathodes. Taking advantage elemental, chemical surface sensitivities...
Recent progress in the understanding of percolation theory points to cation-disordered lithium-excess transition metal oxides as high-capacity lithium-ion cathode materials. Nevertheless, oxygen redox processes required for these materials deliver high capacity can trigger loss, which leads formation resistive surface layers on particles. We demonstrate here that, somewhat surprisingly, fluorine be incorporated into bulk disordered lithium nickel titanium molybdenum using a standard...