A5010650456- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Magnetic and transport properties of perovskites and related materials
- Supercapacitor Materials and Fabrication
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Extraction and Separation Processes
- Multiferroics and related materials
- Advanced Battery Technologies Research
- Advanced Thermoelectric Materials and Devices
- Thermal properties of materials
- Corporate Taxation and Avoidance
- Thermal Expansion and Ionic Conductivity
- Advanced battery technologies research
- Magnetic Properties of Alloys
- Semiconductor materials and devices
- Inorganic Chemistry and Materials
- Ferroelectric and Piezoelectric Materials
- Nuclear Physics and Applications
- Thermal Radiation and Cooling Technologies
- Perovskite Materials and Applications
- Intellectual Capital and Performance Analysis
- Semiconductor materials and interfaces
Peking University
2018-2025
Peking University Shenzhen Hospital
2019-2025
King University
2025
China Institute of Atomic Energy
2022
High Energy Accelerator Research Organization
2019
The Graduate University for Advanced Studies, SOKENDAI
2019
Forschungszentrum Jülich
2009-2018
Jülich Aachen Research Alliance
2016
Institut Laue-Langevin
2014
Indian Institute of Technology Madras
2014
Lithium ion batteries (LIBs) not only power most of today's hybrid electric vehicles (HEV) and (EV) but also are considered as a promising system for grid-level storage. Large-scale applications LIBs require substantial improvement in energy density, cost, lifetime. Layered lithium transition metal (TM) oxides, particular, Li(NixMnyCoz)O2 (NMC, x + y z = 1) the candidates cathode materials with potential to increase densities lifetime, reduce costs, improve safety. In order further boost Li...
Abstract The lithium–sulfur (Li–S) battery is considered a promising candidate for the next generation of energy storage system due to its high specific density and low cost raw materials. However, practical application Li–S batteries severely limited by several weaknesses such as shuttle effect polysulfides insulation electrochemical products sulfur Li 2 S/Li S . Here, doping nitrogen integrating highly dispersed cobalt catalysts, porous carbon nanocage derived from glucose adsorbed...
Abstract Historically long accepted to be the singular root cause of capacity fading, transition metal dissolution has been reported severely degrade anode. However, its impact on cathode behavior remains poorly understood. Here we show correlation between fading and phase/surface stability an LiMn 2 O 4 cathode. It is revealed that a combination structural transformation dominates fading. exhibits irreversible phase transitions driven by manganese(III) disproportionation Jahn-Teller...
Abstract High‐Ni layered oxide cathodes are considered to be one of the most promising for high‐energy‐density lithium‐ion batteries due their high capacity and low cost. However, surfice residues, such as NiO‐type rock‐salt phase Li 2 CO 3 , often formed at particle surface reactivity Ni 3+ inevitably result in an inferior electrochemical performance, hindering practical application. Herein, unprecedentedly clean surfaces without any residues obtained a representative LiNi 0.8 Co 0.2 O...
Defect engineering on electrode materials is considered an effective approach to improve the electrochemical performance of batteries since presence a variety defects with different dimensions may promote ion diffusion and provide extra storage sites. However, manipulating obtaining in-depth understanding their role in remain challenging. Here, we deliberately introduce considerable number twin boundaries into spinel cathodes by adjusting synthesis conditions. Through high-resolution...
Element doping/substitution has been recognized as an effective strategy to enhance the structural stability of layered cathodes. However, abundant substitution studies not only lack a clear identification sites in material lattice, but rigid interpretation transition metal (TM)-O covalent theory is also sufficiently convincing, resulting proposals being dragged into design blindness. In this work, taking Li1.2Ni0.2Mn0.6O2 prototype, intense correlation between "disordered degree" (Li/Ni...
The cathode materials work as the host framework for both Li+ diffusion and electron transport in Li-ion batteries. property is always research focus, while less studied. Herein, we propose a unique strategy to elevate rate performance through promoting surface electric conductivity. Specifically, disordered rock-salt phase was coherently constructed at of LiCoO2 , conductivity by over one magnitude. It increased effective voltage (Veff ) imposed bulk, thus driving more extraction/insertion...
Among various parent compounds of iron pnictide superconductors, ${\text{EuFe}}_{2}{\text{As}}_{2}$ stands out due to the presence both spin density wave Fe and antiferromagnetic (AFM) ordering localized ${\text{Eu}}^{2+}$ moment. Single-crystal neutron-diffraction studies have been carried determine magnetic structure this compound investigate coupling two sublattices. Long-range AFM Eu spins was observed below 190 19 K, respectively. The ${\text{Fe}}^{2+}$ moments is associated with vector...
Nickel-rich transition-metal (TM) layered oxides, particularly those with high Ni content, attract worldwide interest for potential use as high-capacity cathodes in next-generation Li-ion batteries. However, loading increases, Li and sitting at octahedra tend to mix, resulting reduced electrochemical activity, which has been one major obstacle their practical applications. Herein, we investigate the kinetic thermodynamic aspects of Li/Ni mixing LiNi0.7MnxCo0.3–xO2 (0 ≤ x 0.3) they are...
Abstract Sodium‐based layered oxides are among the leading cathode candidates for sodium‐ion batteries, toward potential grid energy storage, having large specific capacity, good ionic conductivity, and feasible synthesis. Despite their excellent prospects, performance of intercalation materials is affected by both a phase transition induced gliding metal slabs air‐exposure degradation within Na layers. Here, this problem significantly mitigated selecting two ions with very different MO...
Abstract In the process of upgrading energy storage structures, sodium‐ion batteries (SIBs) are regarded as most promising candidates for large‐scale grid systems. However, difficulty in further improving their specific capacity and lifespan has become a major obstacle to promoting extensive application. Herein, by optimizing synthesis conditions, biphasic‐Na 2/3 Ni 1/3 Mn O 2 cathode that exhibits an ultrahigh ≈200 mAh g ‐1 without involvement anion redox reactions is successfully...
Ni-rich layered cathode materials are considered as promising electrode for lithium ion batteries due to their high energy density and low cost. However, the rate performance poor electrochemical stability hinder large-scale application of cathodes. In this work, both structural LiNi0.8Co0.1Mn0.1O2 significantly improved via dual-site doping Nb on transition-metal sites, revealed by neutron diffraction results. The Nb-doped delivers 202.8 mAh·g–1 with a capacity retention 81% after 200...
Deficient intrinsic species and suppressed Curie temperatures (Tc) in two-dimensional (2D) magnets are major barriers for future spintronic applications. As an alternative, delaminating non-van der Waals (vdW) can offset these shortcomings involve robust bandgaps to explore 2D magneto-photoconductivity at ambient temperature. Herein, non-vdW α-MnSe2 is first delaminated as quasi-2D nanosheets the study of emerging semiconductor, ferromagnetism behaviors. Abundant nonstoichiometric surfaces...
Abstract Layered transition metal oxides are promising cathode materials for sodium‐ion batteries due to their high energy density and appropriate operating potential. However, the poor structural stability is a major drawback widespread application. To address this issue, B 3+ successfully introduced into tetrahedral site of Na 0.67 Fe 0.5 Mn O 2 , demonstrating effectiveness small‐radius ion doping in improving electrochemical performance. The obtained 0.04 exhibits excellent cycling...
Abstract High‐energy‐density and cost‐effective lithium‐rich oxides (LRO) are considered as the promising cathode materials for next‐generation lithium‐ion batteries . Nevertheless, elevated cut‐off voltage complex interface interactions have presented significant challenges that can lead to material degradation. Specifically, inevitable release of lattice oxygen highly reactive interface‐driven irreversible migration transition metal (TM) ions in LRO make construction a robust extremely...