A5100398352- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Transition Metal Oxide Nanomaterials
- Extraction and Separation Processes
- Semiconductor materials and devices
- Advanced Battery Technologies Research
- Advanced Photocatalysis Techniques
- Inorganic Fluorides and Related Compounds
- Electron and X-Ray Spectroscopy Techniques
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Smart Grid Energy Management
- Catalytic Processes in Materials Science
- Chemical Synthesis and Characterization
- Gas Sensing Nanomaterials and Sensors
- Power System Reliability and Maintenance
- Analytical Chemistry and Sensors
- Ionic liquids properties and applications
- Inorganic Chemistry and Materials
- Electric Power System Optimization
- Machine Learning in Materials Science
- Microgrid Control and Optimization
- High-Voltage Power Transmission Systems
- Environmental Impact and Sustainability
Beijing University of Technology
2022-2025
University of Illinois Chicago
2018-2024
Fuzhou University
2024
State Grid Corporation of China (China)
2023
Northwestern University
2022
Jianghan University
2022
South China University of Technology
2013
National Institute of Metrology
2009
Layered Na-based oxides with the general composition of NaxTMO2 (TM: transition metal) have attracted significant attention for their high compositional diversity that provides tunable electrochemical performance electrodes in sodium-ion batteries. The various compositions bring forward complex structural chemistry is decisive layered stacking structure, Na-ion conductivity, and redox activity, potentially promising new avenues functional material properties. In this work, we explored...
Abstract Triggering oxygen‐related activity is demonstrated as a promising strategy to effectively boost energy density of layered cathodes for sodium‐ion batteries. However, irreversible lattice oxygen loss will induce detrimental structure distortion, resulting in voltage decay and cycle degradation. Herein, P2‐type Na 0.66 Li 0.22 Ru 0.78 O 2 cathode designed, delivering reversible Ru‐based redox chemistry simultaneously. Benefiting from the combination strong 4d‐O 2p covalency stable...
Disordered rock salt cathodes showing both anionic and cationic redox are being extensively studied for their very high energy storage capacity. Mn-based disordered compounds show much higher efficiency compared to the Ni-based materials as a result of different voltage hysteresis, 0.5 2 V, respectively. To understand origin this difference, we herein report design two model compounds, Li1.3Ni0.27Ta0.43O2 Li1.3Mn0.4Ta0.3O2, study charge compensation mechanism through uptake removal Li via an...
Abstract Li‐rich cathode materials are of significant interest for coupling anionic redox with cationic chemistry to achieve high‐energy‐density batteries. However, lattice oxygen loss and derived structure distortion would induce serious capacity voltage decay, further hindering its practical application. Herein, a novel material, O3‐type Li 0.6 [Li 0.2 Mn 0.8 ]O 2 , is developed the pristine state displaying both excess in transition metal layer deficiency alkali layer. Benefiting from...
Abstract As one of the high‐energy cathode materials lithium‐ion batteries (LIBs), lithium‐rich‐layered oxide with “single‐crystal” characteristic (SC‐LLO) can effectively restrain side reactions and cracks due to reduced inner boundaries enhanced mechanical stabilities. However, there are still high challenges for SC‐LLO diverse performance requirements, especially on their cycle stability improvement. Herein, a novel concentration gradient LLO (GSC‐LLO), gradually decreasing Mn increasing...
The electrochemical CO2 reduction reaction (ECO2RR) is a promising approach to generate renewable fuels and commodities with the integration of energy. Cu-based catalysts produce an array products resulting from transfer 2e– 18e– during ECO2RR. Value-added C2+ are great interest yet difficult selectively produce. Oxide-derived Cu (OD-Cu)-type have shown improved selectivity activity over metallic that not been preoxidized. Undercoordinated sites on OD-Cu-type suggested be active for enhanced...
Controllable anionic redox for a transformational increase in the energy density is pursuit of next generation Li-ion battery cathode materials. Its activation mechanism coupled with local coordination environment around O, which posts experimental challenges control. Here, tuning capability shown by varying O via experimentally controlling stacking faults Li2 MnO3 , parent compound Li-rich oxides. By combining computational analysis and spectroscopic study, it quantitatively revealed that...
Li-rich layered oxides are promising cathode candidates for high-energy-density Li-ion batteries because of the combination cationic and anionic redox activities. However, severe lattice oxygen loss inevitably induces irreversible Li migration in both transition metal (TM) layers, which degrades stability Li–O–Li configuration, resulting serious structure distortion capacity decay. Herein, a Li–O–Na configuration was first introduced Li-based by Na substitution within TM not only obtained...
A highly stable Mn-based composite-structure cathode material is constructed with the low crystallinity pre-introduced high-voltage spinel and Li 2 MnO 3 crystal domains, realizing excellent stability low-strain behaviours.
The emergence of anionic redox has recently garnered intense interest for lithium/sodium-ion batteries because the increasing specific capacities cathodes, which is considered as a transformative approach designing cathode materials. Nevertheless, widespread use such oxygen-related still precluded oxygen release and correlated irreversible structural transformations voltage fade. To fundamentally unravel related mechanism, we have investigated corresponding process based on new P3-type...
Germanium (Ge)-based materials can serve as promising anode candidates for high-energy lithium-ion batteries (LIBs). However, the rapid capacity decay caused by huge volume expansion severely retards their application. Herein, we report a facile and controllable synthesis of Ge nanowire through molten-salt electrolysis. The optimal nanowires deliver 1058.9 mAh g-1 at 300 mA above 602.5 3000 900 cycles. By in situ transmission electron microscopy X-ray diffraction, multiple-step phase...
In order to exploit electrochemical capacity beyond the traditionally utilized transition-metal redox reactions in lithium-metal-oxide cathode materials, it is necessary understand role that oxygen ions play charge compensation mechanisms, is, know conditions triggering electron transfer on and whether this correlated with battery capacity. Theoretical experimental investigations of a model material, Li-rich layered Li2IrO3, have been performed study structural electronic changes induced by...
Heteroanionic materials exhibit great structural diversity with adjustable electronic, magnetic, and optical properties that provide immense opportunities for design. Within this material family, perovskite oxynitrides incorporate earth-abundant nitrogen differing size, electronegativity, charge into oxide, enabling a unique approach to tuning metal-anion covalency energy of metal cation electronic states, thereby achieving functionality may be inaccessible from their oxide counterparts,...
A combination of oxygen redox and Mn-based oxides would be the best option for high-energy-density Li-ion batteries crucial a sustainable society. The disordered rock-salt Li4Mn2O5 was recently reported to display very large capacity 460 mAh/g with moderate reversibility. Previous studies proposed involvement lattice in such intriguing electrochemical performance, whereas no direct evidence presented. To clarify charge compensation mechanism, we systematically investigated evolution...
Fast and accurate load control is helpful in maintaining grid frequency stability case of emergency. Conventional under-frequency shedding schemes (UFLS) suffer from low granularity while individual frequency-load methods require sophisticated controllers therefore are cost-prohibitive. This paper presents an innovative framework, Grid Sense, for fast adaptive based on the Internet Things (IoT), edge computing, nonintrusive monitoring (NILM). Sense provides a promising cost-effective...
Transformational increases in the storage capacity of battery cathodes could be achieved by tapping into redox activity at oxide ligands addition to conventional transition metal couples. However, key signatures that govern such lattice oxygen (LOR) have not been ascertained. Li3IrO4 has largest reversible LOR, rendering it a unique model system. Here, X-ray spectroscopy and computational simulations reveal LOR is selectively compensated via O sites with three lone pairs, which are activated...
The finding that triggering the redox activity of oxygen ions within lattice transition metal oxides can boost performances materials used in energy storage and conversion devices such as Li-ion batteries or evolution electrocatalysts has recently spurred intensive innovative research field energy. While experimental theoretical efforts have been critical understanding role nonbonding states ions, a clear picture chemistry species formed upon this oxidation process is still missing. This be,...
The capacity of transition-metal oxides as Li-ion battery cathodes is limited by instabilities that arise when high states charge are achieved. Oxyfluorides with a disordered rocksalt structure have emerged attractive alternatives, but the role F in their electrochemical function, particularly cationic redox produces formal oxidation states, remains to be ascertained. Using X-ray absorption spectroscopy, we confirm existence Mn–F covalent interactions Li2MnO2F and Li2Mn2/3Nb1/3O2F. New...