A5082609119- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Advanced Battery Technologies Research
- Electrocatalysts for Energy Conversion
- Supercapacitor Materials and Fabrication
- Electrochemical Analysis and Applications
- Transition Metal Oxide Nanomaterials
- Food composition and properties
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Muscle metabolism and nutrition
- Hydrogels: synthesis, properties, applications
- Catalytic Processes in Materials Science
- Electrodeposition and Electroless Coatings
- 3D Printing in Biomedical Research
- Multiferroics and related materials
- Catalysis and Oxidation Reactions
- Extraction and Separation Processes
- Copper-based nanomaterials and applications
- Diet and metabolism studies
- Ferroelectric and Piezoelectric Materials
- Electrospun Nanofibers in Biomedical Applications
- Electronic and Structural Properties of Oxides
Virginia Tech
2020-2025
Sinopec (China)
2011
The surface of an electrocatalyst undergoes dynamic chemical and structural transformations under electrochemical operating conditions. There is a exchange metal cations between the electrolyte. Understanding how iron in electrolyte gets incorporated nickel hydroxide critical for pinpointing roles Fe during water oxidation. Here, we report that incorporation oxygen evolution reaction (OER) are highly coupled, especially at high working potentials. rate much higher OER potentials than dormant...
To date, dilute ether electrolytes have been believed to be incompatible with graphite in Li-ion batteries due the detrimental solvent cointercalation and exfoliation. Here, we provide design criteria of for a reversible anode based on tailoring solvation structures thermodynamic properties. We clarify that solvents can support reversibly by modulating anion. Our redesigned electrolyte consisting single-solvent 1,3-dioxolane (DOL) 1 M single-salt lithium bis(fluorosulfonyl)imide (LiFSI)...
Abstract In the spinel oxide cathode family, LiNi 0.5 Mn 1.5 O 4 (LNMO) shows a high operating voltage (≈4.7 V vs Li/Li + ) and excellent Li‐ion mobility with stable 3D conducting channels. Ni/Mn cation disordered ordered phases usually coexist in LNMO materials, they have distinct structural electrochemical properties, resulting different battery performances for materials phase compositions. Identifying correlation between compositions properties is of significance to improvement...
Solid-electrolyte interphases (SEIs) in advanced rechargeable batteries ensure reversible electrode reactions at extreme potentials beyond the thermodynamic stability limits of electrolytes by insulating electrons while allowing transport working ions. Such selective ion occurs naturally biological cell membranes as a ubiquitous prerequisite many life processes and foundation biodiversity. In addition, can selectively open close channels response to external stimuli (e.g., electrical,...
Ether solvents are suitable for formulating solid-electrolyte interphase (SEI)-less ion-solvent cointercalation electrolytes in graphite Na-ion and K-ion batteries. However, ether-based have been historically perceived to cause exfoliation of cell failure Li-ion In this study, we develop strategies achieve reversible Li-solvent through combining appropriate Li salts ether solvents. Specifically, design 1M LiBF4 1,2-dimethoxyethane (G1), which enables natural deliver ~91% initial Coulombic...
The broader application of nickel-rich layered oxides as positive electrode materials for lithium-ion batteries has been hindered by their high manufacturing cost and inferior cycling stability. Thermal processing, which is integral to fundamental in science, not fully utilized design advanced materials. Herein, we demonstrate the capability using quenching heat treatment regulate Li distribution modulate electronic structure near particle surface. resulting exhibit less parasitic reactions...
Porous carbon scaffolds can host lithium (Li) metal anodes to potentially enable stable Li batteries. However, the poor wettability on surface has inhibited uniform distribution of metallic most scaffolds. Herein, this work reports a lithiophilic top layer through mild ozonolysis and ammoniation methods universally facilitate infiltration liquid into matrices. Based finding, thin, lightweight Li@carbon film (CF) composite anode with high practical capacity 3222 mAh g−1 suppressed volume...
Spinel LiNi0.5Mn1.5O4 (LNMO) can adopt two crystallographic structures: an ordered P4332 structure and a disordered Fd3̅m structure. The phase is associated with the reduction of small amount Mn4+ to Mn3+. LNMO single-crystals likely contain local regions both regions, which ensemble-averaged characterizations fail distinguish. Herein, we employ high-spatial-resolution synchrotron X-ray nanodiffraction techniques identify lattice distortions structural defects in samples octahedral...
Traditional Li-ion intercalation chemistry into graphite anodes exclusively utilizes the cointercalation-free or cointercalation mechanism. The latter mechanism is based on ternary compounds (t-GICs), where glyme solvents were explored and proved to deliver unsatisfactory cyclability in LIBs. Herein, we report a novel mechanism, that is, situ synthesis of t-GIC tetrahydrofuran (THF) electrolyte via spontaneous, controllable reaction between binary-GIC (b-GIC) free THF molecules during...
Abstract Benefiting from abundant resource reserves and considerable theoretical capacity, sodium (Na) metal is a strong anode candidate for low‐cost, large‐scale energy storage applications. However, extensive volume change mossy/dendritic growth during Na electrodeposition have impeded the practical application of batteries. Herein, self‐sodiophilic carbon host, lignin‐derived nanofiber (LCNF), reported to accommodate through an infiltration method. completely encapsulated in 3D space LCNF...
Controlling the electrochemical interfacial processes that govern durability of electrochromic devices represents a key challenge in developing sustainable and cost-effective smart windows.
Abstract Understanding how various redox activities evolve and distribute in disordered rocksalt oxides (DRX) can advance insights into manipulating materials properties for achieving stable, high‐energy batteries. Herein, the authors present reaction kinetics spatial distribution of are governed by particle size DRX materials. The size‐dependent electrochemical performance is attributed to distinct cationic anionic at different sizes, which be tailored achieve optimal capacity stability....
Lignin is one of the most abundant biopolymers in nature. Although lignin-derived hard carbon (L-HC) has potential to be used as a sodium-ion battery (SIB) anode but limited by its poor electrochemical performance. In nature, lignin normally coexists with cellulose and hemicellulose agricultural biomass, studies have applied different biomasses make SIB anodes; however, underlying mechanism, especially functionality each component, still unclear. this study, we aim combine and/or produce...
The solid–liquid electrochemical interface offers a reactive environment for interfacial reactions to tailor electrode surface chemistry under operating conditions. Herein, we demonstrate that the dissolution and redeposition kinetics of transition metal cations, ubiquitous phenomenon at interface, can be manipulated regulate chemical composition crystal structure surface, as well overall performance. Foreign cations (e.g., Ti4+), either added electrolyte additives or dissolved from...
Improving electrolyte stability to suppress water electrolysis represents a basic principle for designing aqueous batteries. Herein, we investigate counterintuitive roles that plays in regulating intercalation chemistry. Using the NaxFe[Fe(CN)6]∥NaTi2(PO4)3 (x < 1) battery as platform, report high-voltage overcharging can serve an electrochemical activation approach achieving concurrent Na-ion and electrolytic oxygen evolution reaction. When cell capacity is intrinsically limited by...
The diffusion layer created by transition metal (TM) dissolution is ubiquitous at the electrochemical solid-liquid interface and plays a key role in determining performance. Tracking spatiotemporal dynamics of has remained an unresolved challenge. With spatially resolved synchrotron X-ray fluorescence microscopy micro-X-ray absorption spectroscopy, we demonstrate situ visualization chemical identification dynamic near electrode surface under operating conditions. Our method allows for direct...
Aqueous Li-ion batteries (ALIBs) are an important class of battery chemistries owing to the intrinsic non-flammability aqueous electrolytes. However, water is detrimental most cathode materials and could result in rapid cell failure. Identifying degradation mechanisms evaluating pros cons different crucial guide selection maximize their electrochemical performance ALIBs. In this study, we investigate stability LiFePO 4 (LFP), LiMn 2 O (LMO) LiNi 0.8 Mn 0.1 Co (NMC) cathodes, without...
Earth-abundant, cost-effective electrode materials are essential for sustainable rechargeable batteries and global decarbonization. Manganese dioxide (MnO 2 ) hard carbon both exhibit high structural chemical tunability, making them excellent candidates batteries. Herein, we elucidate the impact of electrolytes on cycling performance commercial electrolytic manganese in Li chemistry. We leverage synchrotron X-ray analysis to discern state local characteristics Mn during cycling, as well...
Abstract Lithium‐ion batteries (LIBs) are increasingly encouraged to enhance their environmental friendliness and safety while maintaining optimal energy density cost‐effectiveness. Although various electrolytes using greener safer glyme solvents have been reported, the low charge voltage (usually lower than 4.0 V vs Li/Li + ) restricts of LIBs. Herein, tetraglyme, a less‐toxic, non‐volatile, non‐flammable ether solvent, is exploited build It demonstrated that electrolytes, at standard salt...