A5030128551- Perovskite Materials and Applications
- Advanced battery technologies research
- Advanced Battery Materials and Technologies
- Electrocatalysts for Energy Conversion
- Solid-state spectroscopy and crystallography
- Ionic liquids properties and applications
- Electrochemical Analysis and Applications
- Acoustic Wave Resonator Technologies
- Microwave Dielectric Ceramics Synthesis
- Electronic and Structural Properties of Oxides
- Spectroscopy and Laser Applications
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Advancements in Battery Materials
- Phase-change materials and chalcogenides
- Advancements in Solid Oxide Fuel Cells
- Layered Double Hydroxides Synthesis and Applications
- Luminescence and Fluorescent Materials
- Terahertz technology and applications
- Ferroelectric and Piezoelectric Materials
- Gas Sensing Nanomaterials and Sensors
- Membrane-based Ion Separation Techniques
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Organic and Molecular Conductors Research
Argonne National Laboratory
2023-2024
Energy Storage Systems (United States)
2023
Wayne State University
2019-2022
Michigan United
2020
Aqueous zinc-ion batteries (ZIBs) employing zinc metal anodes are gaining traction as for moderate to long duration energy storage at scale. However, corrosion of the anode through reaction with water limits battery efficiency. Much research in past few years has focused on additives that decrease hydrogen evolution, but precise mechanisms by which this takes place often understudied and remain unclear. In work, we study role an acetonitrile antisolvent additive improving performance aqueous...
Recent efforts to improve zinc metal anode reversibility in aqueous electrolytes have primarily focused on tailoring Zn2+ solvation. We propose a complementary approach directly engineer the interphase with help of two co-cations. The designed organic co-cations offer distinct improvements: partially fluorinated pyrrolidinium cation effectively suppresses parasitic reactions such as hydrogen evolution (<6 μA cm−2), while an ether-functionalized ammonium inhibits dendrite formation (almost 10...
Multi-anion electrolytes form mixed anion contact ion pairs (CIPs), even when the constituent anions do not CIPs in isolation. Mixed are shown to be general for divalent cations, and their relative fraction is tunable by composition.
Discovery of stable and efficient electrolytes that are compatible with magnesium metal anodes high-voltage cathodes is crucial to enabling energy storage technologies can move beyond existing Li-ion systems. Many promising for have been proposed chloride-based systems at the forefront; however, Cl-containing lack oxidative stability required by cathodes. In this work, we report trifluoromethanesulfonate (triflate) as a viable coanion Cl-free, mixed-anion electrolytes. The addition triflate...
The properties of mid-band-gap electronic states are central to the potential application self-assembled, hybrid organic-inorganic perovskite-like quantum wells in optoelectronic technologies. We investigate broadband light emission from fast-forming organic lead iodide at room temperature. By comparing temperature- and intensity-dependent photoluminescence (PL) spectra emitted butyl ammonium spaced inorganic layers, we propose that structural defects a metastable material phase trap...
The facile synthesis and electronic properties of two-dimensional hybrid organic-inorganic perovskites (2D HOIPs) make these self-assembled systems an important class energy materials. basic building blocks materials include inorganic lattice frameworks that often consist lead-halide octahedra organic molecules possessing ammonium functional groups. Understanding the coupling between layers is key to unraveling how 2D HOIPs relate their structures. In this work, we leverage Raman...
There remains a gap in our knowledge of the fundamental physical determinants dynamical interactions between constituents two-dimensional hybrid perovskites, sometimes called self-assembled quantum wells (SAQWs). In this study, we use anharmonic properties vibrations localized on molecular cations two separate SAQW samples to characterize their coupling low-frequency phonons these materials. For case an aromatic cation, benzyl ammonium, analysis Raman spectra propose that quartic spread over...
The formation of color centers capable emitting narrowband light emission from solution-phase precursors would enable a new direction in the design and characterization single photon emitters for quantum information processors. In this study, we present an experimental approach through which form defective samples two-dimensional hybrid organic–inorganic perovskite hexyl ammonium lead iodide whose spectra possess narrow peaks below optical gap. We use temperature-dependent photoluminescence...
Rational principles from which one can design the energy storage capability of antiferroelectric crystalline materials composed hydrogen-bonded molecular constituents remain deficient. In particular, there remains gaps in our understanding fundamental physical mechanisms by microscopic electrostatics this class control macroscopic properties central to potential technologies. While vibrations have been applied as probes other areas chemistry, their ability report antiferroelectrics an open...
Aqueous zinc-ion batteries (ZIBs) employing zinc metal anodes are gaining traction as for moderate to long duration energy storage at scale. While ZIBs with near-neutral pH electrolytes attractive safety reasons, corrosion of the anode through reaction water limits battery efficiency. Much research in past few years has focused on additives that decrease hydrogen evolution, but precise mechanisms by which this takes place often understudied and remain unclear. In work, we study role an...
Abstract Metal–organic frameworks (MOFs) have received significant attention thanks to their promising features in the storage and separation of guest molecules. MOFs without open metal sites are emerging as they often less susceptible poisoning compared those with sites. However, a complete understanding binding gas mechanisms such materials is still missing. In this work, we perform comparative study two classes vanadium-based sites: MFM-300-V $$^\text{(III)}$$ <mml:math...
Zinc ion batteries (ZIB) are attractive because of the relative abundance Zn as a core earth element, higher volumetric energy density compared to lithium metal and it is cost effective. Despite this promise, general lack fundamental understanding electrode-electrolyte interface in ZIB, multivalent (MV) technologies more broadly, hinders their wide scale deployment. In particular, solvation structure aqueous non-aqueous electrolytes plays critical role promoting necessary intermolecular...
The need for a diverse range of battery materials an ever-growing energy storage landscape motivates the development new chemistries with higher capacities and more stable supply chains. Zn-ion batteries (ZIB) are particularly attractive option due to abundance low cost Zn associated cathode that can be used create full cell. Extensive work on both aqueous non-aqueous ZIBs has required increasingly complex set electrolytes – in many cases incorporating multiple solvents and/or anions improve...
Zinc-ion batteries have been proposed as promising candidates to address ever-growing demands for energy storage and limited resources available the currently used lithium-battery systems. Despite their promise, apparent advantages of aqueous zinc-ion (low cost high density) are still overshadowed by uncontrolled water interactions at zinc metal-electrolyte interface, such hydrogen evolution reaction electrode corrosion. A number different strategies – e.g., water-in-salt, addition chelating...
Antiferroelectric materials provide great promise in energy storage applications. We established anharmonic contributions explain the vibrational peak shifts and do not correspond to any changes electrostatics of TFMBI.
Low dimension hybrid perovskites are important class of materials for next generation lighting technologies. We use vibrational Raman spectroscopy to probe the structures 3 analogues these central their applications.