A5107594813- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Semiconductor materials and devices
- Electrochemical Analysis and Applications
- Graphene research and applications
- Electron and X-Ray Spectroscopy Techniques
- Solid-state spectroscopy and crystallography
- Extraction and Separation Processes
- Semiconductor materials and interfaces
- Advancements in Solid Oxide Fuel Cells
- Catalytic Processes in Materials Science
- Analytical Chemistry and Sensors
- Fiber-reinforced polymer composites
- Spectroscopy and Quantum Chemical Studies
- Advanced Memory and Neural Computing
- Thermal Expansion and Ionic Conductivity
- Ionic liquids properties and applications
- Thermal and Kinetic Analysis
- Layered Double Hydroxides Synthesis and Applications
Tel Aviv University
2015-2024
Electrochemical Society
2022
Hebrew University of Jerusalem
2009-2016
Rambam Health Care Campus
2013
Division of Chemistry
2002
Hunter College
2001
It is suggested that in practical nonaqueous battery systems the alkali and alkaline earth metals are always covered by a surface layer which instantly formed reaction of metal with electrolyte. This layer, acts as an interphase between solution, has properties solid The corrosion rate metal, mechanism deposition‐dissolution process, kinetic parameters, quality deposit, half‐cell potential depend on character electrolyte (SEI).
The Solid-Electrolyte-Interphase (SEI) model for non-aqueous alkali-metal batteries constitutes a paradigm change in the understanding of lithium and has thus enabled development safer, durable, higher-power lower-cost portable EV applications. Prior to publication SEI (1979), researchers used Butler-Volmer equation, which direct electron transfer from electrode cations solution is assumed. proved that this mistaken concept that, practice, electrons battery, must be prevented, since it will...
Recent studies show that the SEI on lithium and anodes in liquid nonaqueous solutions consists of many different materials including , LiF, LiCl, alkoxides, nonconducting polymers. The equivalent circuit for such a mosaic‐type electrode is extremely complex. It shown near room temperature grain‐boundary resistance (Rgb) polyparticle solid electrolytes larger than bulk ionic resistance. Up to now, all models electrodes ignored contribution Rgb overall We here this neglect has no...
The redox processes of at a glassy carbon electrode in THF was studied by programmed cyclic voltammetry the range +1300 to −2000 mV (vs. polysulfide reference electrode) sweep rates 2–200 mV/s. One anodic and up three cathodic peaks were detected. peak seems result from oxidation all PS's through same intermediate elemental sulfur. first is caused reduction PS diffusion controlled reaction. second most likely arises . This apparently preceded chemical step. third or S2− mixture both...
The effects of mild oxidation (burning) two synthetic graphites on the reversible and irreversible capacities, anode‐degradation rate (on cycling) in three different electrolytes graphite‐surface topology have been studied. STM images both modified show nanochannels having an opening a few nanometers up to tens nanometers. It is believed that these are formed at zigzag armchair faces between adjacent crystallites vicinity defects impurities. Mild burn‐off was found improve performance cells:...
3D microbatteries are proposed as a step change in the energy and power per footprint of surface mountable rechargeable batteries for microelectromechanical systems (MEMS) other small electronic devices. Within battery electrode, nanoarchitecture gives mesoporosity, increasing by reducing length diffusion path; separator region it can form basis robust but porous solid, isolating electrodes immobilising an otherwise fluid electrolyte. microarchitecture whole cell allows fabrication...
The mechanisms of oxidation the basal plane and cross‐sectional face highly oriented pyrolytic graphite (HOPG) formation a solid electrolyte interphase (SEI) on HOPG samples that were cycled in ethylene carbonate:diethyl carbonate (EC:DEC 1:2) solutions containing 1 M studied. X‐ray photoelectron spectroscopy, energy dispersive spectrometry, scanning electron microscope techniques used for analysis surface layer formed cross section HOPG. indicates are entirely different. SEI solution is...
The lithium‐sulfur battery recently developed in our laboratory shows 95%+ sulfur utilization but low rate capability due to its poorly conducting electrolyte, which is based on a THF:toluene solvent mixture. In order increase the of this cell, dioxolane‐based electrolytes have been evaluated. conductivity consisting mixtures THF, toluene, and dioxolane were measured temperature range −30° +60°C. compatibility lithium with these was also studied. It found that dioxolane‐rich are compatible...
The solid electrolyte interphase (SEI) plays a key role in lithium‐metal, lithium‐alloy, and lithium‐ion batteries. SEI on both lithium carbonaceous electrodes consists of many different materials including LiF, , alkoxides, nonconductive polymers, more. Close to the or thermodynamically stable anions, such as halides. solution also contains partially reduced polyolefins, semicarbonates, etc. These form simultaneously precipitate electrode mosaic microphases. phases may, under certain...
Autonomous MEMS require similarly miniaturized power sources. In this paper, we present the first working three-dimensional (3-D) rechargeable Li-ion thin-film microbattery technology that is compatible with requirements. The has been developed, and full 3-D cells have manufactured on both glass silicon substrates. Our microbatteries a sandwich-like structure of conformal electrodes, electrolyte current collectors. films are deposited sequentially all available surfaces perforated substrate...
Here, we report on the scalable synthesis and characterization of novel architecture three-dimensional (3D) high-capacity amorphous silicon nanowires (SiNWs)-based anodes with focus studying their electrochemical degradation mechanisms. We achieved an unprecedented combination remarkable performance characteristics, high loadings 3-15 mAh/cm(2), a very low irreversible capacity (10% for 3-4 mAh/cm(2) anodes), current efficiency greater than 99.5%, cycle stability (both in half cells LiFePO4...
Non-aqueous lithium-oxygen batteries are considered as most advanced power sources, albeit they facing numerous challenges concerning almost each cell component. Herein, we diverge from the conventional and traditional liquid-based non-aqueous Li-O2 to a system based on solid polymer electrolyte (SPE-) operated at temperature higher than melting point of electrolyte, where useful applicable conductivity values easily achieved. The proposed SPE-based is compared cells ethylene glycol dimethyl...