A5000366471- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Semiconductor materials and devices
- Advanced battery technologies research
- Extraction and Separation Processes
- Thermal Expansion and Ionic Conductivity
- Advanced NMR Techniques and Applications
- Inorganic Chemistry and Materials
- Chemical Synthesis and Characterization
Bar-Ilan University
2017-2023
Alzheimer's Association of Israel
2017-2018
Lithium doping improves structural stability and increases average working potential of manganese oxide cathodes for sodium-ion batteries.
A key issue in the development of sustainable Na-ion batteries (NIBs) is stability electrolyte solution and its ability to form effective passivation layers on both cathode anode. In this regard, use fluorine-based additives considered a promising direction for improving electrode performance. Fluoroethylene carbonate (FEC) trans-difluoroethylene (DFEC) were demonstrated as or cosolvents that passivating surface films Li-ion batteries. Their effect evaluated first time with cathodes NIBs. By...
Among the examined organic electrodes for aqueous mono and multivalent ions batteries, polyimide is considered a promising candidate because of its high capacity good cyclability in different electrolyte solutions. While most studies so far were focused on energetic performance anodes, much less known about their charge storage mechanism particularly how such are affected by solvation properties inserted cations. Using situ EQCM-D, direct assessment cationic fluxes hydration shells...
The transference number for cations, t + , is one of the most important parameters characterizing polymeric and/or composite solid electrolytes. It expresses contribution positive charge carriers to total conductivity, which in turn reflects degree polarization due negative electrolyte systems. Four electrochemical methods based on different equations commonly used obtaining are compared. A series experiments were conducted with polymer electrolytes polyethylene oxide and without TiO 2...
Electrochemical ion exchange in a sodium cell.
Solid-state batteries have received renewed attention in recent years. The present study compares all-solid-state sodium containing metal anodes, NaTi 2 (PO 4 ) 3 (NTP) cathodes and PEO polymer electrolyte (PE) with two salts—NaPF 6 NaClO . Electrochemical properties were determined by means of both AC DC measurements. For fresh symmetric cells, it seems like using as the salt leads to a lower interfacial resistance, but during contact Na PEO:NaClO PE produces an unstable interface whereas...
Solid electrolytes based on polyethylene oxide (PEO) have been studied for decades, owing to their facile and low-cost processing, good electrochemical stability, excellent complexation with alkali metal salts. Complexes of PEO appropriate sodium salts are well known ionic conduction. Here, pristine NaPF 6 :P(EO) 16 a composite solid electrolyte containing TiO 2 nanowires were investigated as candidates rechargeable solid-state batteries. Comprehensive characterizations carried out,...
Disordered carbons are promising anode materials for sodium ion batteries. However, a major drawback of these is their low coulombic efficiency in the first cycles, which indicates parasitic reactions. Such reactions can be suppressed by alumina coating on surface anodic materials; more ions then available electrochemical activity, and less electrolyte solution lost. On other hand, some pores edge sites passivated no longer reversible reaction with ions; hence, contribution eliminated,...
Mo6S8 Chevrel phase (CP) is still the most effective magnesium ions insertion material that was examined in cathodes for rechargeable Mg battery model systems. Its synthesis includes CuMo6S8 as an intermediate which undergoes Cu leaching. Thereby, CP materials may contain small amounts of copper. CuxMo6S8 complex processes include reversible displacement We report herein on a study Cu0.09Mo6S8 electrodes two electrolyte solutions are important secondary batteries: C6H6MgCl/AlCl3/THF (all...
High electrolyte-electrode interface stability is essential for solid state batteries to avoid side reactions that form interphases and voids, leading loss of contact increased impedance. Such detrimental situations increase overvoltage, reduce cycling efficiency, shorten battery cycle life. While composite electrolytes were studied extensively, the effect inorganic additives in polymer matrix on electrolyte-anode remains unclear. Here, electrolyte was with sodium metal anode based...
Nanometric fillers are known to affect the electrochemical performance of polymer electrolytes. Here, nanowires and nanotubes TiO 2 with same crystal structure compared as additives poly(ethylene oxide) based electrolytes for solid state sodium batteries. Electrochemical studies symmetric cells blocking non-blocking electrodes examined effects additive shapes on bulk electrolyte Na-electrolyte interface. Impedance spectroscopy was used a major electroanalytical tool. To obtain full...
The application of layered oxide compounds as cathode materials for sodium-ion batteries is considered a promising direction the development high-energy Na-ion batteries. However, despite many efforts, practical implementation such electrodes still challenging, mainly due to structural and surface instabilities associated with high operating voltage these cathodes. One most effective ways mitigate undesirable phenomena use atomic layer deposition (ALD) form Nano-sized protective on electrode...
The specific capacity of activated carbon electrodes for supercapacitors may be enhanced with additional faradaic redox reactions by grafting electroactive aromatic molecules heteroatoms that act as centers. Such enrichment was demonstrated recently anthraquinone and catechol using diazonium chemistry. Here, trihydroxybenzene, which has obvious advantages, successfully grafted, yielding a mass 25%. Electrochemical characterization in acidic aqueous solution after situ methoxy deprotection an...
The relatively low capacity and limited cycling retention of many known Na-ion battery prototypes are presumably due to the fact that most cathode materials undergo multiple phase transformations which lead instability during (due stresses challenge their crystal structure). Such structural consequent Na ions insertion cathodes could be one major problems limit practical development batteries. To overcome this issue, we investigated new compounds synthesized through Li–Na ion exchange. We...