A5037126521- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Multiferroics and related materials
- Supercapacitor Materials and Fabrication
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Synthesis of Ferrites
- Extraction and Separation Processes
- Electrical and Thermal Properties of Materials
- Ferroelectric and Piezoelectric Materials
- Second Language Learning and Teaching
- Semiconductor materials and devices
- Advanced Battery Technologies Research
- Mine drainage and remediation techniques
- Hydrogen embrittlement and corrosion behaviors in metals
- Concrete and Cement Materials Research
- X-ray Diffraction in Crystallography
- Reading and Literacy Development
- Transition Metal Oxide Nanomaterials
- Advanced NMR Techniques and Applications
- Multilingual Education and Policy
- Nuclear Materials and Properties
- Physics of Superconductivity and Magnetism
- Advancements in Solid Oxide Fuel Cells
- Dielectric properties of ceramics
Chouaib Doukkali University
2021-2023
Al Akhawayn University
2021-2023
Uppsala University
2010-2014
Cadi Ayyad University
2007-2011
We have investigated LixNi1−y−zCoyMnzO2 compounds with y = 1/3, 0.25, 0.2, 0.1 and z 0.1, 0.05 in order to study the influence of Ni Mn concentration, cationic disorder, crystallite size on magnetic charge/discharge behavior. The samples been studied by means x-ray diffraction, scanning electron microscopy, voltammetry, cycling capacity, magnetometry. discharge capacity increases increasing concentration as does number ferromagnetic interactions. With higher a is observed together formation...
This work presents the first report detailing effect of X-rays on electrochemical decomposition Li2O2, which is main reaction during charging process in a Li–O2 battery. An operando synchrotron radiation powder X-ray diffraction (SR-PXD) experiment was performed. The results indicate that Li2O2 dramatically accelerated under irradiation. follows zero-order reaction, and rate constant proportional to intensity used. A mechanism for irradiation proposed. These give an insight into batteries.
We employ soft X-ray absorption spectroscopy and resonant inelastic scattering to study the redox behavior in first lithiation/delithiation cycle of Li(2-x)MnSiO4 (4.0-4.6 V). For extraction lithium ions up an end potential 4.1 V, we do not detect any change oxidation state for expected redox-active Mn atom, instead electronic structure Si-O network is affected. Above there abrupt Mn-ions, from 2+ 4+, which accompanied by a complete loss long range order material, as detected diffraction....
Structural and magnetic properties of the Li layered oxide, LiNi0.8Co0.1Mn0.1O2, have been studied by means x-ray diffraction, dc magnetization, ac linear, nonlinear susceptibility as well aging temperature cycling experiments. A percolating spin system interacting via antiferromagnetic ferromagnetic superexchange interactions different strength induce a ferrimagnetic quasilong-range order with transition Tc≈70 K, Weiss −25 K an effective moment 2.07 μB. On cooling below Tc two-dimensional...
We have studied low-temperature magnetic properties as well high-temperature lithium ion diffusion in the battery cathode materials LixNi1/3Co1/3Mn1/3O2 by use of muon spin rotation/relaxation. Our data reveal that samples enter into a 2D spin-glass state below TSG ≈ 12 K. further show channels become active for T ≥ Tdiff ~ 125 K where Li-ion hopping-rate [v(T)] starts to increase exponentially. Further, v(T) is found fit very an Arrhenius type equation and activation energy process...
Investigations of the magnetic behavior layered oxide, ${\text{LiNi}}_{0.65}{\text{Co}}_{0.25}{\text{Mn}}_{0.10}{\text{O}}_{2}$, through ac and time-dependent susceptibility, dc linear nonlinear susceptibility as well neutron-diffraction measurements are presented. A ferrimagneticlike spin ordering appears at 119 K with a spontaneous magnetization coexisting frustration in two dimensions (2D). At lower temperature, cluster-glass transition is found 17.4 indicating transformation to...
Recently, the mixed transition metal oxides of form Li (Ni1−y−zCoyMnz)O2, havebecome center attention as promising candidates for novel battery material. These materials have also revealed very interesting magnetic properties due to alternate stacking planes on a 2D triangular lattice and Li-layers. The title compound, (Ni0.8Co0.1Mn0.1) O2, has been investigated by both magnetometry measurements μ+SR. We find evolution localized moments with decreasing temperature below 70 K. ground state (T...
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Abstract not Available.