HAMIDA Latelli

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HAMIDA Latelli

أحميدة لعطلي

hmida.latelli@univ-msila.dz

06 63 72 82 45

  • Departement of Physics
  • Faculty of Sciences
  • Grade Prof
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About Me

Education

Dotorat. in Lycée Technique de Batna, Algérie

Research Domains

Physics

Location

Msila, Msila

Msila, ALGERIA

Code RFIDE

  • 2025-01-06
  • 2025-01-06

    Electronic structure, mechanical and optical properties of hydrogen storage alkaline amides XNH₂ (X = Li, Na) compounds

    Alkaline amides XNH₂ (X = Li, Na) were studied to assess their potential for hydrogen storage applications using first-principles calculations. Structural analyses revealed that LiNH₂ crystallizes in a tetragonal structure (space group I-4), while NaNH₂ adopts an orthorhombic structure (space group Fddd). The electronic band structure, calculated using the Generalized Gradient Approximation (GGA), Local Density Approximation (LDA), and Engel-Vosko Generalized Gradient Approximation (EV-GGA), shows that both materials are wide-bandgap semiconductors with bandgap values of 4.45 eV for LiNH₂ and 3.97 eV for NaNH₂. The valence bands are dominated by [NH₂]⁻ states, which play a critical role in hydrogen storage. The mechanical stability of both compounds was confirmed by elastic constants, with LiNH₂ exhibiting superior mechanical strength compared to NaNH₂. Phonon dispersion analysis verified the dynamic stability of both materials. Optical properties, such as refractive index, reflectivity, and absorption coefficient, were evaluated, revealing high optical contrast, making these materials promising for optoelectronic applications. Thermal behavior analysis indicated that increasing temperature leads to higher entropy and internal energy, and lower free energy, favoring hydrogen desorption. The gravimetric hydrogen storage capacities were calculated as 8.78 wt% for LiNH₂ and 5.17 wt% for NaNH₂, highlighting their potential for energy storage. This study provides novel insights into the structural, electronic, mechanical, optical, and thermal properties of XNH₂, positioning LiNH₂ as a promising candidate for hydrogen storage and optoelectronic applications.

    Citation

    Hamida Latelli , , (2025-01-06), Electronic structure, mechanical and optical properties of hydrogen storage alkaline amides XNH₂ (X = Li, Na) compounds, International Journal of Hydrogen Energy, Vol:102, Issue:102, pages:1480-1496, Elsevier

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  • 2024-12-25
  • 2024-12-25

    Substrate Effect On Photoelectrochemicel And Semicondictrise Properties Of Lead Oxide In 0.5 M H2SO4

    This work focuses on the photoelectrochemical and semicondictrise study ofthe corrosion layer formed in the dark on Lead and lead-tin alloys in a 0.5Msulfuric acid solution: Electrochemical Impedance Spectroscopy (EIS), LinearSweeping Voltage (LSV), Mott-Schottky plots and photocurrent measurements.The composition was determined respectively by XRD diffraction and SEMelectron microscopy. The findings indicate that the incorporation of tin leads toa reduction in the corrosion layer thickness while significantly enhancing itselectrical conductivity. This effect is attributed to the formation of conductive,non-photoactive tin oxides and the development of a compact interfacial thelayer separating the grid from the positive active material.

    Citation

    ACHOUR Dakhouche , AHMED Saoudi , Hamida Latelli , Tawfiq Dilmi, , (2024-12-25), Substrate Effect On Photoelectrochemicel And Semicondictrise Properties Of Lead Oxide In 0.5 M H2SO4, Journal of Renewable Energies, Vol:27, Issue:2, pages:14, Renewable Energy Development Centre

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  • 2024-10-20
  • 2024-10-20

    Experimental Study on Enhancing Lead Oxide Photoelectrochemical Efficiency with Tin Substrate Modifications for Renewable Energy Systems

    This work focuses on the photoelectrochemical ...

    Citation

    Hamida Latelli , , (2024-10-20), Experimental Study on Enhancing Lead Oxide Photoelectrochemical Efficiency with Tin Substrate Modifications for Renewable Energy Systems, Journal of Renewable Energies, Vol:3, Issue:2, pages:137-150, Renewable Energy Development Center

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