CRIS

Permanent URI for this communityhttps://cris.ute.edu.ec/handle/123456789/1

Browse

Settings

Author: search.filters.author.Hamed RahimiStart date: 2024

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Reduced graphene oxide blended transition metal oxides anode material to uplift performance of the next generation Li-ion storage
    (Elsevier BV, 2026-03)
    Muhammad Awais Mughal
    ;
    Tauseef Anwar
    ;
    Reza Behmadi
    ;
    Hamed Rahimi
    ;
    Nayab Mughal
    Lithium-ion batteries (LIBs) have emerged as a leading energy storage technology, powering everything from portable electronics to electric vehicles due to their high energy density, long cycle life, and low maintenance requirements. Growing demand for high-energy applications has exposed limitations in conventional electrode materials, driving the search for alternatives that offer higher capacity, better stability, and lower costs. Among these, binary transition metal oxides (BMOs) has gained significant attention as a promising anode material because of its excellent safety, non-toxicity, natural abundance, and environmental compatibility. Despite these advantages, BMOs suffers from inherently low electrical conductivity, which restricts electron transport and leads to poor rate performance—a major barrier to its widespread adoption in commercial batteries. To address these challenges, researchers have developed innovative strategies, such as combining BMOs with conductive additives like carbon or graphene to enhance electron transfer, engineering nanostructured morphologies to shorten ion diffusion pathways, and designing hybrid composites that leverage the strengths of multiple materials. Notably, graphene-based modifications have proven particularly effective, as graphene's exceptional conductivity, mechanical flexibility, and large surface area not only improve charge transfer but also mitigate volume expansion during cycling. These advances have significantly boosted the electrochemical performance of the BMO based-anode material, enabling higher capacities and longer lifespans. This review examines the progress in optimizing BMOs with a focus on graphene-enhanced composites that push the boundaries of rate capability and cycling stability. By analyzing recent breakthroughs and remaining obstacles, we highlight the path forward for developing next-generation LIBs that meet the escalating demands of modern energy storage.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Controllable synthesis of nanostructured flower-like cadmium sulfides for photocatalytic degradation of methyl orange under different light sources
    (Elsevier BV, 2024-03)
    Akbar Hojjati-Najafabadi
    ;
    Elahe Farahbakhsh
    ;
    Golnaz Gholamalian
    ;
    Peizhong Feng
    ;
    Fatemeh Davar
    This study focuses on the synthesis and characterization of cadmium sulfide nanostructures by coprecipitation method. The materials are characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared, and Raman spectroscopy. The bandgap of the nanostructures was calculated under different conditions ranged between 2.8 and 2.4 eV and the materials have flower-like morphology in a cubic crystal system. Photocatalytic degradation of methyl orange dye was investigated under different radiation sources (sunlight, ultraviolet light, xenon light, and sunlight simulator). The effect of pH, initial dye concentration, and photocatalyst concentration on dye degradation was examined to show good degradation performance upon exposure to sunlight, UV light and visible light radiation. The results showed that by reducing the pH, degradation was improved, showing good performance at pH 3 with 85 % within 90 min. In addition, the optimal conditions for dye degradation were observed at concentration of 10 mg, methyl orange dye initial concentration of 10 g/L, and pH of 3. A 100 % degradation of methyl orange dye occurred in 90 min of visible light radiation, suggesting the potentiality of cadmium sulfide nanostructures under the effect of UV irradiation for cleaner production and complete elimination of the dye from polluted water sources, thus contributing to environmental enhancement.