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Unique oblate-like ZnWO4 nanostructures for electrochemical energy storage performances
摘要： Unique ZnWO4 oblate nanospheres (ZWO-ONSs) deposited on Nickel foam (Ni foam) are successfully prepared via facile hydrothermal route. The ZWO-ONSs show high specific surface area of 89.47 m2g-1. The as-prepared nanostructures tested in 3 M KOH aqueous solution, perform excellent electrochemical performances showing specific capacity of 1198 Fg-1 at 1 Ag-1, and high retention rate cyclic stability 96.56% after 1000 cycles at 10 Ag-1. Distinctive binary metal oxide nanoarchitectures are dynamic material for energy storage systems.
关键词： Supercapacitors,ZnWO4,Oblate-like nanostructures,Structural,Energy storage and conversion
更新于2025-09-23 15:23:52
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Nanoporous Fe-doped BiVO4 Modified with MIL-53 (Fe) for Enhanced Photoelectrochemical Stability and Water Splitting Perfromances
摘要： Great interest has been attracted to enhancing the photoelectrochemical performances of BiVO4. However, there have rarely been reported about addressing their PEC stability. Herein, it is proposed that Fe ions doping could enhance the stability and PEC performances of BiVO4, which may because it could improve the crystalline structure and eliminates the crystal defects of BiVO4. Moreover, it is found that metal–organic framework can play a co-catalyst role during the PEC experiments. We designed and fabricated nanoporous Fe-doped BiVO4 modified with MIL-53(Fe), which exhibits much higher PEC performance and stability than pristine BiVO4 and Fe-doped BiVO4. It is believed that MIL-53(Fe) can capture the photogenerated holes and thus facilitates the charge separation efficiency.
关键词： BiVO4,MIL-53(Fe),Stability,Nanocomposites,Energy storage and conversion,Photoelectrochemical
更新于2025-09-23 15:23:52
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Preparation and Comparison of Hybridized WO3-V2O5 Nanocomposites Electrochemical Supercapacitor performance in KOH and H2SO4 Electrolyte
摘要： The rod shape WO3-V2O5 hybrid nanocomposites were prepared by microwave assisted wet chemical route. The electrochemical investigations of as-prepared composites were carried in two electrolytes such as KOH and H2SO4 for comparison. Their maximum capacitance was calculated as 44 F/g for WO3 and 173 F/g for WO3-V2O5 composites in KOH electrolyte and its efficiency is 100 % up to 5000 cycles and its capacitance retention is 126% in KOH electrolyte. In H2SO4 electrolyte, the specific capacitance of WO3 was recorded as 246 F/g and WO3-V2O5 showed poor performance such as less than 12 F/g.
关键词： Energy storage and conversion,supercapacitor,hybrid composites,WO3-V2O5
更新于2025-09-23 15:21:21
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Effect of Na2S soaking on the properties of Cu2ZnSn(S,Se)4 films and solar cells
摘要： In this paper, we propose a Na2S soaking process (used as post-treatment process for the precursor films) for the non-vacuum prepared Cu2ZnSn(S,Se)4 (CZTSSe) films. The CZTSSe film prepared without this process show triple-layer structure in which fine-grain layer and obvious layer-boundaries exist. By soaking the precursor film in Na2S aqueous solution with suitable concentration, the fine-grain layer in the triple-layer structure is substituted by a small-grain layer and the layer-boundaries become continuous. We find the quantum efficiencies of the solar cells in long wavelength region are improved by the Na2S soaking. Therefore, the short-circuit currents of the solar cells are significantly increased. By using the Na2S soaking process, CZTSSe solar cells with the best efficiency of 11.5% have been prepared.
关键词： Solar cell,Thin films,Cu2Zn(S,Se)4,Energy storage and conversion
更新于2025-09-23 15:21:01
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Surfactant mediated TiO2 photoanodes and Cu2ZnSnS4 counter electrodes for high efficient dye sensitized solar cells
摘要： Highly crystallized kesterite Cu2ZnSnS4 (CZTS) nanoparticles with an energy band gap of 1.54 eV and desired elemental compositions were prepared by hydrothermal method. CZTS thin films were prepared on titanium tetrachloride (TiCl4) treated fluorine doped tin oxide (FTO) substrate by doctor blade coating method. Morphological developments of hydrothermal synthesized, sodium dodecyl sulfate (SDS) mediated, TiO2 nanostructured thin films on TiCl4 treated FTO substrate were investigated. The CZTS/FTO counter electrodes (CSs) and TiO2 nanostructured photoanodes were employed in dye sensitized solar cells (DSSCs). DSSCs device with power conversion efficiency of 6.24% have been fabricated. The TiCl4 treated CZTS CEs and SDS mediated TiO2 nanostructure photoanodes provides suitable electrodes for low cost and high efficient dye sensitized solar cells.
关键词： Thin films,CZTS counter electrode,Energy storage and conversion,Nanocrystalline materials,Dye sensitized solar cell
更新于2025-09-16 10:30:52
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Voltage-assisted SILAR deposition of CdSe quantum dots into mesoporous TiO2 film for quantum dot-sensitized solar cells
摘要： CdSe quantum dots (QDs) grows slowly in mesoporous TiO2 film deriving from a large lattice mismatch (11 %) and poor interaction between the two, which resulting the low power conversion efficiency (PCE) of quantum dot-sensitized solar cells (QDSSCs). An external voltage is applied in the successive ionic layer adsorption reaction (SILAR) process, which drives the Cd2+ and SeSO3 2- ions quickly diffused into the mesoporous TiO2 film and reacted to form CdSe QDs at room temperature. The CdSe QDSSCs yields a PCE of 3.27%. This work provides an efficient strategy to assemble QDs for enhancing the performance of QDSSCs.
关键词： Electrodeposition,Semiconductors,Energy storage and conversion,Solar energy materials,Nanoparticles
更新于2025-09-11 14:15:04