We report a facile method for the fabrication of TiO2 nanofiber-nanoparticle composite (FP) via. simulta- neous electrospraying and electrospinning for dye-sensitized solar cell (DSC) applications. The loading of ...We report a facile method for the fabrication of TiO2 nanofiber-nanoparticle composite (FP) via. simulta- neous electrospraying and electrospinning for dye-sensitized solar cell (DSC) applications. The loading of nanoparticles on the fibers is controlled by varying their feed rates during electrospinning. The FP composites having three different particle loading are prepared by the methodology and the FP with the highest particle loading (denoted as FP-3 in the manuscript) showed the best overall efficiency of 9.15% in comparison to the other compositions of the FP (FP-2, 8.15% and FP-1, Z51%, respectively) and nanofibers (F) and nanoparticles (P) separately (7.21 and 7.81, respectively). All the material systems are characterized by spec- troscopy, microscopy, surface area measurements and the devices are characterized by current-voltage (I-V), incident photon-to-current conversion efficiency (IPCE), electrochemical impedance measurements, etc. I-V, dye-loading and reflectance measurements throw light on the overall performance of the DSC devices.展开更多
The present study provides detailed experimental results on the synthesis and characterization of carbonized lithium titanate spinel(LTO) composites as electrode materials for lithium ion capacitor.The LTO particles...The present study provides detailed experimental results on the synthesis and characterization of carbonized lithium titanate spinel(LTO) composites as electrode materials for lithium ion capacitor.The LTO particles were grafted with a porous carbon layer obtained from the pyrolysis of camphor.The graphitic nature of the carbon was confirmed through Raman spectroscopy.The relative contributions from the capacitive and diffusion controlled processes underlying these electrodes were mathematically modeled.Electron transport mechanism underlying these electrodes was determined by measuring the work functions(φ) of LTO and carbon grafted LTO using ultraviolet photoelectron spectroscopy.These carbon grafted LTO composites exhibited an energy density of 330 m Wh L-1and a peak power density of 2.8 k W L-1,when employed as electrodes in coin cells with excellent cycling stability at the end of 4000 cycles.展开更多
基金supported by Ministry of New and Renewable Energy(MNRE)the Solar Energy Research Initiative(SERI),respectively.of Govt.of India
文摘We report a facile method for the fabrication of TiO2 nanofiber-nanoparticle composite (FP) via. simulta- neous electrospraying and electrospinning for dye-sensitized solar cell (DSC) applications. The loading of nanoparticles on the fibers is controlled by varying their feed rates during electrospinning. The FP composites having three different particle loading are prepared by the methodology and the FP with the highest particle loading (denoted as FP-3 in the manuscript) showed the best overall efficiency of 9.15% in comparison to the other compositions of the FP (FP-2, 8.15% and FP-1, Z51%, respectively) and nanofibers (F) and nanoparticles (P) separately (7.21 and 7.81, respectively). All the material systems are characterized by spec- troscopy, microscopy, surface area measurements and the devices are characterized by current-voltage (I-V), incident photon-to-current conversion efficiency (IPCE), electrochemical impedance measurements, etc. I-V, dye-loading and reflectance measurements throw light on the overall performance of the DSC devices.
基金Indian Space Research Organization (ISRO),Government of India is gratefully acknowledged for their financial support
文摘The present study provides detailed experimental results on the synthesis and characterization of carbonized lithium titanate spinel(LTO) composites as electrode materials for lithium ion capacitor.The LTO particles were grafted with a porous carbon layer obtained from the pyrolysis of camphor.The graphitic nature of the carbon was confirmed through Raman spectroscopy.The relative contributions from the capacitive and diffusion controlled processes underlying these electrodes were mathematically modeled.Electron transport mechanism underlying these electrodes was determined by measuring the work functions(φ) of LTO and carbon grafted LTO using ultraviolet photoelectron spectroscopy.These carbon grafted LTO composites exhibited an energy density of 330 m Wh L-1and a peak power density of 2.8 k W L-1,when employed as electrodes in coin cells with excellent cycling stability at the end of 4000 cycles.