The Experts below are selected from a list of 32724 Experts worldwide ranked by ideXlab platform

Weiqian Yang - One of the best experts on this subject based on the ideXlab platform.

  • nanostructured palladium silver coated nickel foam cathode for magnesium hydrogen peroxide fuel cells
    Electrochimica Acta, 2006
    Co-Authors: Weiqian Yang, Shaohua Yang
    Abstract:

    A novel multiscale pd-ag catalyzed porous cathode for the magnesium-hydrogen peroxide fuel cell was prepared by Electrodeposition of pd onto ag coated nickel foam surface from an aqueous solution of palladium chloride. the structure, morphology and composition of the electroDeposited catalyst layer were characterized using sem, eds and xps analysis. magnesium-hydrogen peroxide fuel cell tests with the pd-ag Deposited cathode were carried out and compared with the ag-Deposited Electrode. the effects of temperature, h2o2 flow rate and h2o2 concentration on cell performance were investigated, and the Electrode stability test was carried out. the pd-ag Deposited Electrode showed higher catalytic activity for the reduction of hydrogen peroxide than that of the ag-Deposited ni foam cathode, and gave much improved fuel cell performance. the magnesium-hydrogen peroxide fuel cell with nanostructured pd-ag coated nickel foam cathode presented a maximum power density of 140 mw cm(-2), but the mg-h2o2 fuel cell with ag coated ni foam cathode gave only 110 mw cm(-2) under the same operation condition. (c) 2006 elsevier ltd. all rights reserved.

Tianshou Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Ultra-low catalyst loading cathode Electrode for anion-exchange membrane fuel cells
    International Journal of Hydrogen Energy, 2012
    Co-Authors: Yinshi Li, Tianshou Zhao
    Abstract:

    A new cathode architecture for anion-exchange membrane fuel cells (AEMFCs) is proposed and fabricated by direct deposition of palladium (Pd) particles onto the surface of the micro-porous layer (MPL) that is interfaced with a backing layer. The MPL is composed of carbon nanotubes while the backing layer is made of a carbon paper. The sputter-Deposited Electrode with a worm-like shape not only extends the electrochemical active surface area, but also facilitates the oxygen transport. This new cathode, albeit with a Pd loading as low as 0.035 mg cm−2, enables the peak power density of an AEM direct ethanol fuel cell to be as high as 88 mW cm−2 (at 60 °C), which is even higher than that using a conventional cathode with a 15-times higher Pd loading. The significance of the present work lies in the fact that the new sputter-Deposited Electrode is more suitable for fuel-electrolyte-fed fuel cells than the conventional Electrode designed for proton-exchange membrane fuel cells (PEMFCs).

Stephen R Forrest - One of the best experts on this subject based on the ideXlab platform.

  • small molecular weight organic thin film photodetectors and solar cells
    Journal of Applied Physics, 2003
    Co-Authors: Peter Peumans, Aharon Yakimov, Stephen R Forrest
    Abstract:

    In this review, we discuss the physics underlying the operation of single and multiple heterojunction, vacuum-Deposited organic solar cells based on small molecular weight thin films. For single heterojunction cells, we find that the need for direct contact between the Deposited Electrode and the active organics leads to quenching of excitons. An improved device architecture, the double heterojunction, is shown to confine excitons within the active layers, allowing substantially higher internal efficiencies to be achieved. A full optical and electrical analysis of the double heterostructure architecture leads to optimal cell design as a function of the optical properties and exciton diffusion lengths of the photoactive materials. Combining the double heterostructure with novel light trapping schemes, devices with external efficiencies approaching their internal efficiency are obtained. When applied to an organic photovoltaic cell with a power conversion efficiency of 1.0%±0.1% under 1 sun AM1.5 illuminati...

Aharon Yakimov - One of the best experts on this subject based on the ideXlab platform.

  • small molecular weight organic thin film photodetectors and solar cells
    Journal of Applied Physics, 2003
    Co-Authors: Peter Peumans, Aharon Yakimov, Stephen R Forrest
    Abstract:

    In this review, we discuss the physics underlying the operation of single and multiple heterojunction, vacuum-Deposited organic solar cells based on small molecular weight thin films. For single heterojunction cells, we find that the need for direct contact between the Deposited Electrode and the active organics leads to quenching of excitons. An improved device architecture, the double heterojunction, is shown to confine excitons within the active layers, allowing substantially higher internal efficiencies to be achieved. A full optical and electrical analysis of the double heterostructure architecture leads to optimal cell design as a function of the optical properties and exciton diffusion lengths of the photoactive materials. Combining the double heterostructure with novel light trapping schemes, devices with external efficiencies approaching their internal efficiency are obtained. When applied to an organic photovoltaic cell with a power conversion efficiency of 1.0%±0.1% under 1 sun AM1.5 illuminati...

Shaohua Yang - One of the best experts on this subject based on the ideXlab platform.

  • nanostructured palladium silver coated nickel foam cathode for magnesium hydrogen peroxide fuel cells
    Electrochimica Acta, 2006
    Co-Authors: Weiqian Yang, Shaohua Yang
    Abstract:

    A novel multiscale pd-ag catalyzed porous cathode for the magnesium-hydrogen peroxide fuel cell was prepared by Electrodeposition of pd onto ag coated nickel foam surface from an aqueous solution of palladium chloride. the structure, morphology and composition of the electroDeposited catalyst layer were characterized using sem, eds and xps analysis. magnesium-hydrogen peroxide fuel cell tests with the pd-ag Deposited cathode were carried out and compared with the ag-Deposited Electrode. the effects of temperature, h2o2 flow rate and h2o2 concentration on cell performance were investigated, and the Electrode stability test was carried out. the pd-ag Deposited Electrode showed higher catalytic activity for the reduction of hydrogen peroxide than that of the ag-Deposited ni foam cathode, and gave much improved fuel cell performance. the magnesium-hydrogen peroxide fuel cell with nanostructured pd-ag coated nickel foam cathode presented a maximum power density of 140 mw cm(-2), but the mg-h2o2 fuel cell with ag coated ni foam cathode gave only 110 mw cm(-2) under the same operation condition. (c) 2006 elsevier ltd. all rights reserved.