Sökning: "solid oxide"

Visar resultat 21 - 25 av 305 avhandlingar innehållade orden solid oxide.

  1. 21. Strontium Titanate-based Anodes for Solid Oxide Fuel Cells

    Författare :Peter Blennow Tullmar; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kondenserade materiens egenskaper:elektronstruktur; spectroscopy; relaxation; magnetic resonance; supraconductors; magnetic and optical properties; electrical; Condensed matter:electronic structure; fasjämvikt; egenskaper termiska och mekaniska ; kristallografi; phase equilibria; Kondenserade materiens egenskaper:struktur; Condensed matter:stucture; thermal and mechanical properties; crystallography; infiltration; surfactant; ceria; Gd-doped ceria; redox stability; SOFC; ceramic anode; XRD; XANES; electrochemical impedance spectroscopy; defect chemistry; Nb-doped SrTiO3; electron microscopy; egenskaper elektriska; magnetiska och optiska ; supraledare; magnetisk resonans; spektroskopi; Inorganic chemistry; Oorganisk kemi; Electrochemistry; Elektrokemi; Energy research; Energiforskning; Composite materials; Kompositmaterial; Ceramic materials and powders; Keramiska material och pulver;

    Sammanfattning : The purpose for this work has been to develop new robust fuel electrodes for solid oxide fuel cells (SOFC). The aim was to find suitable ceramic materials or composites with promising properties for the use as SOFC anodes. LÄS MER

  3. 22. Study of solid oxide systems from first principles calculations : energetics and magnetic properties of native defects and dopants in ZrO2 and MgO

    Författare :Cecilia Århammar; Rajeev Ahuja; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  4. 23. Semiconductor-ionic Materials for Low Temperature Solid Oxide Fuel Cells

    Författare :Muhammad Afzal; Andrew R. Martin; Peter Lund; Hab. Armelle Ringuede; KTH; []
    Nyckelord :Semiconductor-ionic materials; electrolyte-layer free fuel cell; low temperature solid oxide fuel cell; fuel to electricity conversion; Schottky junction; theoretical and experimental curves; Halvledar-joniska material; elektrolytskikt-fri bränslecell; lågtemperatur fastoxidbränslecell; bränsle till elomvandling; Schottky junction; teoretiska och experimentella kurvor; Energy Technology; Energiteknik;

    Sammanfattning : Solid oxide fuel cell (SOFC) is considered as an attractive candidate for energy conversion within the fuel cell (FC) family due to several advantages including environment friendly, use of non-noble materials and fuel flexibility. However, due to high working temperatures, conventional SOFC faces many challenges relating to high operational and capital costs besides the limited selection of the FC materials and their compatibility issues. LÄS MER

  5. 24. Dynamic and quasi-stationary electrochromic response of amorphous tungsten oxide thin films : In situ combined electrochemical and optical measurements during lithium intercalation

    Författare :Edgar Alonso Rojas González; Gunnar Niklasson; Aline Rougier; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electrochromism; Optical absorption; Amorphous materials; Tungsten oxide; Electrochemical impedance spectroscopy; Color impedance spectroscopy; Intercalation; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

    Sammanfattning : Electrochromic (EC) materials can adjust their optical properties, reversibly, by means of an external electrical stimulus. They have relevant technological applications; for example, energy-efficient smart windows, which can adapt dynamically—according to the given environmental conditions—to control the heat and visible light fluxes between the interior and exterior of a building. LÄS MER

  7. 25. A study on nanophase functional materials : high Tcsuperconductors and Zinc Oxide

    Författare :Lingna Wang; KTH; []
    Nyckelord :;

    Sammanfattning : Nanophase materials are an active materials research topicthat has received a great deal of attention over the past fewyears. Tlus mesis deals mainly with the synthesis, processing,and characterization of nanophase functional materials. Twotypes of functional materials were considered: high temperaturesuperconducting oxides (HTSC) and Wnc oxide. LÄS MER