Sökning: "oxygen ion conductivity"

Visar resultat 16 - 20 av 21 avhandlingar innehållade orden oxygen ion conductivity.

  1. 16. Doping of high-Al-content AlGaN grown by MOCVD

    Författare :Daniel Nilsson; Anelia Kakanakova- Georgieva; Erik Janzén; Michelle Moram; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : The high-Al-content AlxGa1-xN, x > 0.70, is the principal wide-band-gap alloy system to enable the development of light-emitting diodes operating at the short wavelengths in the deep-ultraviolet, λ < 280 nm. LÄS MER

  3. 17. Structure and physical properties of doped 123-superconductors and search for new superconducting hydrides

    Författare :Pieter Lundqvist; KTH; []
    Nyckelord :;

    Sammanfattning : The field of high temperature superconductors (HTSC) isstill controversial. The difficulty to explain the high Tcvalues as well as other anomalous superconductingand normal state properties of the HTSC’s necessitatesfurther studies and search for empirical relations in the largeamount of collected data. LÄS MER

  4. 18. Advanced Materials for Rechargeable Lithium Batteries

    Författare :Jae-Kwang Kim; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rechargeable lithium battery; rate capability; Organic electrode; cycle stability.; Ionic liquid-based polymer electrolyte; electrochemical stability;

    Sammanfattning : Lithium rechargeable batteries have gained much attention in the pursuit for alternative energy sources because of advantages such as high energy density and high electric potential. In addition, the development of low-cost materials has been of interest to reduce the cost of batteries, especially those destined for transportation applications such as electric (EVs) or hybrid-electric vehicles (HEVs). LÄS MER

  5. 19. Efficient electrocatalysts based on nitrrogen-doped carbon nanostructures for energy applications

    Författare :Tiva Sharifi; Thomas Wågberg; Pulickel Ajayan; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

    Sammanfattning : Carbon nanostructures have emerged as a key material in nanotechnology and continuously find new areas of applications. Particularly, they are attractive due to their excellent properties as support for catalyst nanostructures leading to highly efficient composite materials for various electrochemical applications. LÄS MER

  7. 20. High resolution microstructural characterization of oxide thin films and interfaces

    Författare :Nikolina Tuzla; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; oxides; Microstructure; TEM; thin films; interfaces; HAADF STEM; YSZ.; SrTiO3; 2DEG; LaAlO3; heterostructures;

    Sammanfattning : Oxide interfaces can introduce properties that are different compared to thecorresponding crystal bulk properties. The properties can be tuned by changing thestructure. It has become clear that these oxide interface systems are potentiallysuitable for future electronic devices with unique and tailored properties. LÄS MER