Sökning: "PES"

Visar resultat 6 - 10 av 90 avhandlingar innehållade ordet PES.

  1. 6. Insights in Li-ion Battery Interfaces through Photoelectron Spectroscopy Depth Profiling

    Författare :Bertrand Philippe; Kristina Edström; Danielle Gonbeau; Hakan Rensmo; Rémi Dedryvère; Rosa Palacin; Maria Alfredsson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Lithium-ion batteries; negative electrodes; silicon; MnSn2; SEI; PES; XPS; synchrotron; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Sammanfattning : Compounds forming alloys with lithium, such as silicon or tin, are promising negative electrode materials for the next generation of Li-ion batteries due to their higher theoretical capacity compared to the current commercial electrode materials.An important issue is to better understand the phenomena occurring at the electrode/electrolyte interfaces of these new materials. LÄS MER

  3. 7. A Quest for the Unseen : Surface Layer Formation on Li4Ti5O12 Li-Ion Battery Anodes

    Författare :Tim Nordh; Kristina Edström; Daniel Brandell; Carl Tangstedt; Miguel Ángel Muños; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SEI; LTO; XPS; PES; Surface Layer; Titanate; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

    Sammanfattning : The electric vehicle itself today outlives its battery, necessitating battery replacement. Lithium titanium oxide (LTO) has, in this context, been suggested as a new anode material in heavy electric vehicle applications due to intrinsic properties regarding safety, lifetime and availability. LÄS MER

  4. 8. Electronic Structures and Energy Level Alignment in Mesoscopic Solar Cells : A Hard and Soft X-ray Photoelectron Spectroscopy Study

    Författare :Rebecka Lindblad; Håkan Rensmo; Hans Seigbahn; Anders Hagfeldt; Erik Johansson; Marcus Bär; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Photoelectron spectroscopy; HAXPES; PES; XPS; electronic structure; energy level alignment; mesoscopic solar cell; hole conductor; perovskite; dye-sensitized; semiconductor-sensitized; TiO2; ZnO; spiro-OMeTAD; P3HT; DEH; metal sulfide; Li-TFSI; Co III complex; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Photoelectron spectroscopy is an experimental method to study the electronic structure in matter. In this thesis, a combination of soft and hard X-ray based photoelectron spectroscopy has been used to obtain atomic level understanding of electronic structures and energy level alignments in mesoscopic solar cells. LÄS MER

  5. 9. Characterization and Functionalization of 2D Overlayers Adsorbed on Transition Metals

    Författare :May Ling Ng; Nils Mårtensson; Alexei Preobrajenski; Anne Borg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; h-BN; graphene; transition metals; nanomesh; functionalization; PES; NEXAFS; STM; LEED; Condensed matter physics; Kondenserade materiens fysik; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Two-dimensional layered materials, namely monolayer hexagonal boron nitride and graphene were grown by CVD on various transition metals. The physical and chemical properties of these systems were characterized systematically using synchrotron-based spectroscopic techniques, scanning tunneling microscopy and low energy electron diffraction. LÄS MER

  7. 10. Nanotubes for Battery Applications

    Författare :Sara Nordlinder; Kristina Edström; Torbjörn Gustafsson; M. Stanley Whittingham; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; vanadium oxide; nanotubes; lithium battery; Li-ion battery; XRD; PES; electrochemistry; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : Nanomaterials have attracted great interest in recent years, and are now also being considered for battery applications. Reducing the particle size of some electrode materials can increase battery performance considerably, especially with regard to capacity, power and rate capability. LÄS MER