Search for dissertations about: "V6O13"

Found 5 swedish dissertations containing the word V6O13.

  2. 1. Lithium-ion insertion in a V6O13 cathode

    Author : Örjan Bergström; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; cathode material; vanadium oxide; lithium insertion; in situ X-ray diffraction; deformation electron density refinement; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : The transition metal oxide V6O13 is a promising cathode material for high-capacity lithium-polymer batteries in conjunction with a lithium-metal anode. The electro-chemical behaviour of V6O13 has its origin in the ability of the vanadium ions to change their-oxidation states, combined with the open nature of its crystal structure which allows lithium ions to diffuse through it. READ MORE

  4. 2. Chemical and electrochemical intercalation of lithium into a V6O13 host

    Author : Christina Lampe-Önnerud; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  5. 3. Resonant Soft X-Ray Emission Spectroscopy of Vanadium Oxides and Related Compounds

    Author : Thorsten Schmitt; Joseph Nordgren; Laurent Duda; Stefan Eisebitt; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; vanadium oxides; Li-battery; cathode materials; copper oxides; soft X-ray absorption; soft X-ray emission; resonant inelastic X-ray scattering; cluster model calculations; Fysik; Physics; Fysik;

    Abstract : This thesis addresses the electronic structure of vanadium and copper oxides using soft X-ray absorption (SXA) spectroscopy and resonant inelastic X-ray scattering (RIXS) at high brightness synchrotron radiation sources. In RIXS incident photons, tuned to the energy of specific absorption resonances, are inelastically scattered leaving behind a low energy valence excitation in the system studied. READ MORE

  6. 4. The Challenge of Probing Lithium Insertion Mechanisms in Cathode Materials

    Author : Jonas Höwing; Torbjörn Gustafsson; Christian Masquelier; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; Li-ion battery; cathode materials; insertion mechanism; single-crystal X-ray diffraction; vanadium oxide; lithium iron phosphate; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi;

    Abstract : The Li-ion battery has, from its commercialisation in the early 1990's, now become the most widely used power source for portable low-power electronics: laptops, cellular phones and MP3-players are a few examples. To further develop existing and find new electrode materials for these batteries, it is vital to understand the lithium insertion/extraction mechanisms taking place during battery operation. READ MORE

  7. 5. Cooperative Lithium-Ion Insertion Mechanisms in Cathode Materials for Battery Applications

    Author : Helen Björk; Tsutomo Ohzuku; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Li-ion battery; cathode materials; single-crystal; X-ray diffraction; delithiation; superlattice; phase transformation; charge-ordering; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Abstract : Understanding lithium-ion insertion/extraction mechanisms in battery electrode materials is of crucial importance in developing new materials with better cycling performance. In this thesis, these mechanisms are probed for two different potential cathode materials by a combination of electrochemical and single-crystal X-ray diffraction studies. READ MORE