Sökning: "Daniel Brandell"

Visar resultat 1 - 5 av 31 avhandlingar innehållade orden Daniel Brandell.

  1. 1. Understanding Ionic Conductivity in Crystalline Polymer Electrolytes

    Författare :Daniel Brandell; Josh Thomas; Torbjörn Gustafsson; Peter G. Bruce; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Polymer electrolyte; molecular dynamics; conductivity mechanism; aliovalent anion substitution; smectic; nematic; polymer chain length; Kemi; Chemistry; Kemi;

    Sammanfattning : Polymer electrolytes are widely used as ion transport media in vital applications such as energy storage devices and electrochemical displays. To further develop these materials, it is important to understand their ionic conductivity mechanisms. LÄS MER

  2. 2. The Electrochemistry of LiNi0.5-xMn1.5+xO4-δ in Li-ion Batteries : Structure, Side-reactions and Cross-talk

    Författare :Burak Aktekin; Kristina Edström; Daniel Brandell; Wolfgang Zipprich; Fernanda Lodi Marzano; Christian Masquelier; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LNMO; High-voltage spinel; FEC; Cross-talk; Cation ordering; Oxygen deficiency; Anionic redox; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Sammanfattning : The use of Li-ion batteries in portable electronic products is today widespread and on-going research is extensively dedicated to improve their performance and energy density for use in electric vehicles. The largest contribution to the overall cell weight comes from the positive electrode material, and improvements regarding this component thereby render a high potential for the development of these types of batteries. LÄS MER

  3. 3. Block Copolymer Electrolytes : Polymers for Solid-State Lithium Batteries

    Författare :Andreas Bergfelt; Tim Bowden; Daniel Brandell; Yoichi Tominaga; Uppsala universitet; []

    Sammanfattning : The use of solid polymer electrolytes (SPEs) for lithium battery devices is a rapidly growing research area. The liquid electrolytes that are used today are inflammable and harmful towards the battery components. LÄS MER

  4. 4. Avoiding ageing : Surface degradation of commercial electrode materials in lithium-ion batteries

    Författare :Erik Björklund; Kristina Edström; Daniel Brandell; Reza Younesi; Frank Renner; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Li-ion battery; Ageing; Photoelectron spectroscopy; Nickel Manganese Cobalt Oxide;

    Sammanfattning : The battery market today expands rapidly, not least for electric vehicles. But to compete against the combustion engine, the cost of batteries must be reduced. After years of usage, the batteries degrade and need to be exchanged, increasing the cost over the vehicle lifecycle. LÄS MER

  5. 5. Organic Electrode Battery Materials : A Journey from Quantum Mechanics to Artificial Intelligence

    Författare :Rodrigo P. Carvalho; Moyses Araujo; Daniel Brandell; Susanne Mirbt; Wolfgang Wenzel; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Batteries; Artificial Intelligence; Organic electrodes; High-voltage cathode materials; Machine learning; Materials discovery; High throughput screening; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Batteries have become an irreplaceable technology in human life as society becomes progressively more dependent on electricity. The demand for novel battery technologies has increased fast, especially with the popularisation of different portable devices. LÄS MER