Sökning: "ionic-conductivity"

Visar resultat 1 - 5 av 88 avhandlingar innehållade ordet ionic-conductivity.

  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

  3. 2. Functionalization of polymer electrolytes for electrochromic windows

    Författare :İlknur Bayrak Pehlivan; Gunnar A. Niklasson; Claes-Göran Granqvist; Michel Aegerter; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrochromism; Polymer electrolytes; PEI; LiTFSI; Nanoparticles; Ionic conductivity; Ion-pair relaxation; Near-infrared absorption; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

    Sammanfattning : Saving energy in buildings is of great importance because about 30 to 40 % of the energy in the world is used in buildings. An electrochromic window (ECW), which makes it possible to regulate the inflow of visible light and solar energy into buildings, is a promising technology providing a reduction in energy consumption in buildings along with indoor comfort. LÄS MER

  4. 3. The Art of Cycling – Polymer Electrolytes at Extreme Conditions

    Författare :Isabell L. Johansson; Jonas Mindemark; Daniel Brandell; Masayoshi Watanabe; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Solid polymer electrolytes; Lithium ion batteries; Electrochemical stability; Mechanical stability; Ionic conductivity; Additives; Polycarbonate; Polyester; Polyketone; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

    Sammanfattning : With the rapid development of batteries for applications like electric vehicles and energy storage devices, it is essential to design and develop batteries with improved safety, long cycle life, and high energy density. To achieve this goal, the development and improvement of solid-state batteries, containing solid polymer electrolytes, is a promising solution. LÄS MER

  5. 4. Simulating ion transport in electrolyte materials with physics-based and machine-learning models

    Författare :Yunqi Shao; Chao Zhang; Peter Broqvist; Carl Nettelblad; Barbara Kirchner; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; electrolytes; ionic conductivity; ion transport; molecular dynamics; machine learning potential; proton transfer; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Sammanfattning : Electrolytes are indispensable components of electrochemical devices such as batteries, fuel cells, and supercapacitors, and the mass transport in electrolytes is one of the most important design focuses of such devices. A microscopic picture of ion transport is essential to link the chemical properties of electrolyte materials to their electrochemical applications. LÄS MER

  7. 5. Innovative Electrolytes for Safer Sodium-Ion Batteries

    Författare :Damien Monti; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Raman spectroscopy; safety; Sodium-ion batteries; ionic liquids; organic solvents; electrolytes; ionic conductivity; electrochemistry.; electrodes;

    Sammanfattning : The overconsumption of non-renewable/fossil fuels by vehicles and industry has resulted in dangerously high levels of CO2 in the atmosphere the last 40 years. The impact on the environment, climate and public health urge governments to find new technologies to ensure a sustainable development. LÄS MER