Sökning: "Electrochemical electrodes"

Visar resultat 6 - 10 av 230 avhandlingar innehållade orden Electrochemical electrodes.

  1. 6. Innovative Electrolytes and Electrodes for Sodium-Ion Batteries

    Författare :Damien Monti; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; electrolytes; Sodium-ion batteries; ionic liquids; electrodes;

    Sammanfattning : Batteries are expected to be masterpieces for future large-scale energy storage, but the emergence of ecological and financial concerns has forced us to think about complementary battery technologies to the today outstanding lithium-ion batteries (LIBs). Therefore, the sodium-ion battery (SIB) is a concept worth studying - especially for large-scale applications due to the abundance of sodium as an element, the overall low cost anticipated, and the similarities with LiBs, which should ease a technology change. LÄS MER

  3. 7. MEMS-based electrochemical gas sensors and wafer-level methods

    Författare :Hithesh K Gatty; Göran Stemme; Roxhed Niclas; Anita Lloyd Spetz; KTH; []
    Nyckelord :MEMS; gas sensors; electrochemical; nitric oxide; hydrogen sulphide; nafion; nano;

    Sammanfattning : This thesis describes novel microel ectromechanical system (MEMS) based electrochemical gas sensors and methods of fabrication.This thesis presents the research in two parts. In the first part, a method to handle a thin silicon wafer using an electrochemically active adhesive is described. LÄS MER

  4. 8. Microstructure in SOFC: electrochemical simulations and experiments

    Författare :Xiaoqiang Zhang; Värmeöverföring; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solid oxide fuel cell; Electrochemical impedance spectroscopy; 3D reconstruction; Tortuosity; Electrochemical kinetics; Multiphysics; Thermal stress;

    Sammanfattning : Solid oxide fuel cells (SOFCs) are highly efficient and environmentally friendly power sources that convert chemical energy directly into electricity and heat, without the need for combustion. Despite their many benefits, the performance and durability of SOFCs heavily depend on the quality of their porous anode and cathode components. LÄS MER

  5. 9. From Current Collectors to Electrodes : Aluminium Rod Structures for Three-dimensional Li-ion Micro-battery Applications

    Författare :Gabriel Oltean; Kristina Edström; Leif Nyholm; Erik Kelder; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 3D micro-batteries; aluminium; titanium oxide; current collectros; negative electrodes; electrodepostion; electrophoretic depostion; sol-gel synthesis;

    Sammanfattning : The potential use of 3D aluminium nanorod structures as current collectors and negative electrodes for 3D Li-ion micro-batteries was studied based on the use of relatively simple and cost-effective electrochemical and sol-gel deposition techniques.Aluminium rod structures were synthesised by galvanostatic electrodeposition using commercial porous membranes as templates. LÄS MER

  7. 10. Transient electrochemical methods for investigation of porous battery electrodes

    Författare :Anton Lundqvist; KTH; []
    Nyckelord :electrochemical iimpedance spectroscopy; limn2o4; mathematical modelling; metal hydride; mcroelectrode; porous electrode; potential step; state of charge;

    Sammanfattning : This thesis treats electrochemical methods used to studybattery materials. Two different types of materials are used asmodel systems in this study, metal hydride alloys used in thenickel-metal hydride battery and LiMn2O4suggested for use in the lithium-ion battery. Thetwo model systems are used to critically analyse differentexperimental methods. LÄS MER