Sökning: "Manganese oxide."
Visar resultat 21 - 25 av 61 avhandlingar innehållade orden Manganese oxide..
21. Fiber Optic Sensors for Monitoring of Lithium- and Sodium-ion Batteries
Sammanfattning : Rechargeable batteries, particularly lithium-ion batteries, have rapidly evolved since their introduction and now dominate the market, owing primarily to their high energy and power densities. With growing demand for high-performance batteries in portable electronics and electric vehicles, the need for safe, efficient, and reliable batteries is crucial. LÄS MER
22. Metal Oxide Nanoparticles for Contrast Enhancement in Magnetic Resonance Imaging : Synthesis, Functionalization and Characterization
Sammanfattning : This thesis work focuses on the design and production of nanoparticle based contrast agents for signal enhancement in magnetic resonance imaging (MRI). Three different synthesis routes are explored, primarily to produce crystalline gadolinium oxide (Gd2O3) nanoparticles, and surface modification is done to obtain stable, dispersible, biocompatible probes inducing high proton relaxivities. LÄS MER
23. Avoiding ageing : Surface degradation of commercial electrode materials in lithium-ion batteries
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
24. Coated Ferritic Stainless Steels as Interconnects in Solid Oxide Fuel Cells
Sammanfattning : Solid oxide fuel cells (SOFCs) have gained increased research interest as they arepromising devices for a decentralized and clean electricity and heat production. Severalmaterial challenges have to be solved to reach sufficient efficiencies and life times. LÄS MER
25. Innovative Oxygen Carriers for Chemical-looping Combustion
Sammanfattning : Chemical-looping combustion (CLC) and chemical-looping with oxygen uncoupling (CLOU) are combustion technologies where carbon dioxide is inherently obtained in pure form without any gas separation step. In the processes, fuel is introduced to the fuel reactor and combustion air is introduced to the air reactor. LÄS MER