Search for dissertations about: "Oxidative ageing"

Showing result 16 - 20 of 28 swedish dissertations containing the words Oxidative ageing.

  2. 16. Transition metal dissolution from Li-ion battery cathodes

    Author : Yonas Tesfamhret; Reza Younesi; Erik J. Berg; Mark Huijben; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lithium-ion battery; Lithium-ion cathode; Transition metal dissolution; Atomic Layer Deposition; Inductively coupled plasma atomic emission spectroscopy; Cathode-electrolyte interaction; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Abstract : Lithium-ion batteries (LIBs) have become reliable electrochemical energy storage systems due to their relative high energy and power density, in comparison to alternative battery chemistries. The energy density of current LIBs is limited by the average operating voltage and capacity of oxide-based cathode materials containing a variety of transition metals (TM). READ MORE

  4. 17. Modelling the degradation processes in high-impact polystyrene during the first use and subsequent recycling

    Author : Francisco Vilaplana; Sigbritt Karlsson; Monika Ek; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Recycling; high-impact polystyrene; degradation; quality analysis; thermal analysis; vibrational spectroscopy; chromatography techniques; thermo-oxidation; reprocessing; dynamic mechanical properties; polybutadiene microstructure.; Polymer chemistry; Polymerkemi;

    Abstract : Polymers are subjected to physical and chemical changes during their processing, service life, and further recovery, and they may also interact with impurities that can alter their composition. These changes substantially modify the stabilisation mechanisms and mechanical properties of recycled polymers. READ MORE

  5. 18. Measuring degradation in cable insulation material under realistic operation conditions

    Author : Douglas Jutsell Nilsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : One of the challenges in laboratory investigation of degradation and ageing of HVDC cable insulation is related to securing, or in other words, imitating the real service environment of the material specimens. So far, the published data refer to experiments conducted in thermo-oxidative conditions, which is not the case during normal cable operation. READ MORE

  6. 19. Genes and Physiological Role of the Eukaryotic Nicotinamide Nucleotide Transhydrogenase

    Author : Eva Lagberg Arkblad; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Celegans; cDNA; gene structure; transhydrogenase; A acetabulum; expression pattern; NAD P H; deletion mutant; chromosomal localisation; methyl viologen;

    Abstract : Nicotinamide nucleotide transhydrogenase (NNT, EC 1.6.1. READ MORE

  7. 20. Characterisation of thermally induced degradation of high-temperature polymers and composites

    Author : Valeri Ivanov Petkov; Patrik Fernberg; Lars Pilgaard Mikkelsen; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymeric Composite Materials; Polymera kompositmaterial;

    Abstract : This project aimed to broaden the knowledge of high-temperature polymers and composites when exposed to elevated temperatures and an oxygen-containing atmosphere. The main accent has been on thermosetting polyimide resins reinforced with carbon fibers. READ MORE