Search for dissertations about: "impedance lithium"

Showing result 1 - 5 of 22 swedish dissertations containing the words impedance lithium.

  1. 1. Characterisation and modelling of lithium-ion battery electrolytes

    University dissertation from Stockholm : Kemiteknik

    Author : Peter Georén; KTH.; [2003]
    Keywords : lithium battery; electrolyte; characterisation; mass transport; stability; modelling; electrochemical; Raman spectroscopy; impedance;

    Abstract : Rechargeable batteries play an important role as energycarriers in our modern society, being present in wirelessdevices for everyday use such as cellular phones, video camerasand laptops, and also in hybrid electric cars. The batterytechnology dominating the market today is the lithium-ion(Li-ion) battery. READ MORE

  2. 2. Mathematical Models for Investigation of Performance, Safety, and Aging in Lithium-Ion Batteries

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Tommy Georgios Zavalis; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lithium-ion battery; modeling; electrochemical processes; impedance; polarization; performance; safety; aging; power optimized battery; litiumjonbatteri; modellering; elektrokemiska processer; impedans; polarisation; prestanda; säkerhet; åldring; effektoptimerat batteri;

    Abstract : Rechargeable lithium-ion batteries have both the power and energy capabilities to be utilized in hybrid electric vehicles and other power demanding applications. However, there are obstacles primarily related to reliability in safety and lifetime. Additionally, there is still room for improvement in the battery performance. READ MORE

  3. 3. Diagnosis of the Lifetime Performance Degradation of Lithium-Ion Batteries Focus on Power-Assist Hybrid Electric Vehicle and Low-Earth-Orbit Satellite Applications

    University dissertation from Stockholm : KTH

    Author : Shelley Brown; KTH.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; lithium-ion battery; LixNi0.8Co0.15Al0.05O2; LixMn2O4; LiyC6; ageing; three-electrode measurements; impedance modelling; surface film characterisation; hybrid electric vehicle; low-earth-orbit satellite; litiumjonbatteri; åldring; treelektroduppställning; impedansmodell; ytfilmskarakterisering; hybridfordon; satelliter; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Electrochemistry; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Elektrokemi;

    Abstract : Lithium-ion batteries are a possible choice for the energy storage system onboard hybrid electric vehicles and low-earth-orbit satellites, but lifetime performance remains an issue. The challenge is to diagnose the effects of ageing and then investigate the dependence of the magnitude of the deterioration on different accelerating factors (e.g. READ MORE

  4. 4. Kinetic investigation of LiMn2O4 for rechargeable lithium batteries

    University dissertation from Stockholm : Kemiteknik

    Author : Anna-Karin Hjelm; KTH.; [2002]
    Keywords : linear sweep voltammetry; electrochemical impedance spectroscopy; potential step; in situ X-ray diffraction; microelectrodes; electrode kinetics; LiMn2O4 cathode; rechargeable lithium batteries;

    Abstract : This thesis is concerned with kinetic characterisation of theinsertion compound LiMn2O4, which is used as positive electrodematerial in rechargeable lithium batteries. Three different typesof electrode configurations have been investigated, namely singleparticles, thin films and composite electrodes. Differentelectrochemical techniques, i.e. READ MORE

  5. 5. Electrochemical Studies of Aging in Lithium-Ion Batteries

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Matilda Klett; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aging; EIS modeling; electrolyte characterization; graphite; hybrid electric vehicles; impedance spectroscopy; LiFePO4; Li-ion batteries;

    Abstract : Lithium-ion batteries are today finding use in automobiles aiming at reducing fuel consumption and emissions within transportation. The requirements on batteries used in vehicles are high regarding performance and lifetime, and a better understanding of the interior processes that dictate energy and power capabilities is a key to strategic development. READ MORE