Search for dissertations about: "cathode battery"

Showing result 1 - 5 of 52 swedish dissertations containing the words cathode battery.

2. 1. Nanotubes for Battery Applications

   Author : Sara Nordlinder; Kristina Edström; Torbjörn Gustafsson; M. Stanley Whittingham; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; vanadium oxide; nanotubes; lithium battery; Li-ion battery; XRD; PES; electrochemistry; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi;

   Abstract : Nanomaterials have attracted great interest in recent years, and are now also being considered for battery applications. Reducing the particle size of some electrode materials can increase battery performance considerably, especially with regard to capacity, power and rate capability. READ MORE

4. 2. LiFeSO4F as a Cathode Material for Lithium-Ion Batteries : Synthesis, Structure, and Function

   Author : Adam Sobkowiak; Fredrik Björefors; Kristina Edström; Anna Andersson; M. Rosa Palacin; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Li-ion battery; cathode; LiFeSO4F; tavorite; triplite; synthesis; performance; structure; coating; PEDOT; XRD; Mössbauer spectrocopy; SEM; TEM; electrochemistry; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

   Abstract : In this thesis, two recently discovered polymorphs of LiFeSO4F, adopting a tavorite- and triplite-type structure, were investigated as potential candidates for use as cathode materials in Li-ion batteries. The studies aimed at enriching the fundamental understanding of the synthetic preparations, structural properties, and electrochemical functionality of these materials. READ MORE

5. 3. Low-Cost Iron-Based Cathode Materials for Large-Scale Battery Applications

   Author : Anton Nytén; Josh Thomas; Jean-Marie Tarascon; Uppsala universitet; []
   Keywords : Inorganic chemistry; Li-ion battery; cathode material; lithium iron phosphate; lithium iron silicate; X-ray powder diffraction; Mössbauer spectroscopy; photoelectron spectroscopy; Oorganisk kemi;

   Abstract : There are today clear indications that the Li-ion battery of the type currently used worldwide in mobile-phones and lap-tops is also destined to soon become the battery of choice in more energy-demanding concepts such as electric and electric hybrid vehicles (EVs and EHVs). Since the currently used cathode materials (typically of the Li(Ni,Co)O2-type) are too expensive in large-scale applications, these new batteries will have to exploit some much cheaper transition-metal. READ MORE

6. 4. Cooperative Lithium-Ion Insertion Mechanisms in Cathode Materials for Battery Applications

   Author : Helen Björk; Tsutomo Ohzuku; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Li-ion battery; cathode materials; single-crystal; X-ray diffraction; delithiation; superlattice; phase transformation; charge-ordering; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

   Abstract : Understanding lithium-ion insertion/extraction mechanisms in battery electrode materials is of crucial importance in developing new materials with better cycling performance. In this thesis, these mechanisms are probed for two different potential cathode materials by a combination of electrochemical and single-crystal X-ray diffraction studies. READ MORE

7. 5. Anion redox processes in novel battery cathode materials investigated by soft X-ray spectroscopy

   Author : Felix Massel; Laurent Duda; Håkan Rensmo; Maria Hahlin; Kevin Smith; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; soft X-ray spectroscopy; X-ray absorption spectroscopy XAS ; resonant inelastic X-ray scattering RIXS ; lithium-ion battery LIB ; sodium-ion battery SIB ; anionic redox; cathode materials; layered manganese oxide; spinel LNMO;

   Abstract : This thesis presents experimental investigations of the electronic structure of emerging and novel cathode materials used in lithium- and sodium-ion batteries. The investigated materials include a range of oxide materials containing the elements nickel and manganese. READ MORE