Sökning: "Li-ion battery cathode materials"
Visar resultat 1 - 5 av 23 avhandlingar innehållade orden Li-ion battery cathode materials.
1. Transition metal dissolution from Li-ion battery cathodes
Sammanfattning : 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). LÄS MER
2. LiFeSO4F as a Cathode Material for Lithium-Ion Batteries : Synthesis, Structure, and Function
Sammanfattning : 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. LÄS MER
3. Surface Phenomena in Li-Ion Batteries
Sammanfattning : The formation of surface films on electrodes in contact with non-aqueous electrolytes in lithium-ion batteries has a vital impact on battery performance. A basic understanding of such films is essential to the development of next-generation power sources. LÄS MER
4. A Quest for the Unseen : Surface Layer Formation on Li4Ti5O12 Li-Ion Battery Anodes
Sammanfattning : The electric vehicle itself today outlives its battery, necessitating battery replacement. Lithium titanium oxide (LTO) has, in this context, been suggested as a new anode material in heavy electric vehicle applications due to intrinsic properties regarding safety, lifetime and availability. LÄS MER
5. Cooperative Lithium-Ion Insertion Mechanisms in Cathode Materials for Battery Applications
Sammanfattning : 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. LÄS MER