Search for dissertations about: "material cycling"

Showing result 21 - 25 of 168 swedish dissertations containing the words material cycling.

2. 21. Photochemical alterations of dissolved organic matter : Impact on heterotrophic bacteria and carbon cycling in lakes

   Author : Stefan Bertilsson; Linköpings universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

   Abstract : Globally, the amount of carbon in dissolved organic matter (DOM) is similar to the total amount in the atmosphere. DOM also plays a key role in structuring natural surface waters and affects the physical, chemical, and biological character of these systems. READ MORE

4. 22. 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. 23. Conducting Redox Polymers for Electrical Energy Storage : Backbone - Substituent Interactions in Quinone Polypyrrole Model Systems

   Author : Christoffer Karlsson; Martin Sjödin; Petr Novák; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Organic energy storage; Hydroquinone polymers; Functionalized polypyrrole; Spectroelectrochemistry; Electrochemical quartz crystal microbalance; In situ conductivity;

   Abstract : Organic electrical energy storage (EES) is a growing field of research that is expected to play an important role in the future, as the need for sustainable EES increases. Conducting redox polymers (CRPs), i.e. conducting polymers with incorporated redox active moieties e. READ MORE

6. 24. Terephthalate-Functionalized Conducting Redox Polymers for Energy Storage Applications

   Author : Li Yang; Martin Sjödin; Maria Strømme; Hiroyuki Nishide; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; conducting polymers; terephthalate; polythiophene; PEDOT; conductance;

   Abstract : Organic electrode materials, as sustainable and environmental benign alternatives to inorganic electrode materials, show great promise for achieving cheap, light, versatile and disposable devices for electrical energy storage applications. Conducting redox polymers (CRPs) are a new class of organic electrode materials where the charge storage capacity is provided by the redox chemistry of functional pendent groups and electronic conductivity is provided by the doped conducting polymer backbone, enabling the production of energy storage devices with high charge storage capacity and high power capability. READ MORE

7. 25. Towards quinone/pEDOT conducting redox polymers as energy storage materials

   Author : Huan Wang; Martin Sjödin; Xavier Crispin; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; quinone; conducting redox polymer; doping; capacity; organic battery; polymerization;

   Abstract : With the increased demand for electrical energy storage devices, e.g. electric vehicles and smart grids, organic batteries have caught increasing attention due to their advantages, such as sustainability, environmental friendliness and cheap raw materials over traditional inorganic energy storage materials. READ MORE