Sökning: "Polymer electrolyte membrane"

Visar resultat 1 - 5 av 38 avhandlingar innehållade orden Polymer electrolyte membrane.

1. 1. Microphase Separated Cation Conducting Polymers : Design, Synthesis, and Properties

   Författare :Hannes Nederstedt; Centrum för analys och syntes; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Polymer; Litiumbatteri; Mikrofasseparering; Bränslceller; Elektrolyt; Polymerelektrolyt; Polymera bränslecellsmembran; Polymer electrolyte fuel cells; Polymer electrolyte; Polymer electrolyte membrane; Microphase separation; Lithium battery; Polymer; Fuel cell; Proton exchange membrane PEM ;

   Sammanfattning : This thesis describes the synthesis and properties of five different cation conducting polymer systems. These systems were designed so that the polymers would be able to microphase separate into distinct phases with one phase for mechanical strength and one for ionic conductivity. LÄS MER

3. 2. Exploring N-alicyclic quaternary ammonium functional polymers as hydroxide exchange membranes

   Författare :Joel Olsson; Centrum för analys och syntes; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrolyte membrane; Anion exchange membranes; Anion exchange membrane fuel cells; Structure-property relationship; Quaternary ammonium cations; Alkaline stability; Synthesis; Characterization;

   Sammanfattning : As the global power generation is shifted toward renewable and intermittent sources, the importance of fuel cells and other energy storage and conversion devices is continually increasing. However, many of these technologies are still under development and further research is necessary before they can be implemented. LÄS MER

4. 3. Novel Materials for Fuel Cells and Batteries Light Scattering Studies of the Structure and Dynamics of Polymer Electrolytes

   Författare :Hanna Ericson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; proton conducting polymer; Raman spectroscopy; gel electrolyte; photon correlation spectroscopy; fuel cell membrane; polymer electrolyte;

   Sammanfattning : The development of new materials and technologies for electrochemical energy conversion and storage, such as fuel cells and batteries, is important for a future more efficient use of energy. Polymer electrolytes are key components in polymer electrolyte fuel cells and lithium-based batteries. LÄS MER

5. 4. Modelling and Experimental Investigation of the Dynamics in Polymer Electrolyte Fuel Cells

   Författare :Katarina Wiezell; Göran Lindbergh; Lars Pettersson; Anders Dahlkild; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polymer electrolyte fuel cell; modelling; electrochemical impedance spectroscopy; water transport; membrane; Electrochemistry; Elektrokemi;

   Sammanfattning : In polymer electrolyte fuel cells (PEFC) chemical energy, in for example hydrogen, is converted by an electrochemical process into electrical energy. The PEFC has a working temperature generally below 100 °C. Under these conditions water management and transport of oxygen to the cathode are the parameters limiting the performance of the PEFC. LÄS MER

7. 5. Intrinsically Proton-Conducting Benzimidazole Units Tethered to Different Polymer Chain Architectures

   Författare :Christian Persson; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polymerteknik; biopolymers; Kemiteknik och kemisk teknologi; Polymer technology; Chemical technology and engineering; Materiallära; materialteknik; Material technology; Makromolekylär kemi; Macromolecular chemistry; proton-exchange membrane fuel cell; structure diffusion; thiol-ene reaction; segmental mobility; high temperature; benzimidazole; block copolymers; polymer electrolyte; anhydrous proton conductivity;

   Sammanfattning : Proton transport is a fundamental process that can be found in many systems in nature, as well as in technical devices, such as fuel cells, electrochromic devices and various types of sensors. Fuel cell technology is considered as environmentally friendly because fuel cells are not limited by the Carnot cycle, and efficiently converts chemical energy into electrical energy which can be used for powering cars, laptops, buildings etc. LÄS MER