Sökning: "hydroxide exchange membrane"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden hydroxide exchange membrane.

1. 1. 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

3. 2. Towards alkali-stable polymers and hydroxide exchange membranes functionalized with alicyclic quaternary ammonium cations

   Författare :Thanh Huong Pham; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hydroxide exchange membrane; fuel cell; alicyclic quaternary ammonium; alkali-stable; high hydroxide conductivity; structure-property relationship;

   Sammanfattning : In the current work, cationic polymers functionalized with N-alicyclic quaternary ammonium (QA) cations were synthesized and characterized as potential hydroxide exchange membranes (HEMs) for application in fuel cells. Three different polymers, namely poly(arylene ether sulfone), spiro-ionene and poly(arylene alkylene), were explored as polymer backbones for the HEMs. LÄS MER

4. 3. Poly(phenylene oxide)s functionalized with cationic side chains: design, synthesis and properties as anion exchange membranes

   Författare :Hai-Son Dang; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; anion exchange membranes; Anion exchange membrane fuel cells; poly phenylene oxide s; hydroxide conductivity; alkaline stability; lithiation; Menshutkin reaction;

   Sammanfattning : Anion exchange membrane fuel cells (AEMFCs) are considered as one of the most important next-generation energy conversion technologies. AEMFCs convert chemical energy into useful electrical energy and have great potential forachieving high conversion efficiencies. LÄS MER

5. 4. Quaternized fluorene-based hydroxide exchange membranes and polymers: design, synthesis, and characterization

   Författare :Andrit Allushi; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; anion exchange membrane; hydroxide conductivity; alkaline stability; water electrolyzer; fuel cell;

   Sammanfattning : In modern society, the consumption of fossil fuels has been increasing drastically, leading to significant emissions of carbondioxide (CO2), air pollution, global warming, and political and economic imbalances. This has increased the interest inrenewable and sustainable energy sources such as wind- and hydropower, solar energy, and in energy conversion by fuel celltechnology, and water electrolyses. LÄS MER

7. 5. Polyhydroxyalkylations for alkali-stable cationic polymers as hydroxide exchange membranes

   Författare :Dong Pan; Centrum för analys och syntes; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; quaternary ammoniums; aromatic polymers; chemical resistance; ion conductivity;

   Sammanfattning : To alleviate worldwide dependence on fossil fuels for energy production and considerably reduce CO2 emissions, green energy sources and sustainable energy solutions are in high demand. Fuel cells are environmental-friendly electrochemical devices which may use clean fuels, e.g., green hydrogen gas, to generate electricity. LÄS MER