Abstract: The invention relates to the development of quaterphenylene polymer derivatives with synthetic methodologies towards controllable and integer degree of functionalization on the quaterphenylene polymer backbone with specific number of side phenyl groups and monovalent hydrocarbon groups terminated by a functional group consisting of quaternary ammonium groups resulting to precise IEC, water uptake and anionic conductivity without batch-to-batch variations and compatible with industrial manufacturing processes for use as membranes or ionomers in low temperature and high temperature polymer electrolyte membrane fuel cells.

Abstract: The invention relates to the fabrication of membranes based on polyphenylene-based polymers—and more particularly, for example, quaternary ammonium functionalized polyphenylene-based polymers—utilizing a class of green sustainable organic solvents, such as cyclic ketones, by casting or coating for use in high temperature polymer electrolyte membrane fuel cells or water electrolyzers.

Abstract: Aromatic polymers exhibiting thermal stability and conductivity upon imbibement into an acid are disclosed for electrochemical gas sensor applications. Membrane electrode assemblies for electrochemical gas sensors are also provided, comprising a sensing electrode, a counter electrode, and a polymer membrane comprising the polymers of the present invention, disposed between the sensing electrode and the counter electrode.

Abstract: The present invention relates to a class of polymer ion imbibed membranes for electrolyte flow batteries. The membranes are a conducting aromatic polyether type copolymer bearing nitrogen heterocycles groups, especially pyridine type. While the membranes can be used in acid, basic, and neutral electrolytes, the nitrogen heterocycles in the membrane interact with acid in the electrolyte to form a proton transport network, so as to keep the proton transport performance of the membrane. The membrane has excellent mechanical stability and thermostability as well as tunable porosity.

Abstract: The present invention relates to a class of polymer ion imbibed membranes for electrolyte flow batteries. The membranes are a conducting aromatic polyether type copolymer bearing nitrogen heterocycles groups, especially pyridine type. While the membranes can be used in acid, basic, and neutral electrolytes, the nitrogen heterocycles in the membrane interact with acid in the electrolyte to form a proton transport network, so as to keep the proton transport performance of the membrane. The membrane has excellent mechanical stability and thermostability as well as tunable porosity.

Abstract: Aromatic polymers exhibiting thermal stability and conductivity upon imbibement into an acid are disclosed for electrochemical gas sensor applications. Membrane electrode assemblies for electrochemical gas sensors are also provided, comprising a sensing electrode, a counter electrode, and a polymer membrane comprising the polymers of the present invention, disposed between the sensing electrode and the counter electrode.

Abstract: New conjugated polymers based on 2,3-diphenylquinoxaline, dibenzo[a,c]phenazine, 2,3-diphenylpyrido[3,4-b]pyrazine, dibenzo[f,h]pyrido[3,4-b]quinoxaline, 2,3-diphenylpyrazino[2,3-d]pyridazine and dibenzo[f,h]pyridazino[4,5-b]quinoxaline along with their derivatives and thiophene, thieno[3,2-b]thiophene and thieno[2,3-b]thiophene along with their derivatives and a preparation method and uses thereof are disclosed.

Abstract: Facile ways towards the development of linear and brush-type zwitterionic conjugated polyelectrolytes possessing hole or electron blocking abilities are presented using combination of polymerization techniques, such as Suzuki or Stille cross coupling, Grignard Metathesis Polymerization and Atom transfer radical polymerization. These zwitterionic conjugated polyelectrolytes will serve as excellent interface materials in various optoelectronic devices.

Abstract: New polymeric networks bearing benzimidazole units have been prepared. These polymeric networks will combine high proton conductivity, superior mechanical properties and thermal and oxidative stability due to the existence of polar benzimidazole groups and the presence of the unique polymeric architecture. The prepared polymer networks can be used in the catalyst ink of the electrodes in high temperature PEM fuel cells.