Browsing Research Publications/Outputs by Author "Vaivars, G"

Now showing items 1-11 of 11

Anion exchange membrane based on alkali doped poly(2,5-benzimidazole) for alkaline membrane fuel cell

Author: Luo, H ; Vaivars, G ; Nonjola, S ; Rohwer, Mark B ; Mathe, Mahlanyane K Date: Mar 2010 Alkaline membrane fuel cell (AMFC) has been received increasing attention among the different types of fuel cells. Ammonium quaternized polymers such as poly (arylene ether sulfones) are being developed and studied as candidates of ionomeric ... Read more
Anion exchange membrane based on alkali doped poly(2,5-benzimidazole) for fuel cell

Author: Luo, H ; Vaivars, G ; Agboola, B ; Mu, s ; Mathe, Mahlanyane K Date: Feb 2012 The properties of alkali doped poly(2,5-benzimidazole) membrane with different alkali doping level for fuel cell application is reported in this work. The alkali doping level played an important role for the ion conductivity of the membrane. ... Read more
Covalent-ionically cross-linked polyetheretherketone proton exchange membrane for direct methanol fuel cell

Author: Luo, H ; Vaivars, G ; Mathe, Mahlanyane K Date: Aug 2010 In this paper, the proton exchange membrane prepared by covalent-ionically crosslinking water soluble sulfonated-sulfinated poly(oxa-p-phenylene-3,3-phthalido-pphenylene- oxa-p-phenylene-oxy-phenylene) (SsPEEK-WC) is reported. Compared with ... Read more
Covalently cross-linked polyetheretherketone proton exchange membrane for DMFC

Author: Luo, H ; Vaivars, G ; Modibedi, Remegia M ; Mathe, Mahlanyane K Date: May 2009 The proton exchange membrane was prepared by covalent cross-linking sulfonated-sulfinated polyetheretherketone. The cross-linked membrane showed high proton conductivity (0.04 S/cm) with suitable water uptake, low methanol permeability (2.21 ... Read more
Cross-lined PEEK proton exchange membranes for fuel cell - Conference Poster

Author: Luo, H ; Vaivars, G ; Modibedi, Remegia M ; Mathe, Mahlanyane K Date: Jul 2009 The low-cost cross-linked Polyetheretherketone (PEEK) proton exchange membranes were prepared via the simple route. The membranes exhibited similar electrochemical properties as compared with commercial Nafion. The membranes were highly proton ... Read more
Cross-linked PEEK-WC proton exchange membrane for fuel cell

Author: Lou, H ; Vaivars, G ; Mathe, Mahlanyane K Date: Oct 2009 The low cost proton exchange membrane was prepared by cross-linking water soluble sulfonated-sulfinated poly(oxa-p-phenylene-3,3-phthalido-p-phenylene-oxa-p-phenylene-oxyphenylene) (SsPEEK-WC). The prepared cross-linked membrane became insoluble ... Read more
Double cross-linked polyetheretherketone proton exchange membrane for fuel cell

Author: Luo, H ; Vaivars, G ; Mathe, Mahlanyane K Date: Apr 2012 The proton exchange membrane based on polyetheretherketone was prepared via two steps of cross-linking. The properties of the double cross-linked membrane (water uptake, proton conductivity, methanol permeability and thermal stability) have ... Read more
Imade-imide cross-linked PEEK proton exchange membrane.

Author: Luo, H ; Vaivars, G ; Mathe, Mahlanyane K ; Zheng, Haitao Date: Aug 2009 The proton exchange membrane is a key component of polymer electrolyte membrane fuel cell (PEMFC). It plays an important role, conducts protons and separates the fuel from oxidant in PEMFC. DuPont’s Nafion is a perfluorinated sulfonic acid ... Read more
Innovative membrane development for fuel cells

Author: Vaivars, G ; Luo, H Date: Oct 2011 The innovative membranes for alternative energy devices will be presented. An electrical car is long waited solution to environmental and fuel supply problems in transport. Most probably, the shift from a combustion engine to an electrical ... Read more
Synthesis and characterization of functional peek for ion-exchange membranes

Author: Luo, H ; Vaivars, G ; Mathe, Mahlanyane K Date: Mar 2010 The sulfonated and sulfinated polyetheretherketone (SsPEEK) was prepared via a novel method. SsPEEK has two types of functional groups, the functional groups for ion-exchange and the functional groups for further strengthening of the ion-exchange ... Read more
Technological aspects in synthesis and characterization of proton conducting polyetheretherketone (PEEK) membranes for fuel cell applications.

Author: Vaivars, G ; Kleperis, J ; Chikvaidze, G ; Luo, H ; Mathe, Mahlanyane K Date: Aug 2009 The research on ion-exchange membranes has grown considerably in recent years with the growing interest in fuel cell technology for the automotive and portable applications. The requirements for a fuel cell membrane are the following: high ... Read more

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Browsing Research Publications/Outputs by Author "Vaivars, G"

Browsing Research Publications/Outputs by Author "Vaivars, G"

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All of ResearchSpace

This Community

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