Browsing NTNU Open by Author "Kongstein, Ole Edvard"

Now showing items 1-13 of 13

    • Bipolar Plates for PEM Systems 

      Lædre, Sigrid (Doctoral thesis at NTNU;2016:247, Doctoral thesis, 2016)
      Summary of thesis: The Bipolar Plate (BPP) is an important component in both Proton Exchange Membrane Fuel Cells (PEMFCs) and Proton Exchange Membrane Water Electrolyzers (PEMWEs). Bipolar plate material and processing ...

    • Carbon-polymer composite coatings for PEM fuel cell bipolar plates 

      Husby, Hans; Kongstein, Ole Edvard; Ødegård, Anders; Seland, Frode (Journal article; Peer reviewed, 2014)
      A carbon-polymer composite coating on stainless steel 316L substrates was investigated for the use as bipolar plate material for polymer electrolyte membrane fuel cells. The coating consisted of 45 vol% graphite, 5 vol% ...

    • Coating for Metal Bipolar Plates in PEM Water Electrolysers 

      Krakhella, Kjersti Sandvik (Master thesis, 2015)
      To increase the efficiency of hydrogen as an energy storage medium, this project's goal is to lower the cost of Proton Exchange Membrane Water Electrolysers (PEMWE) by decreasing the cost of the most expensive component: ...

    • Conductive Coatings for Metal Bipolar Plates in Proton Exchange Membrane Water Electrolyzers 

      Olaussen, Tina (Master thesis, 2016)
      Due to the use of expensive materials, only 4 % of hydrogen production today is from water electrolysis. The most efficient low-temperature electrolyzer is the proton exchange membrane electrolyzer (PEMWE), where the bipolar ...

    • Crystal Orientation of Iron Produced by Electrodeoxidation of Hematite Particles 

      Tokushige, Manabu; Kongstein, Ole Edvard; Haarberg, Geir Martin (Journal article, 2013)
      Electrowinning of iron was conducted in a 50 wt% NaOH-H2O electrolyte with suspended Fe2O3 particles at 110ºC and pure α-Fe films were obtained on a disk cathode with a higher current efficiency than 95%. The Fe2O3 particle ...

    • Electrode behaviors of Na-Zn liquid metal battery 

      Xu, Junli; Martinez, Ana Maria Cuellar; Osen, Karen Sende; Kjos, Ole Sigmund; Kongstein, Ole Edvard; Haarberg, Geir Martin (Journal article; Peer reviewed, 2017)
      The electroreduction processes on a Mo electrode in a Na-Zn liquid metal battery cell with a molten NaCl-CaCl2-ZnCl2 electrolyte were investigated at 565°C. The effect of the battery operating parameters on the loss rate ...

    • Electroplating of Stainless Steel in Aqueous Alkaline Solution 

      Thu, Ida Soland (Master thesis, 2017)
      Electroplated stainless steel alloys containing elements such as iron, chromium and nickel, are of great interest in production of electronics and nanotechnology devices. Previous methods for electroplating of these alloys ...

    • Investigation of metallic bipolar plates for PEM fuel cells 

      Lædre, Sigrid (Master thesis, 2011)
      High cost and a short lifetime are the two main reasons why the PEM fuel cell is yet to be commercialized. The bipolar plate in a PEM fuel cell is alone responsible for about 45% of the cost and 85% of the total weight of ...

    • Materials for Proton Exchange Membrane water electrolyzer bipolar plates 

      Lædre, Sigrid; Kongstein, Ole Edvard; Ødegård, Anders; Karoliussen, Håvard; Seland, Frode (Journal article; Peer reviewed, 2017)
      Titanium based BiPolar Plates (BPPs) are commonly used in Proton Exchange Membrane Water Electrolyzers (PEMWEs) today as they can withstand the harsh operating conditions experienced inside an operating PEM water electrolyzer. ...

    • Measuring In Situ Interfacial Contact Resistance in a Proton Exchange Membrane Fuel Cell 

      Lædre, Sigrid; Kongstein, Ole Edvard; Ødegård, Anders; Seland, Frode; Karoliussen, Håvard (Journal article; Peer reviewed, 2019)
      Interfacial contact resistance (ICR) is one of the remaining hurdles for successful implementation of stainless steel bipolar plates in PEM fuel cells. We have developed a reliable method, using thin gold wires, to measure ...

    • Production of Iron Alloy by Direct Electrolytic Reduction Using Suspension Electrolysis in an Alkaline Electrolyte 

      Tokushige, Manabu; Kongstein, Ole Edvard; Haarberg, Geir Martin (Peer reviewed; Journal article, 2022)
      Iron alloys were produced by suspension electrolysis in a 50 wt% NaOH–H2O electrolyte at 383 K, and Fe–Cr and Fe–Ni alloys were obtained using a suspension of Fe2O3+Cr2O3 and Fe2O3+Ni(OH)2 particles, respectively. Highly ...

    • Soldering a gas diffusion layer to a stainless steel bipolar plate using metallic tin 

      McCay, Katie; Kongstein, Ole Edvard; Ødegård, Anders; Barnett, Alejandro; Seland, Frode (Journal article; Peer reviewed, 2018)
      A novel investigation to decrease the interfacial contact resistance of stainless steel bipolar plates was performed. A thin layer of Sn was electrodeposited onto a bipolar plate and subsequently joined with a gas diffusion ...

    • Ta-ITO Coated Titanium Bipolar Plates for Proton Exchange Membrane Water Electrolyzers 

      Lædre, Sigrid; Mendizabal, Lucia; Kongstein, Ole Edvard; Ødegård, Anders; Karoliussen, Håvard; Seland, Frode (Peer reviewed; Journal article, 2022)
      A novel bi-layer coating composed of a tantalum base layer with an Indium Tin Oxide (ITO) top layer was applied to titanium substrates. Samples were polarized ex situ in a parameter study, where the pH, potential and ...