N-Doped Carbon Materials – Making Use of Eggshell Membranes


Nitrogen – rich carbon materials are useful for applications such as supercapacitors, battery electrodes, oxygen reduction reaction supports for polymer electrolyte membrane (PEM) fuel cells and directed methanol fuel cells, and as sorbents for CO2 capture. Unfortunately these materials are generally expensive to manufacture due to the intense chemical treatments needed to make the surface of the material rich in nitrogen.                        Image 1

University of Alberta inventors have developed a method using high nitrogen content egg shell membranes to create carbon materials suitable for the electrical energy storage systems.  The Nitrogen-doped carbon materials are characterized with mesopores or micropores with partial activation which help give favourable characteristics of electrical performance. The carbon material may be functionalized by addition of elemental materials, alloys, oxides, nitrides, sulfides, hydrides, or hydroxides, which can allow for rapid and reversible bulk redox reactions for electrochemical devices.



  • Nanostructured material manufactured from biomass proteins that are otherwise agricultural waste
  • Conditions of manufacture are less severe than current chemical treatments which result in dollar savings
  • Carbon material has desirable high N-content and high specific surface areas which lend to high reversible capacity for carbon based electrochemical capacitor electrode

Protection Status

Issued Patent US 9,916,914

Product Number


Contact Information

Monica Varga
Technology Management Group
TEC Edmonton – University of Alberta
Phone: 780-492-5744
​Email: monica.varga@tecedmonton.com