Patents by Inventor Jiujun Zhang

Jiujun Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ionomer impregnation of electrode substrates for improved fuel cell performance
    Patent number: 6187467
    Abstract: Liquid feed fuel cell performance can be increased by impregnating electrode substrates with a proton conducting ionomer prior to incorporation of the electrocatalyst, and optionally also after application of the electrocatalyst. Ionomer impregnation is particularly effective for direct methanol fuel cell anodes that comprise carbonaceous substrates.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: February 13, 2001
    Assignee: Ballard Power Systems Inc.
    Inventors: Jiujun Zhang, Kevin M. Colbow, David P. Wilkinson
  • Electrode treatment method for improving performance in liquid feed fuel cells
    Patent number: 6153323
    Abstract: Fuel cell performance in liquid feed fuel cells with an electrode comprising a carbonaceous substrate and an electrocatalyst can be increased by oxidizing the carbon substrate, particularly by electrochemical methods in acidic aqueous solution, prior to incorporation of the electrocatalyst. The treated substrate may thereafter be advantageously impregnated with a proton conducting ionomer to prevent excessive penetration of the applied catalyst into the substrate. The treatment method is particularly effective for direct methanol fuel cell anodes.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: November 28, 2000
    Assignee: Ballard Power Systems Inc.
    Inventors: Kevin M. Colbow, Jiujun Zhang, David P. Wilkinson