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Title: Methods of conditioning direct methanol fuel cells

Abstract

Methods for conditioning the membrane electrode assembly of a direct methanol fuel cell ("DMFC") are disclosed. In a first method, an electrical current of polarity opposite to that used in a functioning direct methanol fuel cell is passed through the anode surface of the membrane electrode assembly. In a second method, methanol is supplied to an anode surface of the membrane electrode assembly, allowed to cross over the polymer electrolyte membrane of the membrane electrode assembly to a cathode surface of the membrane electrode assembly, and an electrical current of polarity opposite to that in a functioning direct methanol fuel cell is drawn through the membrane electrode assembly, wherein methanol is oxidized at the cathode surface of the membrane electrode assembly while the catalyst on the anode surface is reduced. Surface oxides on the direct methanol fuel cell anode catalyst of the membrane electrode assembly are thereby reduced.

Inventors:
 [1];  [2];  [3]
  1. (Newington, CT)
  2. (Menands, NY)
  3. (Niskayuna, NY)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1007906
Patent Number(s):
6,962,760
Application Number:
10/460,452
Assignee:
The Regents of the University of California (Los Alamos, NM) ALO
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Rice, Cynthia, Ren, Xiaoming, and Gottesfeld, Shimshon. Methods of conditioning direct methanol fuel cells. United States: N. p., 2005. Web.
Rice, Cynthia, Ren, Xiaoming, & Gottesfeld, Shimshon. Methods of conditioning direct methanol fuel cells. United States.
Rice, Cynthia, Ren, Xiaoming, and Gottesfeld, Shimshon. Tue . "Methods of conditioning direct methanol fuel cells". United States. doi:. https://www.osti.gov/servlets/purl/1007906.
@article{osti_1007906,
title = {Methods of conditioning direct methanol fuel cells},
author = {Rice, Cynthia and Ren, Xiaoming and Gottesfeld, Shimshon},
abstractNote = {Methods for conditioning the membrane electrode assembly of a direct methanol fuel cell ("DMFC") are disclosed. In a first method, an electrical current of polarity opposite to that used in a functioning direct methanol fuel cell is passed through the anode surface of the membrane electrode assembly. In a second method, methanol is supplied to an anode surface of the membrane electrode assembly, allowed to cross over the polymer electrolyte membrane of the membrane electrode assembly to a cathode surface of the membrane electrode assembly, and an electrical current of polarity opposite to that in a functioning direct methanol fuel cell is drawn through the membrane electrode assembly, wherein methanol is oxidized at the cathode surface of the membrane electrode assembly while the catalyst on the anode surface is reduced. Surface oxides on the direct methanol fuel cell anode catalyst of the membrane electrode assembly are thereby reduced.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 08 00:00:00 EST 2005},
month = {Tue Nov 08 00:00:00 EST 2005}
}

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