Selection and evaluation of materials for advanced water electrolyzers
The mechanism of dissolution of ruthenium anodes and of the time variation of overpotential on such electrodes have been elucidated using combined electrochemical-ellipsometric studies. Attempts are being made to stabilize ruthenium based electrocatalysts for SPE water electrolyzers by investigation of mixed oxides with the requisite characteristics for highly efficient oxygen electrodes. The following materials have been identified as the most attractive for advanced alkaline water electrolyzers operating at 120 to 150/sup 0/C: Anode Electrocatalyst--High Surface Area Nickel Cobalt Oxide; Cathode Electrocatalyst--High Surface Area Nickel Boride; Separator--Teflon Bonded Potassium Titanate or Nafion; and Cell Frame--Teflon or Teflon Based. The tests on barrier materials, electrodes and cell components have so far been carried out on a static basis in a pressure vessel. Teledyne Energy Systems (TES) has designed and fabricated an advanced alkaline water electrolysis test rig (5-cell stack). In a joint BNl--TES--University of Virginia program, the most promising materials will be tested for performance and/or life in this test-rig.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 6535975
- Report Number(s):
- BNL-25211; CONF-781142-1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
080101* -- Hydrogen-- Production-- Electrolysis
ANODES
BORIDES
BORON COMPOUNDS
CATALYSTS
CATHODES
CHALCOGENIDES
COBALT COMPOUNDS
COBALT OXIDES
DISSOLUTION
ELECTROCATALYSTS
ELECTRODES
ELECTROLYTIC CELLS
ELEMENTS
EVALUATION
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HIGH TEMPERATURE
MATERIALS
MEDIUM TEMPERATURE
METALS
NICKEL BORIDES
NICKEL COMPOUNDS
NICKEL OXIDES
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
PLATINUM METALS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
REFRACTORY METALS
RUTHENIUM
TEFLON
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS