Solubility of the NiO fuel-cell cathode in Li/sub 2/CO/sub 3/-K/sub 2/CO/sub 3/ melts as determined by cyclic voltametry
Technical Report
·
OSTI ID:6456182
Observations of metallic-nickel deposits in the electrolyte of molten-carbonate fuel cells (MCFC) have prompted investigation of lithiated NiO cathode solubility. Under the current trend toward pressurized operation of the fuel-cell athode, NiO is not likely to survive the 40,000 h of operation desired for commercial cells. Therefore, a major effort in MCFC development is to improve cathode stability, including a search for alternative materials. This paper focuses on the use of cyclic voltametry in molten salts to evaluate solubility of cathode materials. In this study, cyclic voltametry (CV) is used to quantify Ni/sup 2 +/ concentration arising from NiO solubility by NiO + CO/sub 2/ reversible Ni/sup 2 +/ + CO/sub 3//sup 2 -/ for the temperature range 823 to 1023/sup 0/K and also for electrolyte compositions deviating from the conventional 62 mol % Li/sub 2/CO/sub 3/ - 38 mol % K/sub 2/CO/sub 3/. Cyclic voltametry provides a responsive method for these analyses and holds promise for screening other materials.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6456182
- Report Number(s):
- CONF-830508-13; ON: DE83009460
- Country of Publication:
- United States
- Language:
- English
Similar Records
Solubility of the NiO fuel cell cathode in Li/sub 2/CO/sub 3/-K/sub 2/CO/sub 3/ melts as determined by cyclic voltammetry
Solubility of the NiO fuel-cell cathode in Li/sub 2/CO/sub 3/-K/sub 2/CO/sub 3/ melts as determined by cyclic voltammetry
Solubility of LiCoO{sub 2} in molten carbonates
Conference
·
Sun May 01 00:00:00 EDT 1983
· Proc. - Electrochem. Soc.; (United States)
·
OSTI ID:6145262
Solubility of the NiO fuel-cell cathode in Li/sub 2/CO/sub 3/-K/sub 2/CO/sub 3/ melts as determined by cyclic voltammetry
Conference
·
Fri Dec 31 23:00:00 EST 1982
·
OSTI ID:5928525
Solubility of LiCoO{sub 2} in molten carbonates
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:349011
Related Subjects
30 DIRECT ENERGY CONVERSION
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CATHODES
CHALCOGENIDES
DATA
DEPOSITS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
EXPERIMENTAL DATA
FUEL CELLS
HIGH-TEMPERATURE FUEL CELLS
INFORMATION
LITHIUM CARBONATES
LITHIUM COMPOUNDS
MOLTEN CARBONATE FUEL CELLS
NICKEL COMPOUNDS
NICKEL OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
SOLUBILITY
SOLVENT PROPERTIES
STABILITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VOLTAMETRY
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CATHODES
CHALCOGENIDES
DATA
DEPOSITS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
EXPERIMENTAL DATA
FUEL CELLS
HIGH-TEMPERATURE FUEL CELLS
INFORMATION
LITHIUM CARBONATES
LITHIUM COMPOUNDS
MOLTEN CARBONATE FUEL CELLS
NICKEL COMPOUNDS
NICKEL OXIDES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
SOLUBILITY
SOLVENT PROPERTIES
STABILITY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VOLTAMETRY