SEM/EDX and AA measurements of current-induced composition gradients in molten NaNO/sub 3/-AgNO/sub 3/
Scanning electron microscopy with energy dispersive x-ray fluorescence, and atomic absorption analysis, are applied to the chemical analysis of composition gradients in quenched binary mixtures of molten salts that have been electrolyzed between silver electrodes. The results demonstrate the merging of the diffusion layers from cathode and from anode, confirming the shapes of the composition profiles predicted from the ion flow analysis based on Faradaic, migrational and diffusional flows. Effective diffusion coefficients for the electrolyte contained in a porous matrix (Y/sub 2/O/sub 3/) are derived from the ratios of known electrolyte conductance and of measured conductance in the matrix. The methods are shown to be applicable to the analysis of composition gradients in molten salt battery electrolytes.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6093995
- Report Number(s):
- CONF-8010205-2; ON: DE82001472
- Country of Publication:
- United States
- Language:
- English
Similar Records
Current-induced composition gradients in molten AgNO/sub 3/-NaNO/sub 3/: a model system for the LiCl-KCL electrolyte of an Li/S battery
Physical chemistry of molten-salt batteries. Final report, 1 October 1980-September 1981. Current-induced composition gradients in molten LiCl-KCl
Related Subjects
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ABSORPTION SPECTROSCOPY
ALKALI METAL COMPOUNDS
BINARY MIXTURES
CHALCOGENIDES
CHEMICAL ANALYSIS
CURRENTS
DIFFUSION
DISPERSIONS
ELECTRIC BATTERIES
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ELECTROLYSIS
ELECTROLYTES
ELECTRON MICROSCOPY
LYSIS
MATERIALS
MATRIX MATERIALS
MICROSCOPY
MIXTURES
MOLTEN SALTS
NITRATES
NITROGEN COMPOUNDS
NONDESTRUCTIVE ANALYSIS
OXIDES
OXYGEN COMPOUNDS
POROSITY
QUANTITATIVE CHEMICAL ANALYSIS
SALTS
SCANNING ELECTRON MICROSCOPY
SILVER COMPOUNDS
SILVER NITRATES
SODIUM COMPOUNDS
SODIUM NITRATES
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
VOLTAGE DROP
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES