Investigation of the dissolution of CaCrO/sub 4/ in molten LiCl-KCl eutectic
The rate of dissolution of CaCrO/sub 4/ in molten LiCl-KCl eutectic was measured by laser Raman spectroscopy after attempts at direct sampling of the melt and cyclic voltammetry proved unsuccessful. Increasing the calcining temperature of the CaCrO/sub 4/ prepared by General Electric Co., Neutron Devices Dept. (GENDD), for use in Ca/CaCrO/sub 4//Fe thermal batteries resulted in an increase in the average particle size, with a concomitant reduction in the rate of dissolution in the molten eutectic. CaCrO/sub 4/ obtained from a commercial supplier was found to contain a component that was resistant to dissolution in the molten eutectic; this resistance caused the commercial product to be less reactive than the GENDD-prepared CaCrO/sub 4/ in Ca/CaCrO/sub 4//Fe thermal batteries. Catholyte mixes formulated with characterized CaCrO/sub 4/ samples were tested in batteries under various load conditions. The performance of batteries containing the finely divided GENDD CaCrO/sub 4/ was inferior under light-load conditions to that of batteries with coarser material. The poor performance was the result of enhanced dissolution kinetics of the finer CaCrO/sub 4/, which caused greater generation of heat from chemical reactions at the anode.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6929951
- Report Number(s):
- SAND-83-2272; ON: DE84016394
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
CHROMATES
CHROMIUM COMPOUNDS
DISSOLUTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
EUTECTICS
HALIDES
HALOGEN COMPOUNDS
LITHIUM CHLORIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
MOLTEN SALTS
OXYGEN COMPOUNDS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
SALTS
THERMAL BATTERIES
TRANSITION ELEMENT COMPOUNDS
VOLTAMETRY