emf studies of lithium-rich lithium--aluminum alloys for high-energy secondary batteries
Emf measurements were made across the lithium-rich half of the lithium--aluminum system at temperatures from 390/sup 0/ to 550/sup 0/ by use of a cell of the type Li/LiCl--KCl (or LiF--LiCl--LiBr)/Li--Al. The lithium activity increases from 0.007 to approximately 0.7 over the composition range of 48 to 56 atomic percent (a/o) lithium (the ..beta..-phase region). A compound, Li/sub 3/Al/sub 2/, rather than Li/sub 2/Al, as reported in standard compilations, exists at temperatures up to the peritectic decomposition at 520/sup 0/C, and forms a two-phase region of high lithium activity (greater than 0.85) with the lithium-rich liquid phase. This compound has an estimated free energy of formation of -58 kJ/mole at 700/sup 0/K. The emf data indicate that the lithium-rich liquidus is about 2 a/o richer in lithium than the composition shown in standard compilations of binary phase diagrams. 6 figures, 1 table.
- Research Organization:
- Argonne National Lab., IL
- OSTI ID:
- 5225839
- Journal Information:
- J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 124:8; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
ALKALI METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
ANODES
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
DIAGRAMS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROMOTIVE FORCE
ENERGY
ENERGY STORAGE SYSTEMS
FORMATION FREE ENERGY
FREE ENERGY
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
IRON COMPOUNDS
IRON SULFIDES
LITHIUM ALLOYS
LITHIUM BASE ALLOYS
LITHIUM CHLORIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
LITHIUM-CHLORINE BATTERIES
LITHIUM-SULFUR BATTERIES
METAL-GAS BATTERIES
METAL-NONMETAL BATTERIES
PHASE DIAGRAMS
PHASE STUDIES
PHYSICAL PROPERTIES
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS