Improvement in the capacity and safety of lithium/inorganic electrolyte sulfur dioxide rechargeable cells. Phase 2. Final report, Sep 88-Nov 90
The authors objective was to develop a prototype rechargeable lithium/sulfur dioxide/carbon cell, using practical AA size hardware, in which the electrolyte was to be a sulfur dioxide solution of lithium bromide or thiocyanate, together with a highly soluble cosolute, a second non-lithium salt of the same anion. The cosolute was intended to replace the organic cosolvents familiar from the primary cells, and hopefully, to improve lithium plating efficiency and electrolyte stability during cycling. The primary discharge capacities for AA size cells containing 1.25M CsBr/ 0.12 M LiBr/ So2 were only about 400mAh, while secondary and subsequent capacities were less than 200 mAh. The rates of solvolysis of bromide and of thiocyanate were exacerbated apparently both by the high anion concentrations and by increased lithium ion concentration. They then studied lithium/ sulfur dioxide/ carbon rechargeable cells in which the electrolytes were mixtures of tetrachloroaluminate salts in sulfur dioxide, to take advantage of the better performance, but to face the problem of limited capacity. They determined that the capacity of lithium/ bromine soluble positive cells was being limited by the loss of electrical contact between the carbon and the positive electrode current collector. Also, lithium plating efficiency was poor.
- Research Organization:
- Battery Engineering, Inc., Hyde Park, MA (United States)
- OSTI ID:
- 5477330
- Report Number(s):
- AD-A-235303/5/XAB; CNN: DAAL01-88-C-0845
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LITHIUM-SULFUR BATTERIES
DESIGN
ANIONS
BATTERY CHARGING
CARBON
CESIUM BROMIDES
EFFICIENCY
ELECTRIC BATTERIES
ELECTRIC CONTACTS
ELECTROLYTES
ION DENSITY
LITHIUM
LITHIUM BROMIDES
LITHIUM COMPOUNDS
PERFORMANCE TESTING
PLATING
SOLVOLYSIS
STABILITY
SULFUR DIOXIDE
THIOCYANATES
ALKALI METAL COMPOUNDS
ALKALI METALS
ANTITHYROID DRUGS
BROMIDES
BROMINE COMPOUNDS
CARBONIC ACID DERIVATIVES
CESIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
DECOMPOSITION
DEPOSITION
DRUGS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELEMENTS
EQUIPMENT
HALIDES
HALOGEN COMPOUNDS
HORMONE ANTAGONISTS
IONS
LITHIUM HALIDES
METAL-NONMETAL BATTERIES
METALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE COATING
TESTING
250900* - Energy Storage- Batteries