Changing the LiAl/FeS cell design to include excess FeS capacity

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6458691

Kaun, T D

State-of-the-art LiAl/FeS cells contain 20 to 35% excess LiAl capacity. This excess LiAl capacity was deemed necessary to provide stable cell capacity. Lithium-aluminum electrode utilizations of 65% or more of the theoretical capacity have not met cell capacity decline goals of < 0.02% per cycle. Recent improvements in the LiAl electrode, however, have resulted in higher utilization of 80% while maintaining a low capacity decline rate. These LiAl electrodes are fabricated by the slurry method, whereas conventional LiAl electrodes are cold-pressed. With the FeS electrode limiting the cell capacity, the cell power capability is thereby closely linked with FeS electrode characteristics. Cell diagnostic work indicates significant increases in cell resistances after 50% depth of discharge due to the FeS electrode. With the improved LiAl electrode, it became feasible to design the cell with excess FeS electrode capacity. This paper describes the performance characteristics of cells having the LiAl electrode capacity-limiting design. These cells (based on a low-resistance hardware design) exhibit 15% increased specific energy at 2 to 4 h discharge rates and 70% increased power at 80% depth of discharge.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6458691
• Report Number(s): CONF-830508-5; ON: DE83009458
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250901* -- Energy Storage-- Batteries-- Design &amp; Development
250903 -- Energy Storage-- Batteries-- Materials
Components
&amp; Auxiliaries
ALLOYS
ALUMINIUM ALLOYS
CAPACITY
CHALCOGENIDES
DESIGN
ELECTRIC BATTERIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRODES
ENERGY DENSITY
IRON COMPOUNDS
IRON SULFIDES
LITHIUM ALLOYS
LITHIUM-SULFUR BATTERIES
METAL-NONMETAL BATTERIES
PERFORMANCE
PHYSICAL PROPERTIES
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS