Rechargable molten-electrolyte lithium batteries: A status report

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:5455210

Kaun, T D

Lithium-alloy/metal sulfide cells with on molten-halide electrolytes, which are operated in a temperature range of 375-474{degree}C, have undergone many improvements in recent years. Cycle life now exceeds 1000 cycles. The Li-alloy/LiCl-LiBr-KBr eutectic (25:37:38 mol%)/upper-plateau (U.P). FeS{sub 2} cell operated at 400{degree}C has shown excellence performance prospects: 200 Wh/kg specific energy and 200-W/kg specific power. Electrolyte composition has played a dominant role in attaining long-term stable electrochemical performance. A modified LiCl-LiBr-KBr composition (34:32.5:33.5 mol%) was found to exhibit 25% increased ionic conductivity over that of the eutectic. This higher-conductivity electrolyte approximately compensates for the reduced electrolyte content of the electrolyte-starved FeS{sub 2} cell. Such a cell has attained of 95% utilization of U.P. FeS{sub 2} electrode capacity at a comparable cell impedance (0.8-1.0 ohm -cm{sup 2}) to that of an the electrolyte-flooded cell. Advancements in cell design and materials application have reduced materials costs and increased battery durability. Both FeS and FeS{sub 2} cell tests have demonstrated overcharge tolerance (3-5 mA/cm{sup 2}) for electrolyte-starved operation with MgO powder separators. 12 refs., 7 figs.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5455210
• Report Number(s): CONF-8910107-4; ON: DE90003774
• Resource Relation: Conference: Electrochemical Society fall meeting, Hollywood, FL (USA), 15-20 Oct 1989
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
LITHIUM-SULFUR BATTERIES
RESEARCH PROGRAMS
COST
DESIGN
ELECTROLYTES
HALIDES
HIGH TEMPERATURE
LITHIUM ALLOYS
LITHIUM COMPOUNDS
LITHIUM IONS
MOLTEN SALTS
PERFORMANCE TESTING
RECHARGE
SERVICE LIFE
ALKALI METAL COMPOUNDS
ALLOYS
CHARGED PARTICLES
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
HALOGEN COMPOUNDS
IONS
METAL-NONMETAL BATTERIES
SALTS
TESTING
250900* - Energy Storage- Batteries