Designing stable capacity for LiAl/FeS multiplate cells
High-temperature (450 to 475/sup 0/C) LiAl/FeS cells for an electric-vehicle battery are being developed at Argonne National Laboratory in cooperation with industrial contract partners. The battery cell design of the first development battery, Mark IA, contained three positive electrodes of FeS with Cu/sub 2/S additive and four LiAl (46 at. % Li) electrodes in LiCl-KCl eutectic electrolyte. The plurality of electrodes enabled greater cell capacity per unit of cell hardware weight (compared to earlier bicells). A specific energy of 100 W-h/kg was obtained at a C/4 h discharge rate. These cells, with 3.2 mm thick positive electrodes and 17.5 x 17.5 cm electrode dimensions, have also provided high (80 to 95%) active material utilization. The cycle-life testing of these high utilization cells unfortunately exhibited appreciable capacity decline rates, particularly during the initial 50 to 100 cycles. For the Mark IA design, a 0.27% decline in capacity per cycle was typical. The MK IA cells contained a negative to positive electrode capacity ratio of 1.0, while a developmental design (the D build) had a ratio of 1.1. The D build cells' capacity decline rate was generally lower - 0.15% decline per cycle. Cycle-life tests were performed, and results are presented and discussed. (WHK)
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6513113
- Report Number(s):
- CONF-8010159-10; ON: DE81023707
- Resource Relation:
- Conference: Fall meeting of the Electrochemical Society, Hollywood, FL, USA, 5 Oct 1980
- Country of Publication:
- United States
- Language:
- English
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33 ADVANCED PROPULSION SYSTEMS
ELECTRIC-POWERED VEHICLES
LITHIUM-SULFUR BATTERIES
PERFORMANCE TESTING
CAPACITY
ELECTRODES
SERVICE LIFE
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
METAL-NONMETAL BATTERIES
TESTING
VEHICLES
250902* - Energy Storage- Batteries- Performance & Testing
330300 - Advanced Propulsion Systems- Electric-Powered Systems