Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Sealing Li-alloy/FeS sub x cells for a bipolar battery

Conference ·
OSTI ID:5218225
Progress in cell design and materials development has led to the initial tests of sealed Li-alloy/metal sulfide cells for a bipolar battery configuration. Earlier efforts attempted to contain the molten electrolyte by a compressed peripheral gasket. Our innovative design approach is to build the cell around a hermetic peripheral seal. This seal consists of metal components bonded to an insulating ceramic ring (e.g., MgO). Prototypic seals maintained secure bonds and showed little apparent reactivity in compatibility tests conducted for more than 1000 h at 450{degree}C in melts with high lithium or sulfur activity. Single sealed FeS bipolar cells were operated for 1000 h and 100 cycles. Efforts are now being concentrated on the Li-alloy/FeS{sub 2} bipolar cell with molybdenum positive electrode current collector. Seal compositions that have a good matching of thermal expansion coefficient with molybdenum were developed. Over a dozen seals consisting of steel/ceramic/molybdenum have been fabricated based on a 3-cm-dia, bipolar cell design. The bipolar battery is expected to double specific power and increase specific energy by 30% over the monopolar battery configuration for {gt}500 W/kg and 200 Wh/kg in an electric-vehicle application. 4 refs., 3 figs., 3 tabs.
Research Organization:
Argonne National Lab., IL (USA)
Sponsoring Organization:
DOE/CE
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5218225
Report Number(s):
CONF-8910107-8; ON: DE90004887
Country of Publication:
United States
Language:
English