Evaluating Li/CFx Cell Components for Deep Space Space Exploration

Abstract

To meet the future demands of space exploration will require primary batteries offering higher specific energy, relative to heritage space rated cells based on Li/SO2, Li/SOCl2 and Li/MnO2 chemistries. Cells based on the Li/CFx chemistry are currently under development to support operations in challenging extreme environments. One such proposed application of advanced primary cells is for a proposed Europa Lander, which would analyze the icy surface of this Jovian moon, evaluate its potential for habitability, and investigate for signs of bio-signatures. To address this unique mission requires a detailed understanding of the effects of wide temperatures and radiation on cell electrical and thermal performance, self-discharge characteristics and reliability. In particular, results from screening of cell components will be reviewed, including electrodes and electrolytes experiencing high doses of ionizing radiation. The work described here was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA) and supported by the Europa Lander Pre-Project.