Comparative Electrochemical Study of Low Temperature Fluorinated Graphite Used as Cathode in Primary Lithium Batteries

In the present study we show the electrochemical performances of three series of fluorinated graphites CFx-MFn-T used as cathode materials in primary lithium batteries. Li/1M LiClO4 or LiBF4 PC /CFx were cells were discharged at different rates up to 1C. The electrochemical properties are correlated to physico-chemical characterizations. When the fluorine content increases, the capacity increases up to 900 Ah.kg-1. With increased covalency of the C-F bonding, the average discharge potential decreases from 3.15 to 2.31 V. The specific energy peaked at 2277 Wh.kg-1. Thermal storage was performed on cells and capacity losses upon ageing were found satisfactory