Abstract
Li/graphite fluoride (GFx) cells, with highest theoretical capacity in primary lithium batteries, high energy density, long shelf life, safety and a wide operating temperature, have been widely noticed during the past decades. However, the low electronic conductivity and discharge potential of Li/GFx cells obviously limited its applications. The key to improve the energy performance of Li/GFx cells is to increase the transportation ability of Li+ in cathode materials. Considering its high specific surface area, large bulk volume and layer spacing, Ketjenblack is used for preparing the cathode materials with highly stored energy. Based on gas-solid fluorination, we synthesized the fluorinated Ketjenblack (FKB). As the cathode materials of lithium batteries, electrochemical assay show that the lithium/FKB cells have a novel discharged voltage of 3V versus Li/Li+ electrode, and a special capacity near 800 mAh g-1. The lithium/FKB cells may be used for a new highly stored energy device.
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