Abstract
A graphite fluoride (CF(LT)-T) series with singular physicochemical properties were prepared by a refluorination treatment between 100 and 600°C of a low-temperature (LT) fluorinated graphite. The most striking feature ofthese materials is the coexistence of sp 2 - and the sp 3 -type hybridizations of the carbon atoms, which gives the materials an unusual hybrid covalent/ semicovalent character. This hybrid structure leads to outstanding electrochemical performances as cathode materials in primary lithium batteries. In particular a very high energy density of 2277 Wh kg - 1 was achieved with the CF(LT)550 material. The discharge voltage and capacity are refluorination temperature dependent.
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