A MOF-derived multifunctional nano-porous fluorinated carbon for high performance lithium/fluorinated carbon primary batteries

For lithium/fluorinated carbon batteries, the carbon sources play a key role in improving the cell performances. In this work, we developed a new type of fluorinated carbon using Cr-MOF as precursor via a direct F2 fluorination method. The prepared samples not only keep the morphology of Cr-MOF but also contain plenty of in-situ fabricated nano-voids during the process of fluorination. Benefitting from the advantage of the nano-porous structure, the samples fluorinated at different temperatures show the highest energy density of 2110.7 W‧h kg−1 at a current density of 10 mA g−1 and a maximum power density of 6540 W kg−1 at 3000 mA g−1. Moreover, the MOF-derived fluorinated carbon cathodes possess an anti-swelling function (volume expansion is no more than 12%). This work delivers a new approach for designing advanced multifunctional fluorinated carbons.