A new design of a free-standing electrode has been developed. Major features of this composite imply a conducting polymer network as well as the integration of recycled carbon fibers, a challenge overcome for the first time in the formulation of a positive electrode. The result is a one-of-a-kind electrode exhibiting a total electrode capacity of 141 mAh/g and an energy density of 468 Wh/kg. This is possible in part, because the recycled carbon fibers ensure sufficient mechanical stability and conductivity to allow for removal of « dead-weight » metallic current collector used in commercial batteries. This new formulation opens the way for the valorization of carbon fibers waste in the energy storage sector by providing greener Li-ion batteries with improved performance.
