Graphene/Au composite paper as flexible current collector to improve electrochemical performances of CF_x cathode

We report the application of free-standing, lightweight, and flexible graphene/Au composite paper (GACP), as a current collector for CF_x cathode. At a high discharge current density of 4000 mA g^-1 (5C), the capacity of the CF_1.0 loaded on GACP current collector is 653 mAh g^-1, while CF_1.0 loaded on Al foil failed at 800 mA g ^-1 (1C). Using GACP, both excellent rate capability and specific capacity can be achieved simultaneously, owing to its undulant surface structure and flexible contact with the CF_x composite active layer. Our results provide a new strategy to design both high power and energy densities CF_x cathode.