Reduced graphene oxide with 3D Interconnected Hollow Channel Architecture as High-Performance Anode for Li/Na/K-ion Batteries

Abstract Graphene is considered as one of the most promising anode materials for alkali (Li, Na and K) ion batteries in term of large specific surface area and high conductivity, whereas, low initial Coulombic efficiency, poor capacity and fast capacity decay severely block the commercialization process. Here, we designed reduced graphene oxide with three-dimensional interconnected hollow channel architecture (3D IH-rGO) via electrospinning/electrospray and carbonization techniques. Benefiting from the unique 3D interconnected hollow channel architecture, 3D IH-rGO anode exhibits extraordinary lithium storage ability with high initial Coulombic efficiency (74.0%), outstanding reversible capability (1216.0 mAh g−1 over 500 cycles at 0.5 A g−1) as well as superior cycle stability (capacity retention of 100% over 1000 cycles). Furthermore, 3D IH-rGO anode maintains good reversible capacities of 249.5 mAh g−1 and 215.7 mAh g−1 at 0.2 A g−1 after 100 cycles in sodium/potassium-ion batteries, respectively. These results manifest that 3D IH-rGO has giant potential in the field of Li/Na/K-ion batteries anodes.