Edge-oriented SnS₂ nanosheet arrays on carbon paper as advanced binder-free anodes for Li-ion and Na-ion batteries

Two-dimensional SnS₂ materials are promising for energy storage, but the specific capacity and cycling performance are still far from satisfactory. Herein, a rational design of edge-oriented SnS₂ nanosheet arrays with vertical alignment on a carbon paper for Li-ion and Na-ion batteries is reported. The unique hybrid architecture provides sufficient electrode/electrolyte interaction areas, fast electron/ion transport and efficient volume accommodation, thereby enabling high and stable electrochemical utilization as well as fast reaction kinetics of SnS₂. The as-prepared SnS₂@C hybrid paper, when used as a binder-free anode for both Li-ion and Na-ion batteries, exhibits high specific capacity, superior rate capability and excellent cycling durability. The outstanding electrochemical performance suggests that the SnS₂ nanosheet arrays with preferential edge orientation hold great potential serving as advanced anode materials for the use in energy storage applications.