Coupled flower-like BiS and graphene aerogels for superior sodium storage performance.

A hierarchically structured BiS/graphene aerogel composite is constructed that shows excellent sodium storage properties. Specifically, the composite delivers a stable reversible capacity of 397 mA h g at 100 mA g after 50 cycles and 348 mA h g at 1 A g after 120 cycles. Furthermore, even at a high current density of 2 A g, a reversible capacity of 336 mA h g is achieved.