Coupled flower-like Bi2S3 and graphene aerogels for superior sodium storage performance

A hierarchically structured Bi2S3/graphene aerogel composite is constructed that shows excellent sodium storage properties. Specifically, the composite delivers a stable reversible capacity of 397 mA h g−1 at 100 mA g−1 after 50 cycles and 348 mA h g−1 at 1 A g−1 after 120 cycles. Furthermore, even at a high current density of 2 A g−1, a reversible capacity of 336 mA h g−1 is achieved.