A polymer cage as an efficient polysulfide reservoir for lithium-sulfur batteries.

Herein, we present a self-assembly strategy to prepare a cage-polymer coated sulfur sample. The sample embeds graphene as a new sulfur cathode. The cathode exhibits excellent electrochemical stability, maintaining a capacity of 546 mA h g-1 after 495 cycles at 1C, corresponding to an attenuation rate of 0.071% per cycle.