A π-conjugated dual-functional redox mediator facilitates the construction of dendrite-free lithium–oxygen batteries

We present a π-conjugated TBMPSiBr as a dual-functional redox mediator, which can concurrently dissolve Br − /Br 3 − and in situ produce an organic–inorganic hybrid SEI on the lithium anode to construct dendrite free and long cycle life Li–O 2 batteries.