Heteroatom-enhanced dual-ion storage of a thiophene-based bipyridine polymer for high-capacity and high-rate lithium-ion batteries

A heteroatom sulfur- and nitrogen- embeded polymer, 2,2′-bithiophene-linked bipyridine, was prepared via in situ electropolymerization, achieving a compromise between low 'dead mass' and high activity with high energy density.