Design and synthesis of Janus-structured mutually doped SnO2–Co3O4hollow nanostructures as superior anode materials for lithium-ion batteries

Janus-structured materials are synthesized by spray pyrolysis and a subsequent oxidation process. The synergistic effect of mutual doping of hollow SnO₂nanoplates and Co₃O₄polyhedra, and nanocatalysts of metallic Co resulted in excellent electrochemical performances of the Janus-structured SnO₂–Co₃O₄composite.