Sandwiched C@SnO₂@C hollow nanostructures as an ultralong-lifespan high-rate anode material for lithium-ion and sodium-ion batteries

Abstract

Novel interconnected sandwiched carbon-coated hollow nanostructures, <italic>i.e.</italic>, carbon–shell/SnO₂–nanocrystal–layer/hollow–carbon–core, were developed as SIB anode materials.