Multi-dimensionally ordered, multi-functionally integrated r-GO@TiO2(B)@Mn3O4 yolk–membrane–shell superstructures for ultrafast lithium storage

TiO 2 (B) is an attractive new anode candidate for lithium-ion batteries (LIBs) due to its unique and highly desirable properties, including high structural integrity, long cycle life, and low cost. However, despite these merits, its inherent slow lithium and electron transport kinetics hinder its practical application to LIBs. Here, we propose a novel, simple route towards multi-dimensionally ordered, multi-functionally integrated reduced graphene oxide (r-GO)@TiO 2 (B)@Mn 3 O 4 yolk–membrane–shell superstructures in which r-GO nanosheets, TiO 2 (B) nanosheets, and Mn 3 O 4 nanoparticles are hierarchically organized to achieve remarkable synergistic interactions. This hybridization design is fundamentally bilateral in nature, aiming to overcome the conductivity and capacity deficiencies of TiO 2 (B) simultaneously. The resulting r-GO@TiO 2 (B)@Mn 3 O 4 yolk–membrane–shell superstructures have great potential as advanced anode materials for ultrafast lithium storage, delivering a strikingly high reversible capacity of 662 mA·h·g −1 at 500 mA·g −1 after 500 charge–discharge cycles.