Ultrafast Li+ diffusion kinetics enhanced by cross-stacked nanosheets loaded with Co3O4@NiO nanoparticles: Constructing superstructure to enhance Li-ion half/full batteries

Novel CoNi binary metal oxide superstructures assembled with cross-stacked nanosheets (Co3O4/NiO/ NC) have been successfully prepared by two-step thermal annealing process with CoNi-based and cyano-bridged coordination polymer (CoNiCP). Ascribing to the super decussate structure and as obtained three-dimensional carbon conductive network, the obtained material exhibited excellent lithium-ion storage capacity including superior cycling stability and rate performance through facilitating the easy electron/ion transport. For example, CoNi binary metal oxide superstructures exhibit an excellent rate capacity of 493 mA h g(-1) at 5.0 A g(-1) and a long-lifetime cycling performance of 1390 mA h g(-1) after 100 cycles at 0.2 A g(-1). This strategy may pave a way for designing and preparing binary metal oxide superstructures materials with excellent electrochemical performance for lithium ion battery by using coordination polymers as the sacrificial template (C) 2020 Elsevier Inc. All rights reserved.