화학공학소재연구정보센터
Chemical Engineering Journal, Vol.350, 902-910, 2018
Harnessing the synergic lithium storage and morphology evolution of 1D bundle-like NiCo2O4@TiO2 hybrid to prolong the cycling life for lithium ion batteries
The 1D bundle-like NiCo2O4@TiO2 hybrid was synthesized by a general and effective microemulsion strategy. It is found that after cycles the primitive 1D shape has been translated into broccoli-like fashion accompanied with abundant pores, enough active sites and convenient diffusion path, which endows the hybrid with high lithium storage capability and excellent cyclability. As anodes for LIBs, a reversible discharge capacity of 749.74 mA h g(-1) is achieved after 800 long-term cycles at a current density of 2000 mA g(-1) compared to 447.35 mAh g(-1) of pure NiCo2O4. The hybrid also delivers superior rate performance such as 561.09 mAh g(-1) even at a large current density of 5000 mA g(-1). Specifically, when the current density gradually returns to 2000 mA g(-1), the capacity still recovers to 696.69 mAh g(-1).