Tailored Synthesis of Coral-Like CoTiO3/Co3O4/TiO2 Nanobelts with Superior Lithium Storage Capability

A facile yet efficient two-step electrospinning calcination strategy is smartly developed to construct 1D hierarchical coral-like CoTiO3/Co3O4/TiO2 hybrid nanobelts. The 1D coral-like nanohybrid is homogeneously constructed from well-dispersed CoTiO3 nanobelts and uniformly distributed secondary crystalline Co3O4/TiO2 nanoparticle building blocks. When evaluated as anodes for lithium-ion batteries (LIBs), the hybrid CoTiO3/Co3O4/TiO2 nanobelt electrode exhibits a promising reversible capacity of 722.3 mAh g(-1) at 100 mA g(-1) after 250 cycles and has excellent cyclability with a capacity of 256.7 mAh g(-1) after 1000 cycles at a current density of 2000 mA g(-1). The imitating 1D coral-like structural pattern is beneficial to alleviate the nanoparticle agglomeration and increase the contact area with the electrolyte, leading to the short diffusion path and facilitating the rapid transfer of lithium ions. The high-level secondary nanobuilding blocks offer a large specific surface area, high surface-to-bulk ratio, and fast interfacial ion transport. Herein, it strongly sheds light on the elegant design concept of the hybrid for fabricating next-generation advanced rechargeable LIBs.