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

Abstract

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.

Structural Control of Nanofibers According to Electrospinning Process Conditions and Their Applications

“…Here, the reversible reaction of the lithium-ion with NiO and Co 3 O 4 (conversion-type capacity), the pore of the tubular structure, and the surface of reduced graphene oxide (adsorption-type capacity) all contribute to the specific capacity. Another interesting case is Liu et al's fabrication of lithium-ion batteries anode from one-dimension hierarchical coral-like CoTiO 3 /Co 3 O 4 /TiO 2 hybrid nanobelts via a two-step electrospinning calcination strategy (Figure 20b) [194]. This electrode material offers a combination of advantages from metal components (CoTiO 3 (enhancing cyclic stability), Co 3 O 4 (high theoretical specific capacity), and TiO 2 (improvement of structural stability)), and all advantages are reflected in the electrochemical performance (capacity of 722.3 mAh•g −1 at 100 mA•g −1 after 250 cycles).…”

“…The electrospinning technique can be seen to have played a significant role in enriching the structural morphology and improving the electrochemical performance of lithium-ion batteries. The unique coral-like CoTiO3/Co3O4/TiO2 hybrid nanobelts structures anode benefits the lithium ions transformation and provides excellent support for the specific capacity [194]. Copyright 2019, Wiley.…”

“…Copyright 2020, American Chemical Society. (b) The unique coral-like CoTiO 3 /Co 3 O 4 /TiO 2 hybrid nanobelts structures anode benefits the lithium ions transformation and provides excellent support for the specific capacity[194]. Copyright 2019, Wiley.…”