Soft chemical in situ synthesis, formation mechanism and electrochemical performances of 1D bead-like AgVO3 nanoarchitectures

Abstract

The soft chemical process is a useful and unique method for the preparation and design of one-dimensional (1D) nanoarchitectures. 1D bead-like AgVO₃ nanoarchitectures are prepared via a soft chemical in situ reaction using the layered structure K₂V₆O₁₆·2.7H₂O platelike particles as the precursor. The formation mechanism is investigated through tracing the evolution of the structure and morphology of intermediate products during the reaction, and it consists of two processes. One is the in situ reaction of the Ag⁺ ions with the V₃O₈ layers of K₂V₆O₁₆. The other is the fragmentation of the 2D platelike composite into a 1D fiber composite. Moreover, the electrochemical investigation shows that after 50 cycles at a current density of 100 mA g⁻¹, the 1D bead-like nanostructure cathode exhibits a higher discharge capacity (127 mA h g⁻¹) than that of 1D nanowires (75 mA h g⁻¹), mainly due to the larger specific surface area and fine particles-constructed architecture.