Structural and electrochemical properties of mesoporous FeVO₄ as a negative electrode for lithium-ion battery

The approach to accomplishing long cycle solidity usually depends on the electrode materials in lithium-ion batteries (LIBs). Herein, mesoporous FeVO₄ (MFVO) nanostructures (NSs) were prepared via a simple hydrothermal method and post-calcination using different concentrations of ethylenediaminetetraacetic acid (EDTA) chelating agent. The morphology, microstructure, and mesoporous nature of the as-prepared samples were characterized by scanning electron microscope, transmission electron microscope, and Brunauer-Emmett-Teller analyses, respectively. The as-obtained MFVO NSs were examined as a negative material for LIBs. The enhanced MFVO-2 (0.2 g of EDTA) electrode provides an initial charge/discharge capacity of 2880 mA h g⁻¹/2707 mA h g⁻¹ at 0.1 A g⁻¹. Even after 100 cycles, it displays a superior specific discharge capacity of 906 mA h g⁻¹. Furthermore, the MFVO-2 electrode exhibits a high-rate performance with a steady reversible capacity. As a result, the porosity and density of nanorod-like morphologies are significant factors in their electrochemical performances. The outstanding electrochemical effects of MFVO NSs may be suggested as a prospective anode material for enhanced LIBs.