Synthesis and characterization of high-quality cobalt vanadate crystals and their applications in lithium-ion batteries

Abstract

High-quality cobalt vanadate crystals have been synthesized by solid-state reaction route. Structure and morphology of the synthesized powders were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR) spectroscopy. The XRD patterns revealed that the as prepared materials are of high crystallinity and high quality. The SEM images showed that the crystalline CoV₂O₆ material is very uniform and well separated, with particle (of) area ~25² μm. The electronic and optical properties were investigated by impedance analyzer and UV–visible spectrophotometer. Temperature-dependent electrical resistivity was measured using four-probe technique. The crystalline CoV₂O₆ material is a semiconductor and its activation energy is 0.05 eV.

Keywords:

• CoV₂O₆
• anode material
• Li-ion battery
• crystalline oxide
• electrical conductivity
• impedance spectroscopy

Public Interest Statement

In this work, high-quality cobalt vanadate crystals have been synthesized by solid-state reaction method. The cobalt vanadate crystals might be used as a potential anode material for lithium-ion rechargeable batteries. Lithium-ion rechargeable batteries are most important parts of the modern science and technology due to its usage as power sources in portable electronic devices. The efficiency of the lithium-ion batteries depends on the properties of anode and cathode materials. In this work, we tried to improve the efficiency of lithium-ion batteries by enhancing quality of anode materials.

Acknowledgments

Authors would like to thanks Rajshahi University, Rajshahi, Bangladesh authority for providing funds under the University Research Grant. Authors also would like to thanks Ministry of Science and Technology, Govt. of Bangladesh for providing scholarship to carry out this work.

Additional information

Notes on contributors

Md. Abdur Razzaque Sarker

The author and co-authors of this article are engaged in teaching and research in the recognized public universities in Bangladesh. They are working in a research topic related with synthesis and characterization of some functional oxide materials. The aim of this group is the synthesis of crystalline functional materials for various device applications such as rechargeable batteries, thermoelectric power generator, high-performance capacitors, and optical polarizer. This work is about the synthesis of good quality crystalline anode materials for rechargeable Li-ion batteries.