Al-Doped Ammonium Vanadium Oxide: A Potential Cathode Material for Sodium-Ion Batteries
摘要
Sodium-ion batteries (NIBs) are the other most popular electrochemical storage technology after lithium-ion systems because of their low price and abundant availability across the globe. Vanadium oxide is widely utilized as a cathode due to its distinctive layered structure and the ease with which cations may be inserted into and extracted from its framework. NH4V4O10 (NVO) has a sizeable inter-planar gap and a high diffusion rate for sodium ions. We investigated this electrode as a suitable NIB cathode due to its easy fabrication and morphological investigation. A direct hydrothermal technique was used to make layered structured ammonium vanadium oxide (NVO). Here, we improved the efficiency of NVO by doping aluminium hydroxide at different mole ratios of V:Al = 10:1, 20:1, 30:1, 40:1 and 50:1 by a simple hydrothermal technique. The characterization of the prepared NVO materials was performed using X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR). Based on morphological tests, elemental analysis and electrochemical performances of samples made at varying molar concentrations, the as-prepared Al-NVO samples appeared promising as a possible high-performance cathode for SIB systems.