Development of LiV3O8 through Solid State Route and Investigating the Effect of Different Synthesis Temperatures, Molybdenum Dopant Concentrations and Lithium Content on LiV3O8 as a Cathode Material for LIBs Application /

Abstract

In pursuit of rapid energy transition, the quest of sustainable energy systems have approached the research and development of rechargeable battery technology as a plausible solution. LIBs are at the acme of current market when it comes to renewable energy storage technology. Compounds such as LiV3O8 featuring low cost and high energy densities have been studied for more than 20 years. LiV3O8 cathode though having high capacity and energy density, suffers from degradation in electrochemical performance on cycling. The electrochemical properties of LiV3O8 depends on the form factor, therefore investigation of synthesis method and careful tailoring of the synthesis steps can yield desired electrochemical properties. Following different synthesis routes including both hydrothermal and solid state, several researchers have pointed out the emergence of additional phases such as V2O5 alongside the main LiV3O8 phase. In the present research work the investigation of the effect of different synthesis tmeperatures i.e. 400⁰C, 450⁰C, 500⁰C and 550⁰C, effect of different Molybdinum dopant concentrations (1.05:2.85:0.15, 1.05:2.75:0.25, 1.05:2.65:0.35, 1.05:2.55:0.45) and Lithium precursor concentrations of 15 wt. %, 25 wt. %, 35 wt. % and 45 wt. % is applied to cater the aforementioned problem. Synthesis process is carried out through a solid state route. Inaddition the effect of excess Lithium precursor content on phase and structure of LiV3O8 and V2O5 is investigated. While Characterization techniques XRD, FTIR and SEM were used to explore the resultant material for its application as a cathode material for Lithium ion battery application. For molybdenum doping it was observed that as dopant concentration was increased the XRD of LiV3O8 revealed changes in the intensity of characteristic peak at around 14⁰. Furthermore, the results proposes the temperature of 450⁰C and excess 45wt.% Lithium precursor content as the optimum temperature and concentration for synthesis of LiV3O8 through solid state method.