A novel one-pot synthesis strategy for -Mn₂V₂O₇ nanorods synthesized via 1-(3,6-dioxa heptane) 3-methyl imidazolium methane sulfonate-assisted hydrothermal route for sustainable and on-demand advanced supercapacitor electrodes and as negative electrode materials for Li-ion batteries

Advancements in anode materials greatly affect battery energy density and cycle life, and ongoing research and development in this area is critical to further improving lithium-ion battery (LIBs) technology. Metal vanadate nanomaterials (NMs) can be used for energy storage devices due to their high specific surface area and excellent electrochemical properties. Additionally, they have the potential to address the current limitations of LIBs, such as their low energy density and limited lifespan, making them a viable option for next-generation energy storage solutions. Herein, monoclinic beta-manganese vanadium oxide (IL-beta-Mn2V2O7) nanorods were first synthesized by an ionic liquid, 1-(3, 6-Dioxa Heptane) 3-Methyl Imidazolium Methane Sulfonate [DOMIMS] assisted low temperature hydrothermal synthesis method. beta-Mn2V2O7 were synthesized in the absence of DOMIMS by a bare hydrothermal method. The electric properties of beta-Mn2V2O7 and IL-beta-Mn2V2O7 were compared. Various characterization techniques, including XRD, FTIR, SEM, and TEM analysis, were used to characterize the prepared materials, and all confirmed the formation of beta-Mn2V2O7. The high conductivity of the IL-beta-Mn2V2O7 was attributed to the distinctive conductivity property of the ionic liquid imparted to the material during hydrothermal synthesis, as demonstrated by electrochemical characterization such as PEIS. The study examines the use of IL-beta-Mn2V2O7 nanorods for the construction of energy storage devices such as supercapacitors and as anode material components to enhance LIBs performance. The IL beta-Mn2V2O7 based supercapacitor system was found to be stable up to the highest scan rate, 10,000 mVs(-1) and has improved electrochemical energy storage properties, with a highest specific capacitance of 191 F/g. The highest discharge capacity of 756 mAh/g was observed at 0.1C rate. A stable capacity of 525 mAh/g at 0.1C and a capacity of 441 mAh/g at 0.2C and 264 mAh/g at 0.5C were observed. With a reversible capacity of 253 mAh/g, IL beta-Mn2V2O7 continues to perform stable and admirably with 20.05 % capacity loss even after 100 cycles at a 1C current rate. Therefore, with improved cycling stability, IL beta-Mn2V2O7 can be used as a potential competitor for the role of anode material in LIBs.