▎ 摘　　要

NOVELTY - Synthesizing lithium vanadate on graphene oxide (GO) includes (a) preparing GO by a modified Hummer's method, (b) preparing the ethylene glycol (EG)-water solvent system by mixing EG: water in 2:1 (volume/volume) ratio, (c) dispersing 5 wt.% GO in EG: water solvent (10 ml) taken in a beaker and sonicated for 45 minutes, (d) adding stoichiometric quantity of 0.9094 g vanadium oxide and 15 ml EG: water solvent with stirring, (e) dissolving stoichiometric amount of 1.2588 g lithium hydroxide monohydrate in 15 ml of EG: water completely with the help of a glass rod and transferring the solution into the beaker containing GO and vanadium oxide suspension, (f) heating the resultant solution at 55 degrees C for 30 minutes with constant stirring, and (g) transferring the greyish color solution obtained after 30 minutes into a Teflon (RTM: PTFE) lined autoclave (50 ml capacity) and subjecting it to hydrothermal treatment at 140-170( plus minus ) degrees C for 3-5 hours. USE - The method is useful for synthesizing lithium vanadate on graphene oxide. ADVANTAGE - The method: is a template free modified solvothermal method and no post calcination is required for template removal; gives rise to in-situ growth of crystalline, nut-shaped (with nut sizes sub-micrometer to 2 mu m) hierarchical mesoporous lithium vanadate on GO making intimate contacts of lithium vanadate particles with GO ensuing enhanced electrical conductivity of lithium vanadate-GO; utilizes mesoporous channels present in lithium vanadate-GO that helps in faster lithium-ion diffusion and the lower wall thicknesses due to mesoporous microstructure reduces the diffusion distances and enhances ionic conductivity; and is simple, short and cheaper template free one-pot synthetic route. DETAILED DESCRIPTION - Synthesizing lithium vanadate on graphene oxide (GO) includes (a) preparing GO by a modified Hummer's method, (b) preparing the ethylene glycol (EG)-water solvent system by mixing EG: water in 2:1 (volume/volume) ratio, (c) dispersing 5 wt.% GO in EG: water solvent (10 ml) taken in a beaker and sonicated for 45 minutes, (d) adding stoichiometric quantity of 0.9094 g vanadium oxide and 15 ml EG: water solvent with stirring, (e) dissolving stoichiometric amount of 1.2588 g lithium hydroxide monohydrate in 15 ml of EG: water completely with the help of a glass rod and transferring the solution into the beaker containing GO and vanadium oxide suspension, (f) heating the resultant solution at 55 degrees C for 30 minutes with constant stirring, (g) transferring the greyish color solution obtained after 30 minutes into a Teflon (RTM: PTFE) lined autoclave (50 ml capacity) and subjecting it to hydrothermal treatment at 140-170( plus minus ) degrees C for 3-5 hours, (h) filtering and washing greyish powder obtained after hydrothermal treatment with ethanol 5-6 times, and (i) after washing, drying the product in an air oven at 80 degrees C overnight.