Ultrathin V2O5 nanosheet, and preparation method and application thereof

The invention relates to an ultrathin V2O5 nanosheet and a preparation method thereof. The preparation method comprises the following steps: 1) weighing V2O5 powdered crystals, adding the V2O5 powdered crystals into a hydrogen peroxide solution and stirring; 2) continuously stirring and aging at room temperature to obtain V2O5 gel; 3) placing the V2O5 gel into a hopper and cleaning by using ethanol; 4) placing the V2O5 gel into an ethanol solution and soaking to obtain a colloidal precursor; 5) transferring the colloidal precursor into a reaction kettle, adding ethanol, heating and reacting, taking out a product from the reaction kettle and naturally cooling to room temperature; 6) centrifugally separating the product, washing with an absolute ethanol to obtain a product and drying the product in a drying box; and 7) heating the product in a muffle furnace, preserving heat, naturally cooling to room temperature and taking out the product to obtain the ultrathin V2O5 nanosheet. The invention has the benefits that when serving as an anode active material of a lithium ion battery, the ultrathin V2O5 nanosheet has the characteristics of excellent cycling stability and high magnification, and is a potential application material of a high-power long-life lithium ion battery.