Cellulose composite vanadium oxide sol as well as preparation method and application thereof

The invention relates to cellulose composite vanadium oxide sol as well as a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing V2O5, water and hydrogen peroxide, standing and aging to obtain A glue; adding cellulose into water, uniformly dispersing, freezing and unfreezing to obtain glue B; adding the glue B into the glue A, and uniformly mixing to obtain cellulose composite vanadium oxide sol; in the cellulose composite vanadium oxide sol, the concentration of vanadium pentoxide is 0.025 to 0.05 mol/L; the cellulose accounts for 5.2%-52.3% of the total mass of the cellulose and the vanadium pentoxide. The cellulose and the vanadium oxide are compounded and uniformly mixed, the two phases stably coexist, and the prepared electrochromic material is high in cycling stability. 本发明涉及一种纤维素复合钒氧化物溶胶及其制备方法和应用，制备方法包括以下步骤：将V2O5、水和双氧水混合均匀，静置陈化得到A胶；将纤维素加入到水中分散均匀，经过冷冻后解冻，得到B胶；将B胶加入到A胶中混合均匀，得到纤维素复合钒氧化物溶胶；所述纤维素复合钒氧化物溶胶中，五氧化二钒的浓度为0.025～0.05mol/L；纤维素占纤维素和五氧化