Ionic‐Liquid‐Assisted Synthesis of Self‐Assembled TiO2‐B Nanosheets under Microwave Irradiation and Their Enhanced Lithium Storage Properties

Self‐assembled TiO2‐B nanosheets have been successfully synthesized by a rapid, one‐pot, ionic‐liquid‐assisted solvothermal route under microwave irritation. By adjusting the reaction temperature, reaction time, and reactant concentration, the morphology and phase of the as‐formed TiO2‐B nanostructures can be tailored. The unique role of the ionic liquid in the formation of self‐assembled TiO2 nanosheets has been investigated in detail, and a plausible growth mechanism has been proposed. Owing to the synergetic superiority of hierarchical porosity, a fast pseudocapacitive reaction, and large surface area, the electrode prepared from the self‐assembled porous TiO2‐B nanostructures exhibits high reversible capacity, excellent cyclability, and superior rate capability. The synthetic procedure is simple, efficient, and scalable for mass production. Therefore the as‐formed self‐assembled TiO2‐B nanosheets may offer great potential for next‐generation rechargeable batteries with high‐power densities, and are flexible building blocks for advanced functional devices.