Building 3D Structures of Vanadium Pentoxide Nanosheets and Application as Electrodes in Supercapacitors

Citations Over TimeTop 1% of 2013 papers

Abstract

Various two-dimensional (2D) materials have recently attracted great attention owing to their unique properties and wide application potential in electronics, catalysis, energy storage, and conversion. However, large-scale production of ultrathin sheets and functional nanosheets remains a scientific and engineering challenge. Here we demonstrate an efficient approach for large-scale production of V2O5 nanosheets having a thickness of 4 nm and utilization as building blocks for constructing 3D architectures via a freeze-drying process. The resulting highly flexible V2O5 structures possess a surface area of 133 m(2) g(-1), ultrathin walls, and multilevel pores. Such unique features are favorable for providing easy access of the electrolyte to the structure when they are used as a supercapacitor electrode, and they also provide a large electroactive surface that advantageous in energy storage applications. As a consequence, a high specific capacitance of 451 F g(-1) is achieved in a neutral aqueous Na2SO4 electrolyte as the 3D architectures are utilized for energy storage. Remarkably, the capacitance retention after 4000 cycles is more than 90%, and the energy density is up to 107 W·h·kg(-1) at a high power density of 9.4 kW kg(-1).

Related Papers

• → Optical properties and electronic structure of V2O5, V2O3 and VO2(2020)109 cited
• → Kinetic studies of laser-induced synthesis of thin vanadium pentoxide films(1986)8 cited
• → The Vanadium Pentoxide Catalyst.I-II. I. The Reduction of Vanadium Pentoxide by a Static Method.(1961)4 cited
• Explorative Experiment in Extracting Pulverized Vanadium Pentoxide in Vanadium-Bearing Steinkohle,Zhunyi County,Guizhou Province(2006)
• → Vanadium Pentoxide Catalysts. III-V. III. The Reduction of Spherical Vanadium Pentoxide(1961)