Publications Repository - Gdańsk University of Technology

In this paper, V2O5 nanostructures with a size depending on the annealing temperature are successfully synthesized by a sol-gel method. The crystal structure and morphology of samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), selected area electron diffraction (SEAD) and scanning electron microscopy (SEM), respectively. Electrochemical testing such as discharge–charge cycling (CD) and cyclic voltammetry (CV) are employed in evaluating their electrochemical properties as cathode materials for lithium ion battery. One-dimensional nanostructures are successfully synthesized with the same structure, composition and similar shape. Results reveal that for one-dimensional nanostructures, next to the thickness which must be as small as possible, the length of nanocrystals is crucial and should be above 2 µm. The longer nanostructures obtained at 650 °C deliver a discharge specific capacity of 281 mAh g-1 at a current rate of C/5 which is over 95.5% of the theoretical capacity for two Li+ ions intercalation (294 mAh g-1) within a voltage window of 2.0-4.0 V.

Authors

• dr inż. Marta Prześniak-Welenc link open in new tab ,
• dr hab. inż. Jakub Karczewski link open in new tab ,
• dr inż. Smalc-koziorowska Julita,
• dr hab. inż. Marcin Stanisław Łapiński link open in new tab ,
• prof. dr hab. inż. Wojciech Sadowski link open in new tab ,
• prof. dr hab. inż. Barbara Kościelska link open in new tab