Abstract
VO2/TiO2 nanosponges with easily tailored nanoarchitectures and composition were synthesized by electrostatic spray deposition as binder-free electrodes for supercapacitors. Benefiting from the unique interconnected pore network of the VO2/TiO2 electrodes and the synergistic effect of high-capacity VO2 and stable TiO2, the as-formed binder-free VO2/TiO2 electrode exhibits a high capacity of 86.2 mF cm−2 (~548 F g−1) and satisfactory cyclability with 84.3% retention after 1000 cycles. This work offers an effective and facile strategy for fabricating additive-free composites as high-performance electrodes for supercapacitors.
Highlights
VO2/TiO2 nanosponges with tailored nanoarchitectures and composition were synthesized by electrostatic spray deposition as binder-free electrodes for supercapacitors
To examine the surface electronic state and chemical composition, the products with different vanadium contents deposited on the glass slides followed by a certain heat treatment were characterized by X-ray photoelectron spectroscopy (XPS) (Fig. 1 and Fig. S1)
The high-resolution XPS spectrum for V2p3/2 can be deconvoluted into two peaks (Fig. 1c), where the peaks at 516.4 and 517.4 eV correspond to the reported binding energy for V4+ and V5+10,37
Summary
VO2/TiO2 nanosponges with tailored nanoarchitectures and composition were synthesized by electrostatic spray deposition as binder-free electrodes for supercapacitors. We fabricate binder-free VO2/TiO2 nanosponges by an ESD route and explore their electrochemical performance in SCs. The porous VO2/TiO2 film delivers a highest electrochemical capacitance of 86.2 mF cm−2 (~548 F g−1) between − 1 and − 0.3 V (vs SCE) at a scan rate of 10 mV s−1.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
