Abstract
Pulse ionized titania 3D-nanonetworks (T3DN) are emerging materials for fabricating binder-free and carbon-free electrodes for electrochemical energy storage devices. In this article, we investigate the effect of the one of the most important fabrication parameters, pulse frequency, for optimizing supercapacitor efficiency. A series of coin cell batteries with laser-induced electrodes was fabricated; the effect of pulse frequency on oxidation levels and material properties was studied using both experimental and theoretical analysis. Also, detailed electrochemical tests including cyclic voltammetry (CV), charge/discharge, and electrochemical impedance spectroscopy (EIS) were conducted to better understand the effect of pulse frequency on the electrochemical performance of the fabricated devices. The results show that at a frequency of 600 kHz, more T3DN were observed due to the higher temperature and stabler formation of the plasma plume, which resulted in better performance of the fabricated supercapacitors; specific capacitances of samples fabricated at 600 kHz and 1200 kHz were calculated to be 59.85 and 54.39 mF/g at 500 mV/s, respectively.
Highlights
In our recent work [23], we proposed a new approach via pulse ionization for single step and chemical-free fabrication of titania 3D nanonetworks (T3DN) with significantly increased surface area and improved electrochemical properties
The results presented in this work can lead to promising solutions for using laser pulses for the fabrication of better nanostructured titania with predetermined electrochemical properties, which can address our needs in different energy storage (EES) applications
At the frequency of 600 kHz the temperature of the fabrication process is higher, which results in generation of a thicker layer of titania 3D-nanonetworks (T3DN) with higher porosity on electrode sheets
Summary
Both LIBs and supercapacitors have attracted a lot of attention in plug-in/hybrid electric vehicles for their high energy density (kWh kg−1 ) and power density (kW kg−1 ). Due to its low electrical conductivity and ion diffusivity in LIBs, TiO2 can limit the storage capacity in EES [10,11,12,13]
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.
