
Dataset of the article with title: Synergistic effects of surface chemistry and porosity in vanadium redox reactions: from smooth thin films to high surface area carbon electrodes.
This work is a part of the project Model electrodes for redox flow devices, supported by the IRC GOIPD/2021/530.

DOI of the article: [Insert DOI once available]

Description:

The present dataset is composed of 4 different methods used for the measurements, characterizations, simulations, and analyses of our article:

1.Electrochemistry:
This dataset describes the electrochemical response of carbon thin films and carbon cloth electrodes toward the vanadyl/pervanadyl  redox couple. Two types of measurements are included:
- Cyclic voltammetry (CV) and linear sweep voltammetry (LSV): Data related to Figures 2C-D, Figures 3A-C, and Figure 6C for carbon thin films, and Figures 5A-C for carbon cloth electrodes. Each file contains two columns: potential (V) and current density (mA cm-2).
- Vanadium redox flow battery (VRFB) tests: Data related to Figures 7A-F for carbon cloth electrodes. The files include electrochemical impedance spectroscopy (EIS) measurements with two columns: Real resistance (Ω) and Imaginary resistance (Ω). Charge-discharge cycles are also provided with corresponding Coulombic, Voltage, and Energy efficiencies.

2. Scanning Electron Microscopy (SEM):
This dataset contains SEM images related to Figures 6A-B, with insets showing the water contact angles of both thin films and carbon cloth electrodes. The images were obtained using a Zeiss Ultra microscope with an accelerating voltage of 5.00 kV and an In-Lens detector.

3.Simulations:
This dataset contains simulated and experimental voltammograms related to Figures 4A-C. It includes simulations of an E-step with k0 values ranging from 10-8 to 10-3 cm s-1, best fits of simulated (dotted lines) and experimental (solid lines) anodic waves for VO2+ oxidation, and SSE figures of merit as a function of k0. These data correspond to voltametric simulations and experimental fits used to evaluate electron-transfer kinetics, where the minima in the SSE curves indicate the best-fit values of k0

4.X-ray Photoelectron Spectroscopy (XPS):
This dataset describes the elemental composition and distributions of carbon, oxygen, and nitrogen for survey and high-resolution measurements of carbon-based electrodes (anC-Spy and anC-Rpy), related to Figures 2A-F. The files are composed of two columns: Intensity (CPS) and Binding Energy (eV). High-resolution spectra of carbon and nitrogen are included to show the main component distributions. The data were analysed using CasaXPS software.

