This tool analyzes polarization data specifically for H2/O2 fuel cells. Upload your experimental data column file to automatically calculate the Tafel slope, charge transfer coefficient (α), and exchange current density (i₀) based on the high overpotential approximation.
Governing Equations:
\(\eta = a + b \log i\)
\(a = 2.303 \frac{R_u T}{\alpha F} \log i_o \hspace{2cm} b = -2.303 \frac{R_u T}{\alpha F}\)
*Note: \(\eta\) is the activation overpotential calculated as \(\eta = E_{eq} – V_{cell}\)
(where \(E_{eq}\) is set to 1.23 V for H₂/O₂ fuel cells). \(i\) represents the current density.
Upload Data File:
Default Data Active
Column 1 Content:
Current/Density Unit:
Electrode Area (cm²):
Temperature (K):
Fitting Start Index:
Fitting End Index:
Analysis Results
| Tafel Slope (b): | – V/dec |
| Intercept (a): | – V |
| Charge Transfer Coeff. (α): | – |
| Exchange Current Density (i₀): | – A/cm² |