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Electrochemistry

Supercapacitor Performance Calculator

GCD-based capacitance, energy and power densities.

Csp = IΔt / (mΔV); E = CspΔV² / 7.2; P = 3600E / Δt

Inputs

Results

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Assumptions & limitations

  • Ideal constant-current, approximately linear GCD discharge. Use the discharge voltage window after the initial iR drop; do not include that drop in ΔV or Δt.
  • Mass basis is the mass you enter, with no factor-of-four correction. For device energy/power, use two-electrode full-cell data and total active mass of both electrodes. Three-electrode electrode data is not a device-level energy estimate. Nonlinear/pseudocapacitive discharge requires integrating I∫Vdt; packaging and inactive mass are excluded.