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Ionic Conductivity

Measures the ability of ions to move through an electrolyte, a critical factor determining battery performance and internal resistance.
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The statement of the theorem

Define the ionic conductivity (κ\kappa) of an electrolyte solution as the reciprocal of the solution resistance (RionR_{ion}). Alternatively, κ\kappa is related to the concentration (CiC_i) and the ion mobility (μi\mu_i) of the constituent ions:\nκ=∑iziFCiμi\kappa = \sum_{i} z_i F C_i \mu_i