.FCSys.Species.'H+'.Ionomer.Fixed

Information

Assumptions:

1. The generalized resistivities (η, θ) are fixed (e.g., independent of thermodynamic state).
2. The electrochemical reaction rate is governed by the electrons. Therefore, the specific exchange current is zero (τ′ = 0) for protons.
3. The conductivity is mapped to the mobility of the protons by assuming that the mobility of the substrate (e.g., C19HF37O5S-) is zero.

The default electrical conductivity (σ = 8.3*U.S/U.m) is for DuPont^TM Nafion® N-112 [DuPontN112]. This is for the interaction between H⁺ and the solid; it does not include the additional voltage loss due to electro-osmotic drag (with H₂O).

The default thermal resistivity (θ = U.m*U.K/(0.1661*U.W)) is of H gas (rather than H⁺) at 300 K from [Schetz1996, p. 139]. Table 1 lists the properties at other temperatures.

For more information, please see the Species model.