Error when running DFN half-cell without a lithium plating parameter set

[brosaplanella]

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• PyBaMM version - $ python -m pip show pybamm: 21.9
• Python version - $ python --version: any

Describe the bug At the moment, if you try to use the PyBaMM half-cell model with a parameter set that doesn't include lithium plating (like the default one) it throws a rather non-informative error:

KeyError: KeyError("'Typical plated lithium concentration [mol.m-3]' not found. Best matches are ['Typical electrolyte concentration [mol.m-3]', 'Bulk solvent concentration [mol.m-3]', 'Lithium interstitial reference concentration [mol.m-3]']")

It would be good if the error was more informative.

This was identified by @sklein-ise in #1717.

[valentinsulzer]

Because of where this is in the code this is quite hard tbh without just putting in that one special case. What did you have in mind?

[brosaplanella]

Nothing in particular. Then, it might be easier to include the plating to the default parameters so, at least, if people run the default model, won't get the error.

[valentinsulzer]

Yeah we should definitely do that

[brosaplanella]

Then this would be a very good first issue. @sklein-ise let us know if you want to give it a go as well.

[valentinsulzer]

Default parameter set for a half-cell model is now "Xu2019"

[chenzhao-py]

Hello,

Could you please revisit to this issue? what should we do for half cell when we have customized parameter sets?

[valentinsulzer]

Either copy any missing parameters from Xu2019 or use very high values so that the overpotential from the lithium metal anode is zero

{
        "Negative electrode OCP [V]": 0.0,
        "Negative electrode conductivity [S.m-1]": 1e7,
        "Typical plated lithium concentration [mol.m-3]": 76900.0,
        "Exchange-current density for plating [A.m-2]": 1000,
        "Negative electrode thickness [m]": 1e-5,
    }