Feature Request: Model for Li-Cu (Lithium on Copper) Half-Cell #5265
Description
Description
Hello PyBaMM Team,
I would like to request a new feature: a dedicated model for a Li-Cu (Lithium-Copper) half-cell.
The Li-Cu half-cell configuration is one of the most fundamental and widely used experimental setups for studying lithium metal anodes (LMAs). It is the standard method for:
- Evaluating Coulombic Efficiency (CE) of Li plating/stripping.
- Studying the formation and properties of the Solid Electrolyte Interphase (SEI) on an inert substrate.
- Analyzing plating/stripping behavior using Cyclic Voltammetry (CV).
- Performing Electrochemical Impedance Spectroscopy (EIS) to probe the interface.
Current Limitations:
Currently, PyBaMM does not seem to have a model that directly captures the physics of this system.
- DFN/SPM:These models assume intercalation electrodes (like graphite), which is not correct for this system.
- lithium_metal.Full:This model simulates a Li|Li symmetric cell. While it correctly handles the Butler-Volmer kinetics for plating/stripping, it assumes two active lithium metal electrodes, each with an initial thickness.
Desired Model Features:
- A "negative electrode" that acts as an inert current collector (Copper).
- A "positive electrode" (counter electrode) of Lithium metal.
- The primary state variable on the copper side would be the thickness (or molar amount) of plated lithium, which starts at 0.
- Standard Butler-Volmer kinetics on the Cu surface.
- (Challenge) A way to handle the open-circuit potential (OCP) of the Cu electrode before any lithium is plated, as it is undefined or "floating."
Thank you for your consideration! I would like to help!
Motivation
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Possible Implementation
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Additional context
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