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==== Purpose and Advantages of Half-Cell Measurements ==== | ==== Purpose and Advantages of Half-Cell Measurements ==== | ||
Half-cell configurations allow the measurement of the open-circuit potential (OCP) of a single electrode without interference from the counter electrode. This is particularly important for model development, where accurate OCP–stoichiometry relationships are needed for each electrode independently. | Half-cell configurations allow the measurement of the open-circuit potential (OCP) of a single electrode without interference from the counter electrode. This is particularly important for model development, where accurate OCP–stoichiometry relationships are needed for each electrode independently. Full-cell measurements only provide access to the combined potential difference between two electrodes. This makes it mathematically impossible to resolve individual OCP curves without assumptions or external references—a limitation known as the "observability problem." Half-cell testing avoids this issue by providing direct access to the electrode under study. | ||
Full-cell measurements only provide access to the combined potential difference between two electrodes. This makes it mathematically impossible to resolve individual OCP curves without | |||
This methodology supports model calibration, validation of new materials, and analysis of degradation mechanisms, and is applicable across a wide range of chemistries and formats. | This methodology supports model calibration, validation of new materials, and analysis of degradation mechanisms, and is applicable across a wide range of chemistries and formats. |