Scope This record contains galvanostatic intermittent titration technique (GITT) steps measured during electrochemical impedance spectra (EIS) on the NMC cathode of a commercial LG CHEM INR18650-MJ1 lithium-ion cell. The measurements were conducted at 25°C and are provided in a structured Parquet format, suitable for data analysis workflows and model fitting. Files Filename Description Format Usage 18650-LG-3500-MJ1-cathode-GITT-EIS-Ch.parquet Structured GITT-EIS spectrum of NMC cathode during charge at 25°C. application/parquet Use in data science pipelines or impedance modeling. 18650-LG-3500-MJ1-cathode-GITT-EIS-Dc.parquet Structured GITT-EIS spectrum of NMC cathode during discharge at 25°C. application/parquet Use in data science pipelines or impedance modeling. RDF Metadata Filename Description Format Usage ro-crate-metadata.json RDF metadata describing the data table schema, test, and battery application/json+ld Semantic Web integration ro-crate-preview.html RDF metadata describing the data table schema, test, and battery application/json+ld Semantic Web integration Related Resources Relationship Name Description isPartOf INR18650-LG-3500-MJ1 Cathode Structured Data Collection This collection contains records with structured data files representing GITT measurements on the positive electrode (cathode) harvested from an INR18650-MJ1 Li-ion battery cell. The active material in the electrode is NMC. The measurment is obtained in three-electrode configuration with the working electrode NMC, counter electrode composite graphite/silicon oxide, and reference electrode lithium metal in a coin cell casing. The records include raw data obtained from GITT and EIS measurements. The data is intended to be used to charactrize the open-circuit potential and lithium diffusion coefficient in the NMC material to support model-based analysis of MJ1 cells. Continues INR18650-LG-3500-MJ1 Cathode GITT+EIS Raw Data This record contains the measurement results from a galvanostatic intermittent titration technique (GITT) test at 25°C of an INR18650-MJ1 lithium-ion battery cell manufactured by LG CHEM. The raw data is provided in both HDF5 and CSV formats. Continues INR18650-LG-3500-MJ1 Cathode GITT+EIS Data Preprocessing This record contains workflows for packaging GITT measurements of an INR18650-MJ1 battery cell manufactured by LG CHEM at 25°C within Parquet files. Licensing This dataset is licensed under CC-BY 4.0, allowing for sharing and adaptation with proper attribution. Contact Information For questions or further assistance, please contact Dennis Kopljar at dennis.kopljar@dlr.de. References This dataset is linked to the following publication: [DOI/Link to publication]. Notes Legend for the dataset column names: "LINE": # of the step in the measurement device script "COMM": type of the step (Charge/Discharge/...); intermittent EIS measurements happen during "Set-Temp", since the measurement device links with the climate chamber "STATE": labels start (3) and end (2) of any step