Experimental dataset on the structural changes during cell cycling and overall electrochemical performance of a synthesized alluaudite sodium iron sulfate cathode material

This dataset contains the results of experimental studies conducted within the research project funded by the Narodowe Centrum Nauki (NCN), grant no. 2021/43/I/ST8/01125. The dataset includes raw data used to make figures in the following publication: Acta Materialia Volume 301, 1 December 2025, 121582, https://doi.org/10.1016/j.actamat.2025.121582. This dataset contains: diffractograms showing the crystal structure of the cathode material, cell discharge/charge curves for different currents and different numbers of cycles, FTIR and Raman spectroscopy results, and diffractograms taken at different points during cell discharge/charge.