The data set to paper: Novel Acid-Assisted Polymerization Technique for Synthesis of Polyaniline Films at Room Temperature: Morphological Study and Supercapacitor Applications Stephen Boahene 1,2,*, Štěpán Potocký 1,2, Kateřina Aubrechtová Dragounová 2, Ondrej Szabó 2, Elena Tomšík 3, and Alexander KROMKA 2,* 1 Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 1902/2, 166 27, Prague 6, Czech Republic2 Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00, Prague 6, Czech Republic3 Institute of Macromolecular Chemistry AS CR, Heyrovsky nam. 2, 162 00 Prague 6, Czech Republic* Correspondence: boaheste@fel.cvut.cz (S.B.); kromka@fzu.cz (A.K.) Data manager: Kristýna Dostálová: dostalovak@fzu.cz Date of data collection: 5. 1. 2024 - 31. 7. 2024 All the data shown in the pictures are provided in X-Y format with described sample. Always, the respective figure to which the data belongs is provided in high resolution. The data are in the following formats: Figure 1: pdfFigure 2: pdf, csv, TIFFigure 3: pdf, TIFFigure 4: pdf, csvFigure 5: pdf, csvFigure 6: pdf, csv The comma-separated values file (csv) always contains the description of the columns in the first row. In the case of a composed image, the name of the file corresponds to the corresponding figure. Data acquisition and processing are provided in the Experimental part of the publication: DOI: 10.1021/acsomega.5c02109