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Correction to: Applied Nanoscience (2021) 11:1881-1888 https://doi.org/10.1007/s13204-021-018... In the online publication article, the author "Dhayalan Velauthapillai" affiliation was published incorrectly. The original article can be found online at https://doi.org/10.1007/s13204-021-01890-9. Correction to: Hydrothermal synthesis of Cu2Se-CoSe nanograin for electrochemical supercapacitor applications. [Extracted from the article]

The polyhedron-structured NiSe 2 @MoSe 2 (NMS) were magnificently produced through hydrothermal method, which makes the active electrode very effective in accessing the redox active sites in the charge/discharge process in supercapacitor applications. Systematic studies of the structural and morphological features of the unique polyhedron NMS were performed. Laser Raman spectra reported the vibrational and rotational modes of NMS. NMS exhibited a maximum 1000 F g -1 (138.8 mA h g -1 ) specific capacitance at 1 A g -1 and attained a capacity retention of 77.67% for 5000 stable cycles at 10 A g -1 using 1 M KOH as an electrolyte. The well assembled asymmetric supercapacitor NMS hydrolyzed for 18 h//AC demonstrated an outstanding electrochemical performance with an improved 305 F g -1 specific capacitance attained at 1 A g -1 with a good cycle life of 87.35% and a capacity retention of over 5000 cycles. Herein, the combined contribution of both the Ni and Mo ions offers a richer redox chemistry, which is beneficial to a higher electrochemical activity. The experimental results indicate that the NMS electrode could be used as a high-performance electrode., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)