Fig. 3. (a) CV curves of Fe3O4 and MnO2 electrodes in a 21 M LiTFSI electrolyte, (b) galvanostatic charge/discharge curves and (c) specific energy retention of an asymmetric supercapacitor of Fe3O4/21 M LiTFSI/MnO2 (modified from ref. 53, copyright permission from Elsevier); (d) schematic of the fabrication processes for a MnOx@TiN nanowire@carbon nanotube fiber and C@TiN electrode-based asymmetric fiber supercapacitor with an ionic liquid gel electrolyte (modified from ref. 59, copyright permission from the Wiley-VCH).
