Fig. 7
From: Deformable devices with integrated functional nanomaterials for wearable electronics
Energy storage devices based on 1D/2D carbon nanomaterials. a Schematic microstructure of cotton fabric with random networks of CNTs inside. b Photograph of the cotton fabric dipped in the CNT ink. c Structure of the fabric-based supercapacitor (top) and a photograph when it is stretched (bottom). d Schematic of the SWNT/cotton fiber electroplated with MnO2 nanoparticles. e Specific capacitances of the supercapacitors with (red) and without (black) MnO2 within the current density range of 0–10 mA/cm2. (a–e Reproduced with permission from Ref. [49], © 2010, American Chemical Society). f Schematic of the vertical CNT forest grown on the carbon fabric and electroplated with RuO2 nanoparticles. g Schematic exploded view of the carbon-fabric-based wearable supercapacitor. h Galvanostatic charge–discharge curves of the wearable supercapacitor at different bending angles. i Photograph showing the fabric-based supercapacitor while bent. j Areal capacitances of the supercapacitor for different charge–discharge cycles. (f–j Reproduced with permission from [45], © 2014, WILEY–VCH Verlag GmbH & Co. KGaA, Weinheim). k Photograph of the GP-stacked film. l–m SEM images of the cross sections of the GP film with l 78.9 and m 27.2 vol% of H2SO4. n Specific and o volumetric capacitances of the GP-based supercapacitors with different packing densities (ρ) for different current densities. (k–o Reproduced with permission from Ref. [15], © 2013, American Association for the Advancement of Science)