Fabrication and electrical response of flexible supercapacitor based on activated carbon from bamboo

Abstract

We present the fabrication and electrical response of a flexible prototype supercapacitor based on activated carbon electrodes obtained from bamboo (Guadua angustifolia Kunth) as precursor. The supercapacitor prototype was fabricated by using a multilayer configuration method; activated carbon electrodes were impregnated with 0.5 M H2SO4 as electrolyte and filter paper was used as separator. Carbon activation was performed by using NaOH and KOH solutions. Activated carbon electrodes were characterized by adsorption isotherms, cyclic voltammetry, and SEM techniques. Electrical response was found by using charge‐discharge curves. Through adsorption isotherms analysis, we found a surface area of 408 and 309 m2 g−1 for the activated carbon with NaOH and KOH, respectively. From the electrical characterization analysis of the supercapacitor device, we obtained 0.92 F for the maximum capacitance value by using 0.5 V as fixed value in the bias voltage. Also, we proposed an equivalent electrical circuit for the supercapacitor prototype. This capacitance value is comparable with the capacitance values exhibited by rigid commercial supercapacitor, such as Dinacap and capacitor Capattery Gold, among others. Finally, these results suggest that the activated carbon from bamboo can be used in flexible electronic applications.

Synthesis activated carbon of pepper peel as supercapacitor electrodes

“…Based on the EDS test data, the silica content produced tends to be still high at 0.2% so that it affects the carbon element content formed as shown in Based on Figure 2, there is a difference in the width of the CV curve for each sample at the same scan rate of 1 mV/s. The wider the CV curve indicates the higher the specific capacitance value of the sample being tested, while the higher the slope of the CV curve indicates the greater the sample resistance value [10], [11], [13], [15], [16], [17]. In addition, the addition of AB causes the width of the CV curve to increase.…”

“…Biomass waste is activated chemically using chemical activator or physically at high temperature to be converted into activated carbon. This activated carbon will then be used as a medium for making supercapacitor electrodes [8], [9], [10], [11], [12]. However, studies on the utilization of biomass waste from pepper peels have not been widely reported.…”

Flexible solid-state hybrid supercapacitors for the internet of everything (IoE)

“…The historical development of supercapacitors can be divided into three primary stages according to the type of electrode materials and their mechanism of charge storage and transfer. 16 The first of these is the electric double layer capacitors (EDLCs), in which the electrode materials are primarily carbon-based, such as activated carbon, 17–22 carbon aerogel, 23–28 carbon nanotubes, 29–34 and carbon nanofibers. 35–42 The EDLCs store charge electrostatically, which does not include the transfer of charge between the electrode and electrolyte.…”

Recent Advanced Supercapacitor: A Review of Storage Mechanisms, Electrode Materials, Modification, and Perspectives

“…Activated carbon can be derived from a wide range of raw materials. Common precursor materials for preparing activated carbon include wood materials (including all types of wood [ 52 , 53 , 54 ], bamboo [ 55 , 56 , 57 ], and starch [ 58 , 59 , 60 ]), waste from agricultural and food industries (such as coconut shell [ 61 , 62 , 63 ], walnut shell [ 64 , 65 ], cocoa shell [ 66 , 67 ], banana peel [ 68 , 69 , 70 ], peanut peel [ 71 , 72 ], rice husks [ 73 , 74 ], bagasse [ 75 , 76 ], and tea leaves [ 77 , 78 ]), coal-based materials (anthracite [ 79 , 80 ], bitumen [ 81 , 82 ], and lignite [ 83 , 84 , 85 ]), petroleum materials (petroleum coke [ 50 , 51 , 52 , 86 , 87 , 88 ], needle coke [ 53 , 54 , 55 , 89 , 90 ,…”