2018
DOI: 10.1039/c7cp07156f
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A high-performance electrochemical supercapacitor based on a polyaniline/reduced graphene oxide electrode and a copper(ii) ion active electrolyte

Abstract: Active electrolyte enhanced supercapacitors (AEESCs) have received increasing attention because of their large specific capacitance and easy fabrication process. The better matching between the active electrolyte and the counter electrode and the slow self-discharge rate are the challenges of this type of supercapacitor. In this paper, a novel AEESC with polyaniline/reduced graphene oxide hydrogel (PANI/RGOHG) as the anode and Cu(ii) ions as the cathodic active electrolyte is constructed. Experimental results … Show more

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Cited by 42 publications
(9 citation statements)
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“…It can be observed that HGPG-based SSC possesses an ultrahigh rate performance, having an excellent capability within a wide range of current densities from 1 to 100 A•g −1 and a retention of 43% at a very high current density of 100 A• g −1 compared relatively with that at 1 A•g −1 . Because of the hierarchical porous sandwich-like structure, the rate performance of HGPG-based SSC is much superior to those previously reported PANI-based materials, such as 3D RGO aerogel with PPy/PANI nanotubes (54% from 0.5 to 10 A•g −1 ), 60 PANI/ RGOHG//RGOHG (75% from 1.3 to 5.2 A•g −1 ), 61 and RGO/S-PANI (70% from 1 to 40 A•g −1 ). 62 In order to investigate how the energy density varies with the power density of HGPG-based SSC, a Ragone diagram is provided in Figure 4e.…”
Section: Resultsmentioning
confidence: 68%
“…It can be observed that HGPG-based SSC possesses an ultrahigh rate performance, having an excellent capability within a wide range of current densities from 1 to 100 A•g −1 and a retention of 43% at a very high current density of 100 A• g −1 compared relatively with that at 1 A•g −1 . Because of the hierarchical porous sandwich-like structure, the rate performance of HGPG-based SSC is much superior to those previously reported PANI-based materials, such as 3D RGO aerogel with PPy/PANI nanotubes (54% from 0.5 to 10 A•g −1 ), 60 PANI/ RGOHG//RGOHG (75% from 1.3 to 5.2 A•g −1 ), 61 and RGO/S-PANI (70% from 1 to 40 A•g −1 ). 62 In order to investigate how the energy density varies with the power density of HGPG-based SSC, a Ragone diagram is provided in Figure 4e.…”
Section: Resultsmentioning
confidence: 68%
“…These results demonstrate the efficient rate capability of the rGO@PANI-NR nanocomposite electrodes working by high current densities, which is desired for practical applications of highrate supercapacitors. Additionally, the rate capabilities of both SC types are remarkably comparable with the results of other research groups; rGO/carbon derived from PANI electrodes (sandwich type: 64% current density ranging from 0.1 to 1 A/ g), 47 PANI-functionalized carbon cloth electrodes (sandwich type: 56% current density ranging from 1 to 20 A/g), 48 PANI/ rGO/multiwalled carbon nanotubes (sandwich type: 65% current density ranging from 1 to 10 A/g), 49 3D rGO aerogel with PPy/PANI nanotubes (sandwich type: 60% current density ranging from 0.5 to 10 A/g), 50 PANI/rGO hydrogel|| rGO hydrogel (sandwich type: 75% current density ranging from 1.3 to 5.2 A/g), 51 nitrogen-doped reduced graphene oxide microelectrodes (planar: 12% current density ranging from 20 to 500 mA/cm 2 ), 52 MnO 2 electrodes (planar: 57.3% current density ranging from 0.1 to 2.0 mA/cm 2 ). 53 Initiating the discharge process, the potential drops slightly.…”
Section: Resultsmentioning
confidence: 99%
“…A charge–discharge experiment was conducted in different potential windows at different current densities of 1, 2, 3, 4, 5, 10 and 20 Ag −1 . The specific gravimetric capacitance ( C s ) was calculated using eqn (2) 48 In which, Q is the current density during the discharge process (A), Δ T is the discharge time (s), V is the potential window difference and iR is the internal resistance voltage drop at the beginning of the discharge.…”
Section: Methodsmentioning
confidence: 99%