Solar reduced porous graphene incorporated within polyaniline network for high-performance supercapacitor electrode

Ahirrao, Dinesh J.; Mohanapriya, K.; Wilson, Higgins M.; Jha, Neetu

doi:10.1016/j.apsusc.2020.145485

Cited by 29 publications

(10 citation statements)

References 76 publications

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“…The peaks at 1592 and 1504 cm −1 were attributed to the C=C stretching vibration of the quinone and benzene ring, respectively. The peaks at 1306, 1242, 1162, and 829 cm −1 were assigned to the C−N stretching of the aromatic secondary amine, C−N + stretching of the polarized structure, and in‐plane and out‐of‐plane of C−H bending vibration, respectively, which were consistent with previous FTIR spectra of PANI [25–28] . After adding Nafion, the new peak at 1042 cm −1 can be assigned to the symmetric stretching of the SO 3 2− group in Nafion (Figure 2a and S5), and the intensity of the C−N + peak increases with increasing Nafion content (Figure 2a), indicating that the Nafion was doped into PANI.…”

Section: Resultssupporting

confidence: 88%

“…The peaks at 1306, 1242, 1162, and 829 cm À 1 were assigned to the CÀ N stretching of the aromatic secondary amine, CÀ N + stretching of the polarized structure, and in-plane and out-of-plane of CÀ H bending vibration, respectively, which were consistent with previous FTIR spectra of PANI. [25][26][27][28] After adding Nafion, the new peak at 1042 cm À 1 can be assigned to the symmetric stretching of the SO 3 2À group in Nafion (Figure 2a and S5), and the intensity of the CÀ N + peak increases with increasing Nafion content (Figure 2a), indicating that the Nafion was doped into PANI. The inplane CÀ H stretching vibration of PANI at 1162 cm À 1 showed a low wavenumber shift (or red shift) with increasing Nafion content (Table S1), which can be attributed to the electrostatic interactions between the sulfonate group of Nafion and the amino group of PANI.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced Specific Capacitance and Stability of Polyaniline by Nafion Doping

Xia

et al. 2022

ChemElectroChem

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Polyaniline (PANI) is a promising electrode material for supercapacitors, but its reported specific capacitance is much lower than its theoretical capacitance. This is because the PANI molecular chains are tightly packed, and the electrolyte is left with a difficult path to penetrate into the interior regions of PANI. Large anions can be doped into PANI and expand the distance between adjacent PANI molecular chains, thereby increasing the utilization of PANI. In this work, Nafion-doped PANI was synthesized by in situ chemical polymerization in aniline monomer and Nafion solution and the Nafion content was tuned to improve the overall performance. The specific capacitance of Nafion-doped PANI with an optimized Nafion content (4.76 wt %) reached 603.9 and 378.4 F/g at 1 and 50 mV/s), which are both higher than that of PANI (580.0 and 347.7 F/g at 1 and 50 mV/s). The capacitance retention of Nafion (16.67 wt %)-doped PANI was 64.89 % after 1000 cycles, which is better than that of PANI alone (20.25 %). This work provides a facile approach to increasing the utilization of PANI as an electrode material for supercapacitors.[a] X.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Enhanced Specific Capacitance and Stability of Polyaniline by Nafion Doping

Xia

et al. 2022

ChemElectroChem

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“…It exhibits an energy density of 13.49 Wh/Kg at a power density of 699.8 W/Kg. Ahirrao et al 68 successfully synthesized solar‐reduced porous graphene (SRPG) and polyaniline (PANI) nanocomposites by in situ oxidation polymerization. This unique branched structure enhances the porosity and surface area of the resulting PANI‐SRPG, which facilitates the ion diffusion and charge storage processes.…”

Section: Binary Complexesmentioning

confidence: 99%

Carbon nanomaterials and their composites for supercapacitors

2022

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As a type of energy storage device between traditional capacitors and batteries, the supercapacitor has the advantages of energy saving and environmental protection, high power density, fast charging and discharging speed, long cycle life, and so forth. One of the key factors affecting the performance of supercapacitor is the electrode material. Carbon materials, such as carbon nanotube, graphene, activated carbon, and carbon nanocage, are most widely concerned in the application of supercapacitors. The synergistic effect of composites can often obtain excellent results, which is one of the common strategies to increase the electrochemical performance of supercapacitors. To further improve the performance of binary composites, it is a relatively simple method to increase the components as the "bridge" between the two materials to form the ternary composites. The review mainly introduces the current research progress of supercapacitors with pure carbon nanomaterials and multistage carbon nanostructures (composites) as electrodes. The characteristics and application directions of different pure carbon nanomaterials are introduced in detail. Different ways of multilevel structure (material) composite have their own effects on the development of high-performance supercapacitors. We also highlight the recent advances related to these fields and provide our insight into high-energy supercapacitors.

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“…Furthermore, their GCD curves exhibit a symmetrical triangular shape with a negligible internal resistance (IR) drop, which further proves an ideal reversible capacitance characteristic and small intrinsic resistance from electrodes and electrolyte. Still, the high symmetry of CV curves remains at a wide range of scan rates up to 100 mV s −1 and GCD plots at various current densities ( Figures S12–S14 A and S14B) comparable with those employing liquid electrolytes ( Adusei et al., 2019 ; Ahirrao et al., 2020 ), which reveals excellent reaction reversibility and rate capability for all three devices. Based on electrochemical impedance spectra (EIS), Nyquist plots in Figure 2 C further reveal the kinetics information of energy storage process.…”

Section: Resultsmentioning

confidence: 56%

A Regenerable Hydrogel Electrolyte for Flexible Supercapacitors

Zhou

Yang

et al. 2020

iScience

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Summary Easy regenerability of core components such as electrode and electrolyte is highly required in advanced electrochemical devices. This work reports a reliable, regenerable, and stretchable hydrogel electrolyte based on ionic bonds between polyacrylic acid (PAA) and polyallylamine (PAH). PAA-PAH electrolyte (1M LiCl addition) exhibits high ionic conductivity (0.050 S·cm-1) and excellent mechanical property (fracture strain of 1,688%). Notably, the electrolyte can be regenerated to any desired shape under mild conditions and remains 96% and 90% of the initial ionic conductivity after the first and second regeneration, respectively. PAA-PAH/LiCl-based supercapacitor exhibits nearly 100% capacitance retention upon rolling, stretching, and 5,000 charge-discharge cycles, whereas the regenerated device holds 97.6% capacitance of the initial device and 90.9% after 5,000 cycles. This low-cost, high-efficiency, and regenerable hydrogel electrolyte reveals very promising use in solid-state/flexible supercapacitors and possibly becomes a standard commercial hydrogel electrolyte for sustainable electrochemical energy devices.

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Solar reduced porous graphene incorporated within polyaniline network for high-performance supercapacitor electrode

Cited by 29 publications

References 76 publications

Enhanced Specific Capacitance and Stability of Polyaniline by Nafion Doping

Enhanced Specific Capacitance and Stability of Polyaniline by Nafion Doping

Carbon nanomaterials and their composites for supercapacitors

A Regenerable Hydrogel Electrolyte for Flexible Supercapacitors

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