2-Methylimidazole assisted synthesis of nanocrystalline shell reinforced PPy hydrogel with high mechanical and electrochemical performance

Tang, Shunhe; Yu, Chuying; Liu, Xinxin; Fu, Danchen; Liao, Wentao; Xu, Feng; Zhong, Wenbin

doi:10.1016/j.cej.2021.133033

Cited by 24 publications

(12 citation statements)

References 79 publications

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“…The chemical structure and functional group of the samples were further investigated by FTIR (Figure a and S4a). The pure PPy nanotubes displayed the characteristic FTIR peaks related to N–H bonds (∼3410 cm –1 ), CC symmetric stretching (∼1540 cm –1 ), and C–H in-plane stretching vibrations (∼1460 cm –1 ) of the pyrrole ring, C–H in-plane bending absorption (∼1301 cm –1 ), C–N (∼1163 cm –1 ) and C–H (∼1030 cm –1 ) stretching vibrations, and C–H out-of-plane bending absorption (∼890 cm –1 ). ,, Pure PANI displayed FTIR peaks corresponding to N–H bonds (∼3410 cm –1 ) and the CC stretching vibration of the quinonoid ring (∼1560 cm –1 ) and the benzenoid ring (∼1450 cm –1 ). The latter two peaks confirmed the doped conductive state of PANI .…”

Section: Resultsmentioning

confidence: 99%

“…15,47 Additional peaks at 402.1 and 396.0 eV corresponding to �N + -and the Mo−N bond are also observed in PPMS-Fe composites. 29,35 Similarly, the Mo−N bond signal peak also exists in the spectra for PPMS-APS composites but not PMSP-Fe composites. The appearance of a Mo−N bond verifies the strong interaction between MoS 2 and the polymer, which can benefit both the electron transfer at the interface and the structural stability of the composites.…”

Section: Morphology and Structure Characterizationmentioning

confidence: 96%

“…The GCD curves of the PPMS-Fe electrode display a quasi-triangular shape with a distinct voltage plateau at various current densities (Figure 4f), which confirms its pseudocapacitive behavior and ideal Coulombic efficiency. 29,50 The high capacitance performance of the PPMS electrode is inseparable from the reversible redox reaction originating from pseudocapacitive material, as shown in the following:…”

Section: Electrochemical Performancementioning

confidence: 99%

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PPy/PANI@MoS₂ Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors

Wang

Yang

Dai

et al. 2023

ACS Appl. Energy Mater.

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While asymmetric supercapacitors (ASCs) have huge potential as efficient, durable, and cost-effective energy storage devices, they fail to meet expectations because of the unoptimized architecture and composition of their electrode materials. Herein, PPy/PANI@MoS 2 (PPMS) ternary composites with a dual-channel structure are obtained by facile hydrothermal and in situ polymerization methods. These dual conductive channels synergistically improve the electrode's electrical conductivity, facilitate ion diffusion, enlarge the interlayer distance, and increase the accessible surface area. Taking advantage of such a favorable architecture, PPMS composites exhibit outstanding electrochemical properties, including a huge specific capacitance (1171 F g −1 at 1 A g −1 ) and rate capability (861 F g −1 at 20 A g −1 ) in three-electrode systems. Based on charge storage mechanism analyses, we demonstrate that the kinetic behavior of PPMS electrodes is dominated by the surface capacitance (95.9% at 100 mV s −1 ). Besides, PPMS-based ASCs (PPMS//activated carbon) operate in a broad voltage window (1.8 V), delivering an ultrahigh energy density of 93.4 Wh kg −1 at a power density of 884.8 W kg −1 . They also show a superior cycling stability of 90.4% and a remarkable Coulombic efficiency of 99.2% for 10,000 cycles. This work affords an inspiration for rational structural optimization of PANI-based electrode materials with great prospects in the development of next-generation high energy density ASCs.

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Section: Resultsmentioning

confidence: 99%

Section: Morphology and Structure Characterizationmentioning

confidence: 96%

Section: Electrochemical Performancementioning

confidence: 99%

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PPy/PANI@MoS₂ Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors

Wang

Yang

Dai

et al. 2023

ACS Appl. Energy Mater.

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“…Different from the negligible hysteresis of PAS gel and PVA/PAS gel, the PVA/PAS–PPy gel exhibits a pronounced loop during the cyclic load process, indicating that the PPy is the primary contributor to the toughness of the gel and energy dissipation is mainly originated from the π–π stacking between the PPy–PPy and PPy–PVBIPS (Figure S6). The area of the hysteresis loop reduces significantly in the second cycle and remains almost unchanged as 110–114 kJ/m 3 in the following successive nine cycles owing to the fact that bonds ruptured in the first cycle cannot be repaired immediately . The gel of f vbips = 50% is selected for the following investigations due to its excellent comprehensive properties with Young’s modulus of 0.64 MPa and conductivity of ∼0.014 S/m.…”

Section: Resultsmentioning

confidence: 99%

Anti-Swelling Zwitterionic Hydrogels as Multi-Modal Underwater Sensors and All-in-One Supercapacitors

Wang

Zhang

et al. 2022

ACS Appl. Polym. Mater.

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Although hydrogel-based electronic devices have received a lot of interest for good flexibility, biocompatibility, and multifunctionality over the past decades, underwater instability (especially in saline solutions) still limits their practical applications to a wide range. Herein, a class of tough, conductive, and anti-swelling double-network hydrogel is developed by combining the zwitterionic poly(acrylamide-co-(3-(1-(4-vinylbenzyl)-1H-benzo[d]imidazole-3-ium-3-yl) propane-1-sulfonate)) chemical network and water-resistant polyvinyl alcohol physical network with conducting polypyrrole. The resultant gel exhibits considerable mechanical strength (0.65 MPa), stable swelling dynamics in water and seawater, as well as excellent ionic conductivity (3.96 S/m). Furthermore, the assembled gel-based sensor shows distinct strain/temperature bi-modal detection. Moreover, by controlling the dimension of conductive networks, an all-in-one supercapacitor can be obtained, with ultra-high capacitance (299.79 mF/cm2) and power density (2.49 mW/cm2). We believe that this strategy will inspire researchers to develop more reliable underwater, self-powered multi-modal sensing devices in the future.

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“…However, their practical applications require a careful balance of properties, including high sensitivity to external deformation, self-healing capability, and mechanical robustness, which includes high strength, toughness, and stretchability 9,10 . Currently, conductive hydrogels are created by incorporating various conductive phases, such as nanomaterials (e.g., graphene 11 , CNT 12 , MXene [13][14][15] , and Ag nanoparticles 16 ), conductive ions (e.g., metal ions 17 and ionic liquid 18 ), and conductive polymers (e.g., PEDOT:PSS 19 , PANI 20 , and PPy 21 ), into the hydrogel matrix. Unfortunately, the weak molecular-level bond between conductive phases and hydrogel matrices, coupled with the disordered structural distribution, signi cantly limit their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Strong and Tough Conductive Hydrogel with High Sensitivity via Self-Assembly-Induced Bridge Crosslinking

Zhao

et al. 2023

Preprint

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Conductive hydrogels possess remarkable potential for applications in soft electronics and robotics, owing to their unique combination of high electrical conductivity, stretchability, and impressive self-healing capabilities. Nonetheless, the limited strength and toughness of these hydrogels have traditionally impeded their practical implementation. Inspired by the hierarchical architecture of high-performance biological composites found in Nature, this study successfully fabricates a novel type of strong and tough conductive hydrogel through self-assembly-induced bridge crosslinking of MgB2 nanosheets and polyvinyl alcohol (PVA) hydrogels. By combining the micro- to nano-level hierarchical lamellar structures of PVA hydrogels with the robust molecular-level B-O covalent bonds, the resulting conductive hydrogel exhibits an exceptional strength of 8.58 to 32.7 MPa and a high toughness of 27.56 to 123.3 MJ/m3. Moreover, the hydrogel demonstrates exceptional sensitivity (with a response/relaxation time of 20ms and a detection lower limit of ~ 1Pa) under external deformation, thanks to its nanoscale MgB2 nanosheets/PVA lamellar structure and extremely low compressive modulus. These unique characteristics enable the conductive hydrogel to exhibit superior performance in advanced soft sensing applications, particularly in non-contact speaking detection. This study represents a major breakthrough, introducing a new class of conductive hydrogel that integrates exceptional strength, toughness, and sensitivity, thereby opening up exciting possibilities for the development of high-performance conductive hydrogels.

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2-Methylimidazole assisted synthesis of nanocrystalline shell reinforced PPy hydrogel with high mechanical and electrochemical performance

Cited by 24 publications

References 79 publications

PPy/PANI@MoS₂ Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors

PPy/PANI@MoS₂ Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors

Anti-Swelling Zwitterionic Hydrogels as Multi-Modal Underwater Sensors and All-in-One Supercapacitors

Strong and Tough Conductive Hydrogel with High Sensitivity via Self-Assembly-Induced Bridge Crosslinking

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2-Methylimidazole assisted synthesis of nanocrystalline shell reinforced PPy hydrogel with high mechanical and electrochemical performance

Cited by 24 publications

References 79 publications

PPy/PANI@MoS2 Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors

PPy/PANI@MoS2 Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors

Anti-Swelling Zwitterionic Hydrogels as Multi-Modal Underwater Sensors and All-in-One Supercapacitors

Strong and Tough Conductive Hydrogel with High Sensitivity via Self-Assembly-Induced Bridge Crosslinking

Contact Info

Product

Resources

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PPy/PANI@MoS₂ Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors

PPy/PANI@MoS₂ Composites with a Dual-Channel Architecture for Advanced Asymmetric Supercapacitors