Controllable synthesis of hierarchically porous polyaniline/MnO2 composite with wide potential window towards symmetric supercapacitor

Huang, Huabo; Li, Cheng; Luo, Jian; Huang, Juan; Yu, Peng; Li, Liang; Xiong, Chuanxi

doi:10.1016/j.colsurfa.2022.130199

Cited by 10 publications

(8 citation statements)

References 63 publications

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“…By means of the HR-TEM image, the lattice structure of Ag can be directly observed (Figure 4D). In selected observation region, the measured interplanar spacings are 0.21-0.22 and 0.18 nm, which correspond to the (111) and ( 200) crystal planes, 39,40 respectively, confirming the formation of Ag NPs.…”

Section: Resultsmentioning

confidence: 74%

“…Figure 2A exhibits the XRD patterns of Fe 3 O 4 , PMP, and PMPA‐2. It can be seen that all the diffraction peaks of Fe 3 O 4 can be found in the XRD patterns of PMP and PMPA‐2, whereas the wide peaks situated at 25.3° arise, which should be the characteristic peaks of vertically arranged PANI 40,43 . Comparing with PMP, the XRD pattern of PMPA‐2 exhibits obvious peaks at 38.2°, 44.4°, 64.6°, and 77.5°, corresponding well to the (111), (200), (220), and (311) crystal planes of Ag 0 (JCPDS: 04–0783), directly demonstrating the successful formation of Ag metal 44,45 .…”

Section: Resultsmentioning

confidence: 91%

“…Figure 2A characteristic peaks of vertically arranged PANI. 40,43 Comparing with PMP, the XRD pattern of PMPA-2 exhibits obvious peaks at 38.2 , 44.4 , 64.6 , and 77.5 , corresponding well to the (111), ( 200), (220), and (311) crystal planes of Ag 0 (JCPDS: 04-0783), directly demonstrating the successful formation of Ag metal. 44,45 In the FT-IR spectrum of PMP (Figure 2B), the peaks at 1581 and 1482 cm À1 are the characteristic peaks of C N and C C stretching vibrations of quinone and benzene structures.…”

Section: Resultsmentioning

confidence: 92%

“…Figure 1 shows the preparation procedure of PMPA based on the 3D porous PANI platform, which was formed through the oxidation polymerization of An and crosslinking using PA. [38][39][40] It is worth noting that each PA molecule contains six phosphoric acid groups and can gives rise to electrostatic interaction with several PANI chains, so that it can serve as both crosslinker and dopant to assist the formation of 3D porous nanostructure within the product. 38 In an effort to endow composite with magnetism, the commercialized Fe 3 O 4 NPs were directly added into precursor solution.…”

Section: Resultsmentioning

confidence: 99%

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Three‐dimensional porous magnetic polyaniline supported Ag nanoparticles nanocomposites as an efficient and recyclable catalyst for nitrophenol reduction

Huang,

Li,

Zhang

et al. 2023

Polymer Composites

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Ag nanoparticles (Ag NPs) nanocomposites are promising catalysts for nitro compound reduction, but simultaneously meeting the requirements of high catalytic activity, stability, recyclability and facile preparation is highly difficult. Herein, the three‐dimensional (3D) porous magnetic polyaniline (PANI) was synthesized using phytic acid (PA) as the dopant/crosslinker, and a recyclable PANI/Ag NPs nanocomposite (PMPA) was obtained through the in situ redox between PANI and AgNO3. Characterization results demonstrate that PMPA exhibits a typical 3D porous structure constructed by coral‐like PANI framework with well‐dispersed Ag NPs (10–20 nm) firmly anchored. The PMPA can efficiently catalyze the 4‐nitrophenol (4‐NP) reduction, with a reaction rate constant of 9.5 × 10−3 s−1 (and 1067.4 s−1 g−1), which is highly competitive to the previously reported high‐performance Ag NPs catalysts. This is probably due to the favorable mass/electron conduction of 3D porous structure and strong interaction between PA and Ag. Moreover, the magnetism renders PMPA recyclability via a simple magnetic attraction, and the reaction rate constant remains at a high level after six reuse cycles, up to 4.8 × 10−3 s−1. This work highlights the important role of 3D porous PANI in structure of Ag NPs nanocomposites, and paves a new way to develop recyclable catalysts with facile preparation and high catalytic performance.Highlights Facile synthesis via in situ reaction between 3D porous PANI and AgNO3. Stable dispersion and strong anchor attributed to phytic acid. Conductive porous structure to facilitate mass/electron transportation. Outstanding catalytic performance for 4‐NP reduction and recycle by magnetism.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Three‐dimensional porous magnetic polyaniline supported Ag nanoparticles nanocomposites as an efficient and recyclable catalyst for nitrophenol reduction

Huang,

Li,

Zhang

et al. 2023

Polymer Composites

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“…In comparison to other composite electrode materials, PANI@(MnO 2 + NiO)@GO demonstrates superior performance. For instance, it outperform cross‐linked polymer‐based porous carbonaceous materials (19.5 W h kg −1 and 400 W kg −1 ), 42 PANI/MnO 2 /nitrogen and co‐doped phosphorus carbon nanofibers composites (23.3 W h kg −1 and 174.9 W kg −1 ), 40 PANI/MnO 2 composites with polyaniline hydrogel as a substrate (23.2 W h kg −1 and 720 W kg −1 ), 36 PANI, MnO 2 and graphene nanosheet nanocomposites (5.63 W h kg −1 and 1417.34 W kg −1 ), 5 and PANI and carbon nanocomposite hydrogels (PCR) (31.32 W h kg −1 and 364.93 W kg −1 ), 43 as depicted in Figure 8c. Figure 8d shows the specific capacitance that remains at 74.2% at a high current density of 10 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Polyaniline/manganese nickel oxide/graphene composites as electrode materials for supercapacitors

Ma,

Fu,

Wei

et al. 2023

J of Applied Polymer Sci

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This study introduces a novel electrode material featuring a core‐shell intercalation structure. The material was synthesized using a simple and scalable method suitable for industrial replication. The outer layer of the electrode material comprises polyaniline, enveloping a nuclear structure composed of manganese dioxide and nickel oxide. This core‐shell configuration is then integrated into the lamellar structure of graphene oxide, resulting in the formation of PANI@(MnO2 + NiO)@GO composite. The combination of polyaniline, metal oxides, and graphene oxide demonstrates robust adsorption capacity, leading to the development of a three‐dimensional stable structure between the core and the shell. Additionally, graphene oxide contributes to the bilayer capacitance of the composites, resulting in simultaneous multiple synergistic effects and improved charge storage capacity. Electrochemical characterization reveals exceptional properties of this composite material, exhibiting a specific capacitance of 396 F g−1 at a current density of 0.5 A g−1 in a three‐electrode configuration. Furthermore, the material retains 82.6% of its capacitance after undergoing 3000 consecutive charge/discharge cycles. Calculations estimate the energy density and power density of this composite in a supercapacitor employing 1 M Na2SO4 electrolyte to be 43.2 W h kg−1 and 249.99 W kg−1, respectively.

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Graphene wrapped porous polyaniline/manganese oxide nanocomposites with enhanced structural stability and conductivity for high‐performance symmetric supercapacitor

Zheng,

Zhu,

et al. 2024

Polymer Composites

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Manganese oxides have emerged as promising electrode materials for supercapacitors. Despite extensive efforts to improve their conductivity and structural stability through various manganese oxide/conductor nanocomposites, achieving efficient and reliable energy storage electrode materials has remained challenging. In this study, we propose a meticulous “dual enhancement” strategy, where three‐dimensional (3D) nanostructured polyaniline/manganese oxide composites (PM) are synthesized via an in situ method and further integrated with graphene wrapping to form polyaniline/manganese oxide/graphene nanocomposites (PMG). Electrochemical characterization reveals that PMG exhibits a remarkable specific capacitance of up to 403 F g−1 (at 1 A g−1), with a favorable capacitance retention of 80.2% after 5000 cycles, along with a wide potential window. This enhancement is attributed to the synergistic effects of polyaniline, which provides a supportive framework and electron transport pathways, and graphene, which offers external protection and enhances conductivity pathways. Assembled symmetrical supercapacitors demonstrate outstanding energy density (32.7–23.3 Wh kg−1) and power density (720–4500 W kg−1) at a high operating voltage of 1.8 V, surpassing the performance of many reported high‐performance supercapacitors. This study provides valuable insights for advancing manganese oxide electrode materials and is expected to catalyze their widespread adoption in energy storage applications.Highlights “Dual enhancement” is implemented by PANI supporting and rGO wrapping. The conductivity and structural stability of composite electrode is greatly enhanced. Improved capacitance (403 F g−1, 1 A g−1) and cycling stability (80.2%) is achieved. The symmetrical supercapacitor has high voltage and energy density (32.7 Wh kg−1).

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Controllable synthesis of hierarchically porous polyaniline/MnO2 composite with wide potential window towards symmetric supercapacitor

Cited by 10 publications

References 63 publications

Three‐dimensional porous magnetic polyaniline supported Ag nanoparticles nanocomposites as an efficient and recyclable catalyst for nitrophenol reduction

Three‐dimensional porous magnetic polyaniline supported Ag nanoparticles nanocomposites as an efficient and recyclable catalyst for nitrophenol reduction

Polyaniline/manganese nickel oxide/graphene composites as electrode materials for supercapacitors

Graphene wrapped porous polyaniline/manganese oxide nanocomposites with enhanced structural stability and conductivity for high‐performance symmetric supercapacitor

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