Poly Ortho Aminophenol Research Articles

Enhanced pseudocapacitance performance of conductive polymer in the presence of synthesized mesoporous MnO2@Zeolite-Y

In the current study, mesoporous MnO2@Zeolite-Y (MOZ) was synthesized using the ultrasonic method. Then, MOZ was utilized to enhance the electrochemical behavior of poly ortho-aminophenol (POAP) conducting polymer. The POAP/MnO2@Zeolite-Y (MOZ/POAP) composite was synthesized by electropolymerization over the zeolite-modified working electrode surface. To investigate and compare the electrochemical behavior of the synthesized materials, two electrodes of MOZ and MOZ/POAP were designed. Subsequently, the electrochemical characteristics of the two mentioned electroactive compounds were evaluated by galvanostatic charge/discharge (GCD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) tests in a three-electrode setup. The comparison of the results revealed that the MOZ/POAP electrode had a more significant performance and recorded a specific capacitance (Cs) of 422 F g−1 at 1 A g−1 and cyclic stability of 97.2 % over 10,000 cycles. After verifying this electrode's remarkable efficacy, a symmetric supercapacitor of MOZ/POAP was designed and analyzed by CV and GCD techniques in a two-electrode system. This electrode revealed a Cs of 184 F g−1 at 1 A g−1, energy density of 12.02 Wh kg−1, power density of 275 W kg−1, and cyclic stability of 95.7 % over 10,000 cycles. This impressive performance was due to the presence of the manganese metal in MOZ and nitrogen and oxygen species of POAP in improving the pseudocapacitance behavior, POAP as a conductive chemical and mesoporous zeolite-Y for enhancing the electrical double-layer behavior of the electrode by providing a medium for electrochemical reactions.

Activated carbon derived from fennel flower waste as high-efficient sustainable materials for improving cycle stability and capacitance performance of electroactive nanocomposite of conductive polymer

In the present work, activated carbon (AC) was obtained from low-cost biowaste of black seed fennel flower (Lc-FF) through facile chemical activation. However, activated fennel flower (Ac-FF) exhibited relatively stable electrochemical performance among ACs, to enhance the electrochemical properties such as cyclic stability, energy density, power density, and specific capacitance (Cs), combined with functionalized graphene oxide (FGO). Then, to obtain POAP/FGO/Ac-FF (ternary nanocomposite), an extremely-slim layer of Poly-orthoaminophenol (POAP) was coated on the binary nanocomposite (FGO/Ac-FF). From the SEM and TEM images, the layered structure of the nanocomposite surface was visible, which led to the acceleration of ion transfer rate. In addition, an excellent specific surface area (SSA) of 2199.2 m2.g−1 was achieved via Brunauer-Emmett-Teller (BET) analysis. Electrochemical analyses including galvanostatic charge-discharge (GCD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) were conducted to evaluate and compare the energy storage behavior of electrode materials. In a three-electrode system, the Cs value for the ternary nanocomposite electrode was calculated 1400.2 F.g−1 at 2 A.g−1. Besides, this material exhibited excellent cyclic stability with 94.4 % capacity retention after 5000 continuous charge-discharge cycles. This work provides new insights into the development of biowaste-based electrodes for high-performance supercapacitors (SCs).

Mesoporous ionic liquid functionalized nanozeolite: Synthesis and high efficient material to improving pseudocapacitance performance of conductive polymer

Supercapacitors are emerging as a competitive candidate for electrochemical energy storage owing to their greater power outputs and longer cycle life than rechargeable batteries. In this work, a chloropropyl grafted zeolite-NaY modified with imidazolium chloride ionic liquid (Im-Cl IL@ZY) has been successfully synthesized by a chemical method. Notably, the imidazolium chloride ionic liquid enhances the electrical contact between zeolite network and conductive polymer film (poly ortho aminophenol) because of its high conductivity and good compatibility with different substances. The synergistic effect of the most efficient composite endows the hybrid electrode with a high specific capacitance of 665 F/g F g−1 at 1 A g−1 and reliable cycling stability of 88 % capacitance retention after 8000 cycles. Moreover, a symmetric supercapacitor based on the composite electrodes achieves a high energy density of 36.7 W h kg−1 at a power density of 485 W kg−1. Results highlight that POAP/Im-Cl IL@ZY composites are promising materials for energy storage devices with long cycling stability.

Functionalized graphene oxide/activated carbon from canola waste as sustainable nanomaterials to improve pseudocapacitance performance of the electroactive conductive polymer

In this work, the electrochemical energy storage performance of activated carbon (AC) derived from canola waste (Can) was investigated as a supercapacitor (SC) electrode material. So, in an innovation, activated canola (Ac-Can) was combined with functionalized graphene oxide (FGO) in an optimal ratio. The functionalization of graphene oxide (GO) via Ketoconazole was performed applying a multi-step chemical method. Then, through the electropolymerization process, an ultra-thin film layer of poly ortho aminophenol (POAP) fabricated on the surface of the working electrode. The highly porous surface of the ternary nanocomposite (POAP/FGO/Ac-Can) is recognized through scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) images. Also, through Brunauer–Emmett–Teller (BET) analysis, the specific surface area (SSA) of Ac-Can was determined to be 2200 m2·g−1. The Cs of 1350.5 F·g−1 at a current density of 2 A·g−1 and retention of 96.2% initial capacitance after 5000 continuous charge-discharge cycles, verified the superior performance of the ternary nanocomposite. Consequently, this research reveals a clear horizon of biowaste-based materials with advantages such as cost-effectiveness, environmental friendliness, and sustainability.

Facile electrosynthesis and characterization of Poly Ortho Amino Phenol/MoS2/MnO2 nanocomposite as a new supercapacitor

In this research, two new nanocomposites of MoS2/MnO2 and Poly Ortho Amino Phenol (POAP)/MoS2/MnO2 are used for application in supercapacitor electrodes. The MoS2/MnO2 composites were synthesized without any impurity through by hydrothermal method and then ternary POAP/MoS2/MnO2 composite was synthesized by the electrochemical method on the Glassy Carbon Electrode. The structure, morphology and surface area of prepared samples are characterized by XRD, XPS, FTIR, EDX, FESEM, TEM, and BET. Electrochemical measurement of electrodes was studied by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). The supercapacitor performance of the POAP/MoS2/MnO2 composite shows a high specific capacitance of 529 Fg−1 (1 Ag−1). When assembled into symmetric supercapacitor devices, the specific capacitance is calculated as 271 Fg−1 at 1 Ag−1, where the specific energy is achieved as high as 37.64 Wh kg−1 at a specific power of 500 W kg−1. Furthermore, the symmetric supercapacitor exhibited excellent cycling performance (∼94% ) after 4000 cycles. The incorporation of MoS2/MnO2 nanocomposite and conductive polymer within POAP/MoS2/MnO2 by simple synthesis route along with unique structure, which provides a new idea for the design of active components proportion. Therefore, the novel nanocomposite with excellent electrochemical performance has a great potential for higher energy storage devices.

Green synthesis of fish skeleton-like BaSO4 nanostructures by the ionic liquid designer template as nanofillers for supercapacitors application

Recent developments in supercapacitors (SCs) have seen a remarkable increase in the electrochemical performance of the devices, which has led to the production of high-performance supercapacitors. In this study, we synthesized ceramic BaSO4 nanostructure with fish skeleton-like morphology through monocationic ionic liquid (IL-BaSO4) by a hydrothermal method. Herein, IL-BaSO4 blended with a conductive polymer, Poly ortho amino phenol (IL-BaSO4/POAP), was used as an electrode in both three and two electrode systems. Synthesized material was characterized through Fourier transform infrared spectrometry (FT-IR), X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). For this purpose, IL-BaSO4/POAP as the electrochemical functionality of the given electrodes was evaluated by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS). The high specific capacitance of 624.3 F/g is obtained at a current density of 1 A/g for the IL-BaSO4/POAP in the electrochemical measurement of three electrodes. A high energy and power density symmetric supercapacitor was also successfully designed using IL-BaSO4/POAP as the anode and cathode electrodes in a 3 M KNO3 as the neutral electrolyte. The symmetrical supercapacitor (SSC) is capable of revolving in 0–1.3 V as a full potential window with a high energy density 35.4 W h/kg and power density of 650 W/kg for IL-BaSO4/POAP//IL-BaSO4/POAP. Besides, the SSC showed steady cycling ability for IL-BaSO4/POAP//IL-BaSO4/POAP retention capacity at 8 A/g following 3,000 cycles, with 94.7%.

Nanocomposite of p-type conductive polymer/iron (III) trimesic (Fe-BTC) metal–organic frameworks: synthesis, characterisation and pseudocapacitance performance

ABSTRACT In the present study, Fe(II)-based MOF (Fe-BTC, BTC = 1,3,5-benzentricarboxylate) was synthesised via a chemical method and then synthesised hybrid polyorthoaminophenol (POAP)/Fe-BTC films by electropolymerisation of POAP in the presence of Fe-BTC to serve as the active electrode for the electrochemical storage device. The characterisation of Fe-BTC and POAP/ Fe-BTC composite film has been investigated by surface and electrochemical analysis. Benefitting from the intrinsic synergetic contributions from structural/compositional merits, the electrode delivers an impressive capacity of 625 F g−1 at 0.005 mA. This article introduces new nanocomposite materials for electrochemical pseudocapacitor by taking advantage of simple synthesis, high active surface area and stability in an aqueous electrolyte.

Fabrication and optimization of poly(ortho-aminophenol) doped glycerol for efficient removal of cobalt ion from wastewater

Remediation of water pollution has been a crucial step in the environmental engineering processes. In the past decades, the adsorption technique was commonly used for the removal of heavy metals in water. Owing to the unique properties of polymer-based composites, a new nanocomposite, poly-ortho aminophenol and glycerol (P(oAP)/G), has attracted great attention in this field. Different parameters were studied to optimize the preparation of P(oAP)/G such as temperature, reaction time, and the concentration of monomer and initiator. As well as the structure of P(oAP)/G and chemical characterization was examined using various modalities. The fabricated nanocomposite had an urchin-like the shape of 3–5 μm in diameter, 16–18 nm in thickness of dendritic fibers, and a high surface area of 77.13 m2/g as well.Interestingly, the P(oAP)/G efficiency for Co2+ ions removal reached 96%, with an adsorption capacity of 117.9 mg/g, suggesting a higher capacity for water treatment. Further, cobalt ion adsorption followed the pseudo-second kinetic model and Temkin isotherm model. One can summarize that the P(oAP)/G is a good candidate for adsorption of metal ions which can be further studied on a large experimental scale in water purification processes.

Pseudocapacitive performance of surface functionalized halloysite nanotubes decorated green additive ionic liquid modified with ATP and POAP for efficient symmetric supercapacitors

Adenosine triphosphates (ATP) are excellent energy-carrying molecules due to their phosphate functional groups that link through phosphodiester bonds, while halloysite nanotubes (HNTs) are layered mineral materials which exist naturally and have a large number of active sites for energy storage reinforcement. The use of HNTs and ATP in combination will provide a new approach to producing advance electrode materials for energy storage devices. Herein, a simple and cost-effective chemical method is introduced to fabricate a composite electrode of functionalized halloysite nanotubes (FHA) loaded with a pyridinium-based ionic liquid (PyPS) and conductive polymer, poly ortho amino phenol (FHA-PyPS-POAP) for use in supercapacitor. The prepared FHA-PyPS-POAP electrode exhibited outstanding electrochemical behavior with a capacitance being up to 626 F g−1 at 1 A g−1 in a 1 M Na2SO4 electrolyte while preserving remarkable rate capability and indicating superior cycle stability. Besides, the FHA-PyPS-POAP electrodes employed in the two-electrode system with a capacitance of 306 F g−1 at 0.5 A g−1 and possessed an energy density of 20.8 W h kg−1 at 350 W kg−1. Also, the symmetrical supercapacitor shows capacitance retention remaining 93.9% for FHA-PyPS-POAP//FHA-PyPS-POAP at 8 A g−1 over 5000 cycles. Thus, these promising findings demonstrated a high potential as a significant application in developing energy storage devices with enhanced energy and power concentrations.

Superior rate capability and cyclic stability of poly orthoaminophenol nanocomposite film in the presence of benzidine functionalized graphene oxide

AbstractIn this study, benzidine (BnZ) is used not only as a reducing agent but also as the spacer on the supercapacitive behavior of the synthesized graphene nanocomposite film. The synthesized graphene nanocomposite was examined by crystalline size, structural morphology, presence of functional groups to X‐ray diffraction, scanning electron microscope, and Fourier transform infrared spectroscopy. Furthermore, chemical composition moieties are evidenced by X‐ray photoelectron spectroscopy. Poly ortho aminophenol as a p‐type conductive polymer was introduced into the channels of Bnz‐rGOAerogel. This composite structure with a high surface area and pore volume can effectively play a synergistic role between the two materials, thus improving its overall performance. In addition, the specific capacitance of the prepared spherical composite electrode is as high as 625 F/g at 1.0 A/g current density, and the retention rate of the initial capacity is 89% after 3,000 cycles in acidic solution, which has good cycle stability.

Lignin-derived carbon as a high efficient active material for enhancing pseudocapacitance performance of p-type conductive polymer

As first research work, lignin derived carbon (LDC) was chemically synthesized, then studied its effects on the supercapacitive properties of the POAP/ LDC composite, as an active martial, and then characterized by FE-SEM and BET methods. For significantly increasing the volumetric capacitance and achieving a synergistic effect, poly ortho aminophenol (POAP) was injected into the channels of LDC. POAP could be uniformly dispersed within the channels due to their high pore volume and surface area. Moreover, in addition to active pseudocapacitive function and facilitating energy storage, POAP could act as a proton transport media and promoter of protonation/deprotonation processes during the redox reactions in the channels. The values of 485 F/g at 1.0 A/g current density and 86% (as a good cycle stability) after 3000 cycles are obtained as the specific capacitance (Cs) and the retention rate of the initial capacity.

Influence of nanostructured VO-acetylacetonate coordination system with 2-(pyridin-4-ylmethylene) hydrazine-1-carbothioamide in pseudocapacitance performance of p-type conductive polymer composite film

ABSTRACT In this work, first, VO-acetylacetonate coordination system with 2-(pyridin-4-ylmethylene) hydrazine-1-carbothioamide (VO(acac)2L) was synthesised via sonochemical routes. Then POAP/VO(acac)2L films were fabricated through electropolymerization of poly ortho aminophenol (POAP) in the presence of VO(acac)2L and used as the active electrode of an electrochemical supercapacitor (SC) with a significant electrochemical properties improvement. X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) was applied to characterise the structural state of the prepared samples. Also, some electrochemical methods such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge–discharge (GCD) were carried out for the system performance investigation. This work may open an avenue to develop efficient and robust nanocomposite materials for an energy storage device in an acidic medium.

Electrochemical performance of Silsesquioxane-GO loaded with alkoxy substituted ammonium-based ionic liquid and POAP for supercapacitor

Recently, the electrochemical efficiency of supercapacitors has experienced a dramatic rise, followed by a rapid developing rate on introducing promising electrode material, led to manufacture highly performance supercapacitors. In this work we synthesized Silsesquioxane -containing graphene oxide (SSQ-GO) and alkoxy substituted ammonium-based ionic liquid, (Tris[2-(2-methoxy ethoxy) ethyl]methyl ammonium Iodide (TMEMAI)) blended with conductive polymer, Poly ortho amino phenol (SSQ-GO- TMEMAI-POAP) used as an electrode in both three and two-electrode systems. The prepared material characterized by XPS, XRD, TEM, SEM, EDX, techniques and the attributed electrochemical tests carried out by cyclic voltammetry, chronopotentiometry techniques. The incorporating of TMEMAI into GO surface with porous structure in the presence of conductive polymer exhibited high conductivity and decreased resistance through the efficient electron channels based on electrochemical impedance spectroscopy test. The specific capacitance and energy density of SSQ-GO-TMEMAI-POAP were significantly improved, while retention capacity obtained ∼96% within 3000 charge-discharge cycles, with high durability. Concerning the two-electrode design, the specific capacitance calculated as 450 F g−1 at 0.5 A g−1, where the energy density at power density achieved of 22.5 W h kg−1, 300 W kg−1, respectively. The incorporation of ionic liquid and conductive polymer within SSQ-GO-TMEMAI-POAP nanocomposite indicated high electrochemical potential where used in energy storage devices.

Influence of synthesized functionalized reduced graphene oxide aerogel with 4,4′-methylenedianiline as reducing agent on electrochemical and pseudocapacitance performance of poly orthoaminophenol electroactive film

In this work, firstly, reduced graphene oxide aerogel (F-rGO Aerogel) were synthesized via chemical routes. Here, we decide to report the first research work for studying the effect of 4,4′-methylenedianiline as reducing agent on the supercapacitive behavior of the prepared graphene aerogels. The structural and valance state of the prepared samples were characterized by FT-IR, Raman, X-ray photoelectron spectroscopy (XPS), BET, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Then, poly ortho aminophenol (POAP) was introduced into the channels of F-rGO Aerogel to achieve a synergistic effect and significantly increase the volumetric capacitance. F-rGO Aerogel with a high surface area and pore volume allowed the uniform dispersion of POAP within their channels in nanoscale dimensions Moreover, POAP could function not only as an active pseudocapacitive material that facilitated energy storage but also as a proton transport media that promoted a rapid protonation/deprotonation process during the redox reaction in the internal channels. As a result, POAP/F-rGO composites, even with a poor pore structure, delivered a high specific capacitance of 8100 mF.cm−2 at 5 mA.cm−2 and an excellent rate performance of 87% at current densities ranging from 1.0 to 10 mA.cm−2. In addition, POAP/ F-rGO Aerogel composites exhibited good cycling stability, retaining 88% of the capacitance after 1000 charge/discharge cycles at 5 mA.cm−2, owing to the high mechanical strength of the F-rGO Aerogel. Therefore, this synthesis strategy could provide an efficient and scalable solution for the development of supercapacitor electrode materials.

Pseudocapacitive efficiency of covalently Cr-complex with L-histidine-methyl ester as a ligand graphene oxide blended with conducting polymer (POAP) as electrode material in supercapacitor

The structure of electrode materials is still a critical challenge to improve the electrochemical features toward widespread application of supercapacitors. Functionalized graphene oxide and their derivatives or composites can synergically increase the electrochemical performance. In this work we synthesized graphene oxide (GO) through Hummer's method and then GO was functionalized by L-histidine-methyl ester dihydrochloride (L-HMEC) in the presence of an ionic liquid (1-buthyl-3-methyl-imidazolium bromide). The obtained product was further reacted with triethyl amine (Et3N) and CrCl3 to host a Cr-containing molecule grafted covalently on the GO surface (Cr-GO). The fractal concept showed a porous structure based on log-log scale plotting of potential at current density. Additionally, the Cr-GO composited electro-synthetically with poly ortho amino phenol (POAP) as a conductive polymer, and then employed as an efficient porous electrode material in a two-electrode setting (Cr-GO-POAP). The employed Cr-GO-POAP improved the supercapacitive behavior with enhancing conductivity and facilitating electron movements in electrolyte with specific capacitance of 354 F g−1 at 0.5 A g−1 and obvious wider CV curves. Cyclic voltammetry and EIS techniques showed high-efficient performance in electron conducting with excellent durability and cycle life (~94%) after 5000 cycles. Both energy and power densities were improved by 12.29 W h kg−1 and 250 W kg−1, respectively.

Combination of magnetic solid‐phase extraction with dispersive liquid–liquid microextraction followed by GC‐MS for trace analysis of synthetic cannabinoids in plasma samples

In this work, an efficient extraction method based on a combination of magnetic solid-phase extraction (MSPE) and dispersive liquid–liquid microextraction (DLLME) followed by GC-MS was developed for the determination of 5F-ADB-PINACA (ADB) and AB-FUBINACA (AB). Fe3O4 nanoparticles coated with poly ortho-aminophenol were synthesised and applied as the sorbent. Extraction parameters including pH in both the MSPE (pH 3.5) and DLLME (pH 11) steps, sorbent amount (20 mg), salt effect (10%, w/v), adsorption (20 min) and desorption time (5 min), type and volume of eluent (1.0 ml of acetone) and extraction solvent (25 µl of toluene), were optimised. Enrichment factors of 213 and 437 obtained for ADB and AB, respectively. The linear ranges of the method were obtained 0.2–50 and 0.2–50 ng ml−1 for ADB and AB, respectively. Regression coefficients above 0.998 and LODs of 0.01 and 0.005 ng ml−1 resulted. The intra- and inter-day RSDs% (n = 3) were found to be 8.3 and 7.6%, respectively. Finally, MSPE-DLLME-GC/MS was applied for the determination of analytes in plasma samples. Recoveries were within the range of 87.6–102.6 and 89.4–104% for the ADB and AB, respectively, indicating the suitability of the proposed method for analysis of ADB and AB in complicated matrices.

Electrosynthesis of high-purity TbMn2O5 nanoparticles and its nanocomposite with conjugated polymer: Surface, density of state and electrochemical investigation

Herein, high-purity TbMn2O5 nanostructure has been synthesized by the electrochemical technique. Different mechanical properties such as particle size, texture coefficient and lattice constant, were obtained by Nelson-Riley functions, Scherrer's equation, Williamson-Hall methods and compared with computational and XRD data. The projector augmented-wave method (PAW) directly from the Kohn-Sham density functional was used to carry out all post-processing calculations including band structure and density of state (DOS) estimations along with the band gap. Then, hybrid Poly ortho aminophenol (POAP)/TbMn2O5 films, acting as active materials in energy storage device, were prepared through POAP electropolymerization in the presence of TbMn2O5 nanoparticles in order to enhance the electrochemical performance of the POAP film. In addition, POAP/TbMn2O5 composites exhibited good cycling stability, retaining 89% of the capacitance after 1000 charge/discharge cycles, owing to the high mechanical strength of the TbMn2O5.

Ternary nanocomposite of conductive polymer/chitosan biopolymer/metal organic framework: Synthesis, characterization and electrochemical performance as effective electrode materials in pseudocapacitors

In this work, firstly, [Zn2(bdc)2(dabco)]n as a metal organic framework (MOF) was synthesized via chemical routes. Finally, for improving electrochemical properties of the poly ortho aminophenol (POAP), we fabricated POAP/chitosan/MOF-1 films by electro- polymerization of POAP in the presence of Chitosan/MOF-1 to serve as the active electrode for electrochemical supercapacitor. The structural and valance state of the prepared samples was characterized by X-ray diffraction (XRD), and field emission scanning electron microscopy (FESEM). Different electrochemical methods including galvanostatic charge–discharge experiments, cyclic voltammetry and electrochemical impedance spectroscopy are carried out in order to investigate the performance of the system. This work introduces new most efficient materials for electrochemical redox capacitors with advantages including ease synthesis, high active surface area and stability in an aqueous electrolyte.

Electrophoretic as New Method for Deposition of Polyaniline Derivatives Nanostructure Coatings

In this research, at the commencement, polyaniline (PANi), polyorthoanisidine (PoAnis), polyorthotoluidine (PoTol), and polyorthoamino phenol (PoAP) were synthesized through a chemical polymerization process. Subsequently, the nanostructured coatings of these polymers were electrodeposited on a stainless steel 304 substrate through an electrophoresis method in a solution containing emeraldine salt in multiple solvents (as a colloidal suspension) and aluminum nitrate (as a charging agent). The scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) were employed to assess the structure and determine the synthesized polymer morphology. The SEM images clearly indicated that the particle sizes of all the polymers were less than 100 nm. In electrophoresis approach, voltage, time and the type of solvent are the effective factors and components on the film quality. Henceforward, we commenced studying how these factors can affect the coating of nanostructured polyaniline and its derivatives. The optimum voltage, process time, and solvent amount required for the formation of each nanostructured polymeric coating were obtained as 25 V, 12 min, and ethanol for PANi, 5 V and 8–10 min for PoAP, 30 V and 25 min for PoTol, 37 V and 20 min for PoAnis, respectively.

Synthesis and electrochemical capacitor characterization of new copolyimides containing thiazole ring and their composites with conductive polymer

In this research work, copolyimides (PIa,b) were synthesized by chemical routs. We used perylene-3,4,9,10-tetracarboxylic dianhydride and synthesized diamines (DAa,b) containing thiazole ring as monomers to obtain PIa,b which were characterized by 1HNMR and FTIR spectroscopies. We prepared POAP/PIa and POAP/PIb by depositing poly ortho amino phenol (POAP) as conductive polymer on the surface of PIa,b via in situ electropolymerization. To evaluate the effect of the PIa,b in terms of the electrochemical performance of composites, we used galvanostatic charge/discharge, cyclic voltammetry, and electrochemical impedance spectroscopy. The specific capacitance of 207.2 and 322.4 F/g are obtained for POAP/PIa and POAP/PIb, respectively. All these evidences prove that POAP/PI composites have long cycle life as well as high specific capacitance, which are indicative for being a good candidate in terms of application in supercapacitors.