Synergistic effect of heat treatments and KOH activation enhances the electrochemistry performance of polypyrrole nanochains (PPy-NCs)

Shehnaz,; Wu, De Pei; Guo, Yanan; Song, Xuedan; Yang, Ying; Mao, Qing; Ren, Shan; Hao, Ce

doi:10.1016/j.electacta.2018.01.128

Cited by 13 publications

(8 citation statements)

References 61 publications

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“…In addition to the several nanostructures mentioned above, researchers continue to prepare PPy nanomaterials with new shapes [ 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 ]. Liu et al [ 95 ] synthesized 2-D PPy nanoclips with diameters ranging from 50 to 70 nm using an oxidative template consisting of cetrimonium cations and peroxydisulfate anions.…”

Section: Types Of Ppy Nanomaterialsmentioning

confidence: 99%

“…In the field of supercapacitors, CP-based supercapacitors have received increasing attention due to their large specific electric capacity. However, they have poor stability, and researchers have attempted unremittingly to enhance the electrical performance and stability of PPy-based supercapacitors [ 61 , 82 , 97 , 100 , 115 , 117 , 147 , 148 , 149 , 150 , 151 , 152 , 153 , 154 , 155 , 156 , 157 , 158 , 159 ] (see Table 3 ). Santino et al [ 155 ] coated a high-aspect ratio bristle-like nano-PPy continuous network on a graphitic hard carbon paper current collector through a modified gas phase polymerization.…”

Section: Application Of Ppy Nanomaterialsmentioning

confidence: 99%

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Polypyrrole Nanomaterials: Structure, Preparation and Application

et al. 2022

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In the past decade, nanostructured polypyrrole (PPy) has been widely studied because of its many specific properties, which have obvious advantages over bulk-structured PPy. This review outlines the main structures, preparation methods, physicochemical properties, potential applications, and future prospects of PPy nanomaterials. The preparation approaches include the soft micellar template method, hard physical template method and templateless method. Due to their excellent electrical conductivity, biocompatibility, environmental stability and reversible redox properties, PPy nanomaterials have potential applications in the fields of energy storage, biomedicine, sensors, adsorption and impurity removal, electromagnetic shielding, and corrosion resistant. Finally, the current difficulties and future opportunities in this research area are discussed.

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Section: Types Of Ppy Nanomaterialsmentioning

confidence: 99%

Section: Application Of Ppy Nanomaterialsmentioning

confidence: 99%

Polypyrrole Nanomaterials: Structure, Preparation and Application

et al. 2022

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“…Without the presence of metallic centers, Shehnaz et al [ 528 ] synthesized PPy nanochains by in situ chemical polymerization under the presence of CTAB and SDS surfactants and with final stages of activation by KOH and pyrolysis at 500–800 °C. The nanochains denoted as PPy-NCs-KOH-T (with T = 500, 600, 700, or 800 °C) were evaluated as supercapacitor electrodes, although in this part, only their electrocatalytic activity for ORR is of interest.…”

Section: Nanostructured Cp Used In Fuel Cellsmentioning

confidence: 99%

“…The nanochains denoted as PPy-NCs-KOH-T (with T = 500, 600, 700, or 800 °C) were evaluated as supercapacitor electrodes, although in this part, only their electrocatalytic activity for ORR is of interest. For the formation of nanochains, the high concentration of surfactants was essential because, at lower concentrations, only disaggregated spheres were obtained [ 528 ]. In addition, the activation by KOH allowed increasing in the porosity and the surface area of the electrocatalyst, which ultimately optimized the number of active sites and ionic diffusion.…”

Section: Nanostructured Cp Used In Fuel Cellsmentioning

confidence: 99%

Nanostructured Conducting Polymers and Their Applications in Energy Storage Devices

et al. 2023

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Due to the energy requirements for various human activities, and the need for a substantial change in the energy matrix, it is important to research and design new materials that allow the availability of appropriate technologies. In this sense, together with proposals that advocate a reduction in the conversion, storage, and feeding of clean energies, such as fuel cells and electrochemical capacitors energy consumption, there is an approach that is based on the development of better applications for and batteries. An alternative to commonly used inorganic materials is conducting polymers (CP). Strategies based on the formation of composite materials and nanostructures allow outstanding performances in electrochemical energy storage devices such as those mentioned. Particularly, the nanostructuring of CP stands out because, in the last two decades, there has been an important evolution in the design of various types of nanostructures, with a strong focus on their synergistic combination with other types of materials. This bibliographic compilation reviews state of the art in this area, with a special focus on how nanostructured CP would contribute to the search for new materials for the development of energy storage devices, based mainly on the morphology they present and on their versatility to be combined with other materials, which allows notable improvements in aspects such as reduction in ionic diffusion trajectories and electronic transport, optimization of spaces for ion penetration, a greater number of electrochemically active sites and better stability in charge/discharge cycles.

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“…The most conventional method involves activation by soaking pre-carbonized materials into KOH solution or with a mixture of KOH and other activation agents. Solution concentration, mixture ratio, activation time, and activation temperature are the effective parameters that control the final physical properties of the carbon electrodes (He et al 2016 ; Shehnaz et al 2018 ; Zubbri et al 2021 ). Others have utilized less common approach to active their samples using KOH as the activation agent.…”

Section: Preparation and Properties Of Nanostructured Bio-based Carbon Materialsmentioning

confidence: 99%

High-performance nanostructured bio-based carbon electrodes for energy storage applications

Yanılmaz

2021

Cellulose

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Graphic abstract Polyacrylonitrile (PAN)-based carbon precursor is a well-established and researched material for electrodes in energy storage applications due to its good physical properties and excellent electrochemical performance. However, in the fight of preserving the environment and pioneering renewable energy sources, environmentally sustainable carbon precursors with superior electrochemical performance are needed. Therefore, bio-based materials are excellent candidates to replace PAN as a carbon precursor. Depending on the design requirement (e.g. carbon morphology, doping level, specific surface area, pore size and volume, and electrochemical performance), the appropriate selection of carbon precursors can be made from a variety of biomass and biowaste materials. This review provides a summary and discussion on the preparation and characterization of the emerging and recent bio-based carbon precursors that can be used as electrodes in energy storage applications. The review is outlined based on the morphology of nanostructures and the precursor’s type. Furthermore, the review discusses and summarizes the excellent electrochemical performance of these recent carbon precursors in storage energy applications. Finally, a summary and outlook are also given. All this together portrays the promising role of bio-based carbon electrodes in energy storage applications.

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Synergistic effect of heat treatments and KOH activation enhances the electrochemistry performance of polypyrrole nanochains (PPy-NCs)

Cited by 13 publications

References 61 publications

Polypyrrole Nanomaterials: Structure, Preparation and Application

Polypyrrole Nanomaterials: Structure, Preparation and Application

Nanostructured Conducting Polymers and Their Applications in Energy Storage Devices

High-performance nanostructured bio-based carbon electrodes for energy storage applications

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