Carbon nanofiber and PEDOT-PSS bilayer systems as electrodes for symmetric and asymmetric electrochemical capacitor cells

Gallegos, Ana Karina Cuentas; Rincón, Marina E.

doi:10.1016/j.jpowsour.2006.06.085

Cited by 77 publications

(19 citation statements)

References 11 publications

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“…When solar cells, windmills, or hydroelectric turbines are considered as the best available sources of alternative energies, transmittance of energy and, more importantly, storage systems such as supercapacitors and batteries have to be taken into account. [4] High power density is also required to achieve enough acceleration whenever required at the start or on a slope. Hydroelectric power plants, windmills, and even, for better sunlight, solar cell panels are located in remote areas, which require the use of immediate storage systems.…”

Section: Introductionmentioning

confidence: 99%

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Carbon‐Based Electrochemical Capacitors

2012

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Supercapacitors are one of the key devices for energy-storage applications. They have energy densities much higher than those of conventional capacitors and possess much better power delivery capabilities than batteries. This makes them unique devices that can outperform both batteries and conventional capacitors under special circumstances. Nanocarbons are the main electrode materials for supercapacitors. Abundant sources of nanocarbons and facile processes of modification have led to the fabrication of cheap electrodes. In this review, we focus on the capacitance performance of highly porous activated carbons and attempt to determine the role of different pores. Elaborate discussions are presented on individual contributions from micro- and mesopores and their mutual dependence. This article also presents a comparative performance report for both random and ordered porous nanocarbons. Novel carbon materials, such as carbon nanotubes and graphene, and their contributions in this context are discussed. We summarize key techniques for the functionalization of nanocarbons and their pseudocapacitive charge-storage mechanisms. Nanocarbon composites with redox-active transition-metal oxides and conducting polymers are highlighted along with their impact as electrode materials. Ideal composite structures are highlighted and an attempt is made to determine an ideal future electrode structure for capacitors with high energy and power density.

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Section: Introductionmentioning

confidence: 99%

“…For instance, in the case of electric cars, energy-storage devices with high energy densities are required for long-distance travel. [4] High power density is also required to achieve enough acceleration whenever required at the start or on a slope.…”

Section: Introductionmentioning

confidence: 99%

Carbon‐Based Electrochemical Capacitors

2012

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“…Other materials. This group of materials also belongs to conductive polymers like PANI (Fan et al, 2007;Meng et al, 2014;, PPy, PEDOT, and poly (styrene sulfonate) PEDOT-PSS (Cuentas Gallegos and Rincón, 2006). The 3D material is produced by the self-assembly of smallsized nanostructures (Cuentas Gallegos and Rincón, 2006;.…”

Section: Metal Oxidesmentioning

confidence: 99%

“…This group of materials also belongs to conductive polymers like PANI (Fan et al, 2007;Meng et al, 2014;, PPy, PEDOT, and poly (styrene sulfonate) PEDOT-PSS (Cuentas Gallegos and Rincón, 2006). The 3D material is produced by the self-assembly of smallsized nanostructures (Cuentas Gallegos and Rincón, 2006;. Typical preparation methods are mainly divided into electrochemical polymerization (Fan et al, 2007;Meng et al, 2014; and direct chemical polymerization (Cuentas Gallegos and Rincón, 2006;Antiohos et al, 2011).…”

Section: Metal Oxidesmentioning

confidence: 99%

Three-Dimensional Architectures in Electrochemical Capacitor Applications – Insights, Opinions, and Perspectives

et al. 2020

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This review focuses on describing the current state-of-the-art research in the synthesis of 3D architectures for electrochemical capacitor applications. The selection is based on both template and non-template strategies. Particular attention has been paid to carbon materials because of their structural interconnection, as they create not only the desired hierarchical porous channels but also ensure high conductivity and mechanical stability. A comprehensive overview of electrode materials is presented here with a detailed discussion of composite solutions, including their advantages and disadvantages. Numerous examples from the literature are presented for individual solutions. The future challenges posed for this type of material are finally summarized.

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“…Typically, supercapacitors exhibit 20-200 times larger capacitance per unit of mass or volume than conventional capacitors. Depending on the charge-storage mechanism there are electrical double-layer capacitors (EDLC), mainly based on carbon materials [1,2] which storage the energy through ions accumulation at the electrode/electrolyte interface. In addition, pseudocapacitors, relayed on transition-metal oxides and conducting polymers, which store the energy through faradic reactions on the electrode surface in the appropriate potential window.…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis and Electrophoretic Deposition of NiO/Ni Core-Shell Nanoparticles and Its Application as Pseudocapacitor

et al. 2017

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A simple, low cost and transferable colloidal processing method and the subsequent heat treatment has been optimized to prepare binder-free electrodes for their application in supercapacitors. NiO/Ni core-shell hybrid nanostructures have been synthetized by heterogeneous precipitation of metallic Ni nanospheres onto NiO nanoplatelets as seed surfaces. The electrophoretic deposition (EPD) has been used to shape the electroactive material onto 3D substrates such as Ni foams. The method has allowed us to control the growth and the homogeneity of the NiO/Ni coatings. The presence of metallic Nickel in the microstructure and the optimization of the thermal treatment have brought several improvements in the electrochemical response due to the connectivity of the final microstructure. The highest specific capacitance value has been obtained using a thermal treatment of 325 • C during 1 h in Argon. At this temperature, necks formed among ceramic-metallic nanoparticles preserve the structural integrity of the microstructure avoiding the employment of binders to enhance their connectivity. Thus, a compromise between porosity and connectivity should be established to improve electrochemical performance.

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Carbon nanofiber and PEDOT-PSS bilayer systems as electrodes for symmetric and asymmetric electrochemical capacitor cells

Cited by 77 publications

References 11 publications

Carbon‐Based Electrochemical Capacitors

Carbon‐Based Electrochemical Capacitors

Three-Dimensional Architectures in Electrochemical Capacitor Applications – Insights, Opinions, and Perspectives

In Situ Synthesis and Electrophoretic Deposition of NiO/Ni Core-Shell Nanoparticles and Its Application as Pseudocapacitor

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