Carbon Nanotube Film Electrodes with Acrylic Additives: Blocking Electrochemical Charge Transfer Reactions

Ansón‐Casaos, Alejandro; Sanahuja‐Parejo, Olga; Hernández‐Ferrer, Javier; Benito, Ana M.; Maser, Wolfgang K.

doi:10.3390/nano10061078

Cited by 10 publications

(10 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this regard, the formation of percolative paths at low filler loading with 1D/2D nanostructures may be preferred compared to spherically-shaped nanofillers or larger fillers [25]. There are some reports about the formation of segregated percolative paths inside the polymer composite [26][27][28][29][30], or conductive inks and coatings [31,32], but the spatial control of the electrical properties in these systems is still an open issue for practical applications. In this report, the application in the area of the laser stimulated percolation of CNT/polymer composites for low-power electronics is discussed.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Conductive Paths Obtained by Laser Processing of Non-Conductive Carbon Nanotube/Polypropylene Composites

et al. 2021

View full text Add to dashboard Cite

Functional materials are promising candidates for application in structural health monitoring/self-healing composites, wearable systems (smart textiles), robotics, and next-generation electronics. Any improvement in these topics would be of great relevance to industry, environment, and global needs for energy sustainability. Taking into consideration all these aspects, low-cost fabrication of electrical functionalities on the outer surface of carbon-nanotube/polypropylene composites is presented in this paper. Electrical-responsive regions and conductive tracks, made of an accumulation layer of carbon nanotubes without the use of metals, have been obtained by the laser irradiation process, leading to confined polymer melting/vaporization with consequent local increase of the nanotube concentration over the electrical percolation threshold. Interestingly, by combining different investigation methods, including thermogravimetric analyses (TGA), X-ray diffraction (XRD) measurements, scanning electron and atomic force microscopies (SEM, AFM), and Raman spectroscopy, the electrical properties of multi-walled carbon nanotube/polypropylene (MWCNT/PP) composites have been elucidated to unfold their potentials under static and dynamic conditions. More interestingly, prototypes made of simple components and electronic circuits (resistor, touch-sensitive devices), where conventional components have been substituted by the carbon nanotube networks, are shown. The results contribute to enabling the direct integration of carbon conductive paths in conventional electronics and next-generation platforms for low-power electronics, sensors, and devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Multifunctional Conductive Paths Obtained by Laser Processing of Non-Conductive Carbon Nanotube/Polypropylene Composites

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Our results suggest that similar nanocomposite electrodes might For comparison, the graphene contents were converted to be based on the solid components. [28]…”

Section: Discussionmentioning

confidence: 99%

Fabrication and Characterization of Metal‐Free Composite Electrodes Based on Few‐Layer‐Graphene Nanoplatelets for Oxygen Reduction Reaction Applications

Suppan

Briones-Macías

Pazmiño-Arias

et al. 2021

Physica Status Solidi (b)

View full text Add to dashboard Cite

Innovative technologies such as fuel and solar cells, supercapacitors, batteries, sensors, electrochemical energy storage devices are some of the most studied solutions to future energy demands due to an exponential population increase, estimated to reach over nine billion by 2050. [1] In fuel cells, chemical energy is directly converted to electricity. This fact is the main driving force through high-performance electrodes with improved catalytic activities toward hydrogen oxidation reaction (HOR) or oxygen reduction reaction (ORR). The final performance of a microbial fuel cell (MFC) will depend on the following parameters: 1) the power at the output, 2) the current density, and 3) the Coulombic efficiency, [1,2] which in turn depend on several factors such as the conductivity and porosity of the anode, the type of proton exchange membrane used to separate the cell chambers, the type of organic substrate used in the oxidation reaction at the anode, as well as the ORR at the cathode. However, the cathodic ORR in many cases has proven to be a limiting factor in the total energy generation in the cells, hence considered as one of the greatest performance indicators of a microbial fuel cell. [2] The commercial Pt/C catalyst is the common reference because of its great performance towards ORR with a limiting current density around 6 mA cm À2 at 0.7 V versus RHE (reversible hydrogen electrode) and 1600 rpm. Catalysts such as phosphorus doped hierarchical porous carbon showed a shift of around 70 mV for the onset potential compared with the Pt/C electrode. [3] Carbon fiber paper with Pt 3 Co showing a limiting current density of 25.8 mA cm À2 at 0.2 V versus RHE and 2500 rpm [4] and nanocomposites based on hybrid Mn 3 O 4 and oxidized graphene flakes provide a limiting current density of 2.8 mA cm À2 at À0.6 V and 1600 rpm. [5,6] Despite being the material with the highest electrocatalytic activity for ORR reported so far, Pt presents certain disadvantages like its high cost, toxicity, chemical instability, and biofouling, which still limit a widespread application. [7,8] These are the principal driving forces to find affordable materials to compete with Pt for ORR. Other metals such as copper, cobalt, or iron have been also reported as good candidates to replace the expensive Pt electrodes. Those materials exhibited currents, durability, and tolerance comparable with Pt, however, their ecological impact is highly

show abstract

“…An in-line 4-point probe configuration with equidistant probe separations of 2.24 mm was utilized, with controlled and homogeneous pressure over the conductive film. For the resistivity measurement, the geometry of the film and the distance between the electrodes were taken into account [18].…”

Section: Film Preparation and Characterizationmentioning

confidence: 99%

“…These are very polluting solvents, with a boiling point of >170 • C, posing a serious risk of toxicity in humans. However, the use of water does not automatically solve these problems either, since it requires the incorporation of high concentrations of surfactants and other additives [9,17,18], indefinitely remaining in the ink, possibly leading to environmental and toxicity problems. Thus, new methods compatible with lower boiling point solvents (such as water or alcohols), together with non-toxic dispersants, are in demand in order to attain a truly environmentally friendly LPP, without raising the manufacturing cost or jeopardizing the overall electric/optoelectronic device performance once the deposition method takes place.…”

Section: Introductionmentioning

confidence: 99%

Waterborne Graphene- and Nanocellulose-Based Inks for Functional Conductive Films and 3D Structures

et al. 2021

Self Cite

View full text Add to dashboard Cite

In the vast field of conductive inks, graphene-based nanomaterials, including chemical derivatives such as graphene oxide as well as carbon nanotubes, offer important advantages as per their excellent physical properties. However, inks filled with carbon nanostructures are usually based on toxic and contaminating organic solvents or surfactants, posing serious health and environmental risks. Water is the most desirable medium for any envisioned application, thus, in this context, nanocellulose, an emerging nanomaterial, enables the dispersion of carbon nanomaterials in aqueous media within a sustainable and environmentally friendly scenario. In this work, we present the development of water-based inks made of a ternary system (graphene oxide, carbon nanotubes and nanocellulose) employing an autoclave method. Upon controlling the experimental variables, low-viscosity inks, high-viscosity pastes or self-standing hydrogels can be obtained in a tailored way. The resulting inks and pastes are further processed by spray- or rod-coating technologies into conductive films, and the hydrogels can be turned into aerogels by freeze-drying. The film properties, with respect to electrical surface resistance, surface morphology and robustness, present favorable opportunities as metal-free conductive layers in liquid-phase processed electronic device structures.

show abstract

Carbon Nanotube Film Electrodes with Acrylic Additives: Blocking Electrochemical Charge Transfer Reactions

Cited by 10 publications

References 45 publications

Multifunctional Conductive Paths Obtained by Laser Processing of Non-Conductive Carbon Nanotube/Polypropylene Composites

Multifunctional Conductive Paths Obtained by Laser Processing of Non-Conductive Carbon Nanotube/Polypropylene Composites

Fabrication and Characterization of Metal‐Free Composite Electrodes Based on Few‐Layer‐Graphene Nanoplatelets for Oxygen Reduction Reaction Applications

Waterborne Graphene- and Nanocellulose-Based Inks for Functional Conductive Films and 3D Structures

Contact Info

Product

Resources

About