Recent Progress on Electrochemical Capacitors Based on Carbon Nanotubes

Grądzka, Emilia; Winkler, Krzysztof

doi:10.5772/intechopen.71687

Cited by 8 publications

(3 citation statements)

References 177 publications

(223 reference statements)

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“…The values of capacitance obtained as the slope capacitive current vs. scan rate were 320, 770 and 1420 µF cm −2 for, 6-, 12-( Supplementary Information Figure S4 ), and 18-layer SWCNT printed electrodes, respectively. The obtained average value of specific capacitance of these SWCNT electrodes was 2.6 F g −1 , in accordance with previous reports stating typical values range from 2 to 45 F g −1 [ 37 ].…”

Section: Resultssupporting

confidence: 91%

Fully Inkjet-Printed Biosensors Fabricated with a Highly Stable Ink Based on Carbon Nanotubes and Enzyme-Functionalized Nanoparticles

et al. 2021

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Enzyme inks can be inkjet printed to fabricate enzymatic biosensors. However, inks containing enzymes present a low shelf life because enzymes in suspension rapidly lose their catalytic activity. Other major problems of printing these inks are the non-specific adsorption of enzymes onto the chamber walls and stability loss during printing as a result of thermal and/or mechanical stress. It is well known that the catalytic activity can be preserved for significantly longer periods of time and to harsher operational conditions when enzymes are immobilized onto adequate surfaces. Therefore, in this work, horseradish peroxidase was covalently immobilized onto silica nanoparticles. Then, the nanoparticles were mixed into an aqueous ink containing single walled carbon nanotubes. Electrodes printed with this specially formulated ink were characterized, and enzyme electrodes were printed. To test the performance of the enzyme electrodes, a complete amperometric hydrogen peroxide biosensor was fabricated by inkjet printing. The electrochemical response of the printed electrodes was evaluated by cyclic voltammetry in solutions containing redox species, such as hexacyanoferrate (III/II) ions or hydroquinone. The response of the enzyme electrodes was studied for the amperometric determination of hydrogen peroxide. Three months after the ink preparation, the printed enzyme electrodes were found to still exhibit similar sensitivity, demonstrating that catalytic activity is preserved in the proposed ink. Thus, enzyme electrodes can be successfully printed employing highly stable formulation using nanoparticles as carriers.

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Section: Resultssupporting

confidence: 91%

Fully Inkjet-Printed Biosensors Fabricated with a Highly Stable Ink Based on Carbon Nanotubes and Enzyme-Functionalized Nanoparticles

et al. 2021

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“…Carbon nanotubes (CNT) due to their high electrical conductivity (5 × 10 5 S/m [ 47 ]), mechanical strength, and relatively high specific surface area (the theoretical value of this parameter can reach 1315 m 2 /g for single-walled CNTs [ 48 ]) are also of considerable interest in the context of electrode materials for supercapacitors. It is reported [ 49 ] that the specific capacitance of electrodes based on unmodified single- and multi-walled CNT does not exceed 45 and 80 F/g, respectively. In order to achieve more impressive functional characteristics (specific capacitance, energy density, and charge/discharge rate), strategies such as functionalization of CNT with various conductive materials (graphene, metal nanoparticles, transition metal oxides, MXenes) as well as their deposition on thin metallic films are employed [ 50 ].…”

Section: The Most Common Electrode Components Of Printed Micro-superc...mentioning

confidence: 99%

Current Trends and Promising Electrode Materials in Micro-Supercapacitor Printing

Simonenko,

Gorobtsov

et al. 2023

Materials

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The development of scientific and technological foundations for the creation of high-performance energy storage devices is becoming increasingly important due to the rapid development of microelectronics, including flexible and wearable microelectronics. Supercapacitors are indispensable devices for the power supply of systems requiring high power, high charging-discharging rates, cyclic stability, and long service life and a wide range of operating temperatures (from −40 to 70 °C). The use of printing technologies gives an opportunity to move the production of such devices to a new level due to the possibility of the automated formation of micro-supercapacitors (including flexible, stretchable, wearable) with the required type of geometric implementation, to reduce time and labour costs for their creation, and to expand the prospects of their commercialization and widespread use. Within the framework of this review, we have focused on the consideration of the key commonly used supercapacitor electrode materials and highlighted examples of their successful printing in the process of assembling miniature energy storage devices.

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“…Carbon nanostructures, such as singleand multi-walled carbon nanotubes and graphene, exhibit excellent mechanical, thermal, structural and electrical properties. [33][34][35][36][37] In this work, the preparation procedure of composites based on nanostructured polyazulene and different carbon nanostructures, such as single-or multi-walled carbon nanotubes and single-layer graphene oxide, and a comparison of their electrochemical properties are presented. However, the main attention is given to capacitance properties.…”

mentioning

confidence: 99%

Capacitance Properties of Chemically Prepared Carbon Nanostructure/Polyazulene Composites

Grądzka

Rizzi

Bonarowska

et al. 2021

ECS J. Solid State Sci. Technol.

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This work describes the chemical formation of composites based on different carbon nanostructures, such as single-walled carbon nanotubes (SWCNT), multi-walled carbon nanotubes (MWCNT), single-layer graphene oxide (SLGO) and p-type conducting polyazulene (PAZ). The composite materials were synthesized in ethanol solution containing an appropriate amount of carbon nanostructures, azulene and ferric chloride as an oxidizing agent. The main attention was given to the electrochemical properties of these materials and their capacitance performance. The type of nanostructures influenced the morphology of the synthesized polyazulene. Thus, the relationship between the type of nanostructures present in the composite and its morphology and the electrochemical and stability properties were studied. The highest specific capacitance of 649 F g −1 was obtained for the SWCNT/ PAZ composite. This value is nine times higher than the specific capacitance of pristine polyazulene synthesized under the same conditions. The SLGO/PAZ composite exhibited the lowest specific capacitance of 53 F g −1 . However, this value was improved by approximately 77% by thermal treatment of the composite material at high temperature, resulting in an increase in the BET surface area as well as an increase in conductivity after heat treatment.

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Recent Progress on Electrochemical Capacitors Based on Carbon Nanotubes

Cited by 8 publications

References 177 publications

Fully Inkjet-Printed Biosensors Fabricated with a Highly Stable Ink Based on Carbon Nanotubes and Enzyme-Functionalized Nanoparticles

Fully Inkjet-Printed Biosensors Fabricated with a Highly Stable Ink Based on Carbon Nanotubes and Enzyme-Functionalized Nanoparticles

Current Trends and Promising Electrode Materials in Micro-Supercapacitor Printing

Capacitance Properties of Chemically Prepared Carbon Nanostructure/Polyazulene Composites

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