Sustainable design of high-performance multifunctional carbon electrodes by one-step laser carbonization for supercapacitors and dopamine sensors

Moon, Sanghwa; Senokos, Evgeny; Trouillet, Vanessa; Loeffler, Felix F.; Strauss, Volker

doi:10.1039/d4nr00588k

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…Additionally, the porous nature of wood is leveraged for energy storage applications 25 , 26 , enhancing its utility further. Fabricating electrodes on wood necessitates the use of various techniques, including printing 27 , laser carbonization 28 , conductive inks 29 , and carbon nanotubes 30 , to ensure efficient integration of electronic components. This amalgamation of wood's inherent properties and advanced fabrication methods underscores its potential in advancing electronic device technology.…”

Section: Introductionmentioning

confidence: 99%

Calligraphic interdigitated capacitive sensors for green electronics

Thakur,

Srivatava,

Park

et al. 2024

Sci Rep

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This study presents a novel approach to fabricating interdigitated capacitive (IDC) touch sensors using graphite-based pencils on a wood substrate. The sensors were designed to detect touches and pressure variations, offering a cost-effective and environmentally friendly solution for sensor fabrication. The fabrication process involved abrasion of graphite pencils on a wooden substrate to create conductive traces, followed by the integration of interdigitated electrode structures. Capacitance variations resulting from touch interactions were investigated to calibrate sensor responses for tailored tasks. The sensitivity of the sensor was found to be 1.2 pF/kPa, highlighting its responsiveness to pressure variations. Additionally, the sensors were interfaced with an Arduino Uno microcontroller board to demonstrate practical applications, such as replicating arrow key functionality. Additionally, the sensors exhibit sensitivity to environmental factors, with the relative change in capacitance increasing from 0.1 to 0.65 as relative humidity ranges from 30 to 90%. Furthermore, variations in temperature from 30 to 60ºC result in a relative change in capacitance increasing to approximately 0.5. The results indicate the feasibility and versatility of using wood-based substrates and graphite-based pencils for fabricating IDC touch sensors, offering promising prospects for sustainable and accessible sensor technology.

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Section: Introductionmentioning

confidence: 99%

Calligraphic interdigitated capacitive sensors for green electronics

Thakur,

Srivatava,

Park

et al. 2024

Sci Rep

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Iron‐Catalyzed Laser‐Induced Graphitization – Multiscale Analysis of the Structural Evolution and Underlying Mechanism

Dreimol,

Kürsteiner,

Ritter

et al. 2024

Small

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The transition to sustainable materials and eco‐efficient processes in commercial electronics is a driving force in developing green electronics. Iron‐catalyzed laser‐induced graphitization (IC‐LIG) has been demonstrated as a promising approach for rendering biomaterials electrically conductive. To optimize the IC‐LIG process and fully exploit its potential for future green electronics, it is crucial to gain deeper insights into its catalyzation mechanism and structural evolution. However, this is challenging due to the rapid nature of the laser‐induced graphitization process. Therefore, multiscale preparation techniques, including ultramicrotomy of the cross‐sectional transition zone from precursor to fully graphitized IC‐LIG electrode, are employed to virtually freeze the IC‐LIG process in time. Complementary characterization is performed to generate a 3D model that integrates nanoscale findings within a mesoscopic framework. This enabled tracing the growth and migration behavior of catalytic iron nanoparticles and their role during the catalytic laser‐graphitization process. A three‐layered arrangement of the IC‐LIG electrode is identified including a highly graphitized top layer with an interplanar spacing of 0.343 nm. The middle layer contained γ‐iron nanoparticles encapsulated in graphitic shells. A comparison with catalyst‐free laser graphitization approaches highlights the unique opportunities that IC‐LIG offers and discuss potential applications in energy storage devices, catalysts, sensors, and beyond.

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Prospects into the Role of Nanoporous Electrodes for Supercapacitors: Insight into Their Structure and Performance

Kannan,

Kumar S,

Das

et al. 2024

Energy Fuels

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Electrochemical supercapacitors (SCs) have innumerably met the demand for various energy storage applications by virtue of their excellent reversibility, swift charge–discharge, longer lifespan, and enlarged power densities (PDs). In this realm, designing novel electrode materials with tailored morphologies is essential to improve the SC’s electrochemical performance. This entails introducing nanostructured electrode materials that directly enhance the charge storage capacity of the SC via tunable compositions, dimensions, and morphologies with variable porosities. Thus, reasonable development of homogeneous and heterogeneous three-dimensional (3D) self-supporting electrodes with variable porosities has led to noteworthy improvements in the field of SCs in recent years. Various research studies have also proven that to fabricate a SC with high energy and PD, reduced ion diffusion length, accompanied by greater surface area (SA), is highly necessary, which can be reliably achieved by 3D nanoporous electrodes because of their unique characteristics, which facilitate for increased charge transfer reaction kinetics, accumulating the electrode’s electrical conductivity, and boosting its capacity for energy storage. Henceforth, this paper presents an outline of the fundamental charge storage mechanisms involved in SCs, with special emphasis on the synthesis and electrochemical performance improvement aspects of EDLC, and pseudocapacitive nanoporous electrodes. In conclusion, difficulties and prospects of the role of nanoporous electrodes in SCs are also effectually highlighted.

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Sustainable design of high-performance multifunctional carbon electrodes by one-step laser carbonization for supercapacitors and dopamine sensors

Abstract: Laser carbonization is a rapid method to produce functional carbon materials for electronic devices, but many typical carbon precursors are not sustainable and/or require extensive processing for electrochemical applications. Here,...

Cited by 3 publications

References 51 publications

Calligraphic interdigitated capacitive sensors for green electronics

Calligraphic interdigitated capacitive sensors for green electronics

Iron‐Catalyzed Laser‐Induced Graphitization – Multiscale Analysis of the Structural Evolution and Underlying Mechanism

Prospects into the Role of Nanoporous Electrodes for Supercapacitors: Insight into Their Structure and Performance

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