A 1000-Volt planar micro-supercapacitor by direct-write laser engraving of polymers

Li, Xiaoqian; Cui, Yong; Qi, Mingjing; Wu, Hongtao; Xie, Yingxi; Zang, Xining; Wen, Dandan; Teh, Kwok Siong; Ye, Jianshan; Zhou, Zhipeng; Huang, Qing‐An; Cai, Weihua; Liu, Lin

doi:10.1109/memsys.2017.7863534

Cited by 5 publications

(8 citation statements)

References 16 publications

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“…[95] Using the same design principle, Li et al successfully fabricated a 1000 V planar MSC by connecting five of the 200 V LIG-based MSCs in series. [26] The device is capable of powering an electrostatic cantilever microresonator for over 1 min. [26] The MSCs derived from LIG reaches a threshold that is limited by the electrochemical double layer and the graphene structure.…”

Section: Microsupercapacitorsmentioning

confidence: 99%

“…[15][16][17][18][19][20][21][22] Here, starting from the discovery of LIG, we will first emphasize strategies for the engineering of chemical, physical, and electronic properties of LIG; specifically, the regulation of laser parameters, atmosphere, and substrates to control the porosity, composition, and morphology of the LIG. The controllable synthesis of LIG and ease in property engineering makes it a versatile material in various applications including in sustainable energy conversions such as water splitting and fuel cell technology, [20,23] supercapacitors (SCs) for energy storage, [15,16,[24][25][26] sensors for sound, photon, strain, and chemicals detection, [27][28][29][30][31][32][33] and microfluidics [34][35][36] that are applicable to the laboratory and industrial scales, as outlined. Finally, the future advancement, such as the development of flexible electronics and biodegradable devices, will be discussed.…”

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confidence: 99%

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Laser‐Induced Graphene: From Discovery to Translation

2018

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direct laser scribing with a commercial CO 2 infrared laser system as found in most machine shops, the product being termed laser-induced graphene (LIG). [15] LIG exhibits high surface area (≈340 m 2 g −1 ), high thermal stability (>900 °C), and excellent conductivity (5-25 S cm −1 ). [15] The entire process can be performed in ambient air without any solvents, thereby making it exceedingly attractive for industrial use. This protocol combines the 3D graphene synthesis with writing into a single step process that has stimulated research ranging from fundamental studies on the transformation process to the development of a large variety of engineering applications. [15][16][17][18][19][20][21][22] Here, starting from the discovery of LIG, we will first emphasize strategies for the engineering of chemical, physical, and electronic properties of LIG; specifically, the regulation of laser parameters, atmosphere, and substrates to control the porosity, composition, and morphology of the LIG. The controllable synthesis of LIG and ease in property engineering makes it a versatile material in various applications including in sustainable energy conversions such as water splitting and fuel cell technology, [20,23] supercapacitors (SCs) for energy storage, [15,16,[24][25][26] sensors for sound, photon, strain, and chemicals detection, [27][28][29][30][31][32][33] and microfluidics [34][35][36] that are applicable to the laboratory and industrial scales, as outlined. Finally, the future advancement, such as the development of flexible electronics and biodegradable devices, will be discussed.Laser-induced graphene (LIG) is a 3D porous material prepared by direct laser writing with a CO 2 laser on carbon materials in ambient atmosphere. This technique combines 3D graphene preparation and patterning into a single step without the need for wet chemical steps. Since its discovery in 2014, LIG has attracted broad research interest, with several papers being published per month using this approach. These serve to delineate the mechanism of the LIG-forming process and to showcase the translation into many application areas. Herein, the strategies that have been developed to synthesize LIG are summarized, including the control of LIG properties such as porosity, composition, and surface characteristics, and the advancement in methodology to convert diverse carbon precursors into LIG. Taking advantage of the LIG properties, the applications of LIG in broad fields, such as microfluidics, sensors, and electrocatalysts, are highlighted. Finally, future development in biodegradable and biocompatible materials is briefly discussed. Laser-Induced Graphene

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Section: Microsupercapacitorsmentioning

confidence: 99%

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confidence: 99%

Laser‐Induced Graphene: From Discovery to Translation

2018

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“…In each PI film, both sides are converted into LIG and work as the capacitive materials. With this similar design principle, a 1000-V SC was demonstrated by Li et al All the MSCs demonstrate excellent cyclability and mechanical flexibility, which affords it great potential in the use of wearable electronics. ,,, For examples, the capacitances are over 95% retained after 10000 bending cycles at a α B of ∼90° (Figure f) …”

Section: Applications Of Ligmentioning

confidence: 99%

Laser-Induced Graphene

2018

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Research on graphene abounds, from fundamental science to device applications. In pursuit of complementary morphologies, formation of graphene foams is often preferred over the native two-dimensional (2D) forms due to the higher available area. Graphene foams have been successfully prepared by several routes including chemical vapor deposition (CVD) methods and by wet-chemical approaches. For these methods, one often needs either high temperature furnaces and highly pure gases or large amounts of strong acids and oxidants. In 2014, using a commercial laser scribing system as found in most machine shops, a direct lasing of polyimide (PI) plastic films in the air converted the PI into 3D porous graphene, a material termed laser-induced graphene (LIG). This is a one-step method without the need for high-temperature reaction conditions, solvent, or subsequent treatments, and it affords graphene with many five-and seven-membered rings. With such an atomic arrangement, one might call LIG "kinetic graphene" since there is no annealing in the process that causes the rearrangement to the preferred all-six-membered-ring form. In this Account, we will first introduce the approaches that have been developed for making LIG and to control the morphology as either porous sheets or fibrils, and to control porosity, composition, and surface properties. The surfaces can be varied from being either superhydrophilic with a 0° contact angle with water to being superhydrophobic having >150° contact angle with water. While it was initially thought that the LIG process could only be performed on PI, it was later shown that a host of other polymeric substrates, nonpolymers, metal/plastic composites, and biodegradable and naturally occurring materials and foods could be used as platforms for generating LIG. Methods of preparation include roll-to-roll production for fabrication of in-plane electronics and two different 3D printing (additive manufacturing) routes to specific shapes of LIG monoliths using both laminated object manufacturing and powder bed fabrication methods. Use of the LIG in devices is performed very simply. This is showcased with high performance supercapacitors, fuel cell materials for oxygen reduction reactions, water splitting for both hydrogen and oxygen evolution reactions coming from the same plastic sheet, sensor devices, oil/water purification platforms, and finally applications in both passive and active biofilm inhibitors. So the ease of formation of LIG, its simple scale-up, and its utility for a range of applications highlights the easy transition of this substrate-bound graphene foam into commercial device platforms.

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“…9−11 This innovative graphene exhibits high thermal stability (>900 °C), excellent con-ductivity (5−25 S/cm), and high surface area (∼340 m 2 /g), thus being a versatile material that can be easily reengineered morphologically and structurally by just modifying the laser parameters. 9,10 LIG presents excellent potential for synthesis at industrial scale with application already demonstrated in supercapacitors, 10,12,13 sensors and biosensors, 14−20 energy conversion, 21,22 microfluidics, 23,24 and antimicrobial electrodes. 25−27 Laser-assisted processing differs from other techniques concerning the formation of a 3D graphene structure.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Laser-induced graphene is a 3D porous material prepared through photothermal transition with a pulsed infrared laser on carbon substrates in ambient conditions without using any solvents, thereby generating material with differentiated physical and chemical properties. − This innovative graphene exhibits high thermal stability (>900 °C), excellent conductivity (5–25 S/cm), and high surface area (∼340 m 2 /g), thus being a versatile material that can be easily reengineered morphologically and structurally by just modifying the laser parameters. , LIG presents excellent potential for synthesis at industrial scale with application already demonstrated in supercapacitors, ,, sensors and biosensors, − energy conversion, , microfluidics, , and antimicrobial electrodes. − Laser-assisted processing differs from other techniques concerning the formation of a 3D graphene structure. Moreover, it enables the design of complex LIG geometries with high resolution and without the use of masks.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Electrical Properties of Cellulose Nanocrystals through Laser-Induced Graphitization for UV Photodetectors

Claro

Marques

Cunha

et al. 2021

ACS Appl. Nano Mater.

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Laser-induced graphene from abundant and renewable biobased carbon sources may open the way for sustainable and lowcost electronic device generation. Yet little progress has been made on nanocellulose-based materials to produce laser-induced graphene (LIG). In this work, we demonstrate the versatility of the laserassisted technique to promote graphitization of pineapple cellulose nanocrystals (CNCs), aimed at UV photodetectors. CNCs tablets are used as carbon-based precursors to photonically synthesize LIG nanopowders, which are used as functional materials in the formulation of printable cellulose composite electroconductive inks, using sodium carboxymethyl cellulose (CMC) as a binder. The developed CMC/LIG inks are used to pattern LIG electrodes (LIGE) on tracing paper, using hand-drawing techniques. The impact of the laser parameters in the conversion of the CNCs tablets into graphene nanopowder, as well as the influence of the CMC/LIG ink composition allied with an additional laser treatment on the chemical, morphological, and electrical properties of the hand-drawn cellulose composite films is systematically addressed. The LIG nanopowder composite films reveal less sheet resistance after laser treatment. The optimal conditions were found for 0.6 w/v% of LIG nanopowder in CMC solution at +1.1 mm defocus, 8.2 cm/s tip laser speed and 2.4 W CO 2 laser power. As a proof-of-concept, fully printed zinc oxide UV photodetectors with the optimized LIGE are demonstrated, showing a superior performance in comparison to other UV sensors described in the literature.

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A 1000-Volt planar micro-supercapacitor by direct-write laser engraving of polymers

Cited by 5 publications

References 16 publications

Laser‐Induced Graphene: From Discovery to Translation

Laser‐Induced Graphene: From Discovery to Translation

Laser-Induced Graphene

Tuning the Electrical Properties of Cellulose Nanocrystals through Laser-Induced Graphitization for UV Photodetectors

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