Flexible Asymmetric Supercapacitor Based on Functionalized Reduced Graphene Oxide Aerogels with Wide Working Potential Window

Bora, Anindita; Mohan, K.; Doley, Simanta; Dolui, Swapan Kumar

doi:10.1021/acsami.7b18610

Cited by 50 publications

(21 citation statements)

References 62 publications

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“…Potential ( U ), as a crucial parameter, has strictly prelimited its energy output. The fabricated asymmetrical coplanar micro‐supercapacitor (AMSC) consisted of the faradaic anode with high oxygen evolution overpotential and capacitive cathode can amplify unit voltage, thus achieving giant potential window . Capacitance ( C ), as another important parameter, has an important effect on the energy output.…”

Section: Introductionmentioning

confidence: 99%

Laser‐Assisted Large‐Scale Fabrication of All‐Solid‐State Asymmetrical Micro‐Supercapacitor Array

Gao

Shao

et al. 2018

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The micro-supercapacitors are of great value for portable, flexible, and integrated electronic equipments. Here, the large-scale and integrated asymmetrical micro-supercapacitor (AMSC) array is fabricated in virtue of the laser direct writing and electrodeposition technology. The AMSC shows the ideal flexibility, high areal specific capacitance (21.8 mF cm ), and good rate capability. Moreover, its energy density reaches 12.16 µW h cm , outperforming most micro-supercapacitors reported previously. Meanwhile, large-scale series-connected AMSCs are integrated on the flexible substrates (e.g., indium tin oxide-polyethylene terephthalate film), which can power a veriety of the commercial electronics. The combination of AMSCs array, solar cell, and electronic device proves the feasibility for practical application in the portable, flexible, and integrated electronic equipments.

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Section: Introductionmentioning

confidence: 99%

Laser‐Assisted Large‐Scale Fabrication of All‐Solid‐State Asymmetrical Micro‐Supercapacitor Array

Gao

Shao

et al. 2018

Small

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“…It has been demonstrated that Graphene, a single layer of carbon atoms closely packed into a honeycomb twodimensional (2D) lattice (Novoselov et al, 2004), has potential for flexible electrochemical energy storage device applications due to its outstanding characteristics of chemical stability, high electrical conductivity and large surface area (Yan Wang et al, 2009). Applied into supercapacitors, it has been employed as an electrode when coupled with a wide variety of materials like cellulose (Pushparaj et al, 2007;Xing et al, 2019), polyaniline (de Souza Augusto et al, 2018;Kang et al, 2019), metallic foams (Gao et al, 2018;Manjakkal et al, 2018;Taniya Purkait, 2018) and aerogels (Bora et al, 2018) rendering overall promising results. Similarly, flexible Li-Ion batteries have also used carbon nanotubes as electrodes combined with graphene foams (Ren et al, 2018), carbon fibers , metal-oxides (Guo et al, 2019;Bubulinca et al, 2020) and nanoparticles (Yuan et al, 2018).…”

Section: Energy Storagementioning

confidence: 99%

Flexible Electronics: Status, Challenges and Opportunities

2020

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The concept of flexible electronics has been around for several decades. In principle, anything thin or very long can become flexible. While cables and wiring are the prime example for flexibility, it was not until the space race that silicon wafers used for solar cells in satellites were thinned to increase their power per weight ratio, thus allowing a certain degree of warping. This concept permitted the first flexible solar cells in the 1960s (Crabb and Treble, 1967). The development of conductive polymers (Shirakawa et al., 1977), organic semiconductors, and amorphous silicon (Chittick et al., 1969; Okaniwa et al., 1983) in the following decades meant huge strides toward flexibility and processability, and thus these materials became the base for electronic devices in applications that require bending, rolling, folding, and stretching, among other properties that cannot be fulfilled by conventional electronics (Cheng and Wagner, 2009) (Figure 1). Presently there is great interest in new materials and fabrication techniques which allow for highperformance scalable electronic devices to be manufactured directly onto flexible substrates. This interest has also extended to not only flexibility but also properties like stretchability and healability which can be achieved by utilizing elastomeric substrates with strong molecular interactions (Oh et al., 2016; Kang et al., 2018). Likewise, biocompatibility and biodegradability has been achieved through polymers that do not cause adverse effect to the body and can be broken down into smaller constituent pieces after utilization (Bettinger and Bao, 2010; Irimia-Vladu et al., 2010; Liu H. et al., 2019). This new progress is now enabling devices which can conform to complex and dynamic surfaces, such as those found in biological systems and bioinspired soft robotics. These next-generation flexible electronics open up a wide range of exciting new applications such as flexible lighting and display technologies for consumer electronics, architecture, and textiles, wearables with sensors that help monitor our health and habits, implantable electronics for improved medical imaging and diagnostics, as well as extending the functionality of robots and unmanned aircraft through lightweight and conformable energy harvesting devices and sensors. While conventional electronics are very capable of these functions, flexible electronics are intended to expand the mechanical features to adhere to novel form factors through hybrid strategies, or as standalone solutions where the application does not require high computation power, intended to be highly robust to deformation, low cost, thin, or disposable. The definition of flexibility differs from application to application. From bending and rolling for easier handling of large area photovoltaics, to conforming onto irregular shapes, folding, twisting, stretching, and deforming required for devices in electronic skin, all while maintaining device performance and reliability. While early progress and many important innovations have alre...

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“…Commercially available supercapacitors still abide by low energy densities which are incapable of being exchanged for a battery as a power source. 1,2 Pseudo capacitors and electrical double layer capacitors (EDLCs) are the two categories of supercapacitor electrode materials owing to their fast reduction, oxidation and reversible reaction pseudocapacitance that can produce a higher capacitance and energy density than EDLCs. [3][4][5] Owing to the presence of the functional groups containing oxygen, graphene demonstrates a higher capacitance.…”

Section: Introductionmentioning

confidence: 99%

Copper nanoparticles anchored onto boron-doped graphene nanosheets for use as a high performance asymmetric solid-state supercapacitor

Pandian

Pandurangan

2019

RSC Adv.

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Flexible Asymmetric Supercapacitor Based on Functionalized Reduced Graphene Oxide Aerogels with Wide Working Potential Window

Cited by 50 publications

References 62 publications

Laser‐Assisted Large‐Scale Fabrication of All‐Solid‐State Asymmetrical Micro‐Supercapacitor Array

Laser‐Assisted Large‐Scale Fabrication of All‐Solid‐State Asymmetrical Micro‐Supercapacitor Array

Flexible Electronics: Status, Challenges and Opportunities

Copper nanoparticles anchored onto boron-doped graphene nanosheets for use as a high performance asymmetric solid-state supercapacitor

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