Material and structural design of microsupercapacitors

Wang, Mengting; Zhang, Junying; Wang, Yuxuan; LU, Y.

doi:10.1007/s10008-021-05057-y

Cited by 12 publications

(8 citation statements)

References 83 publications

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“…The electrochemical and energy storage properties of the produced MSC were thoroughly characterized by CV and galvanostatic charge–discharge (GCD) experiments. As shown in Figure j, the produced MSC presents a quasi-rectangular CV curve shape in a wide range of scan rates (5 to 100 mV/s), which is characteristic of electric double-layer capacitors (EDLCs) and indicates good electrochemical stability. , Corroborating these results, GCD curves demonstrate that transferred LIG MSCs exhibit electrochemical capacitive behavior with an almost ideal symmetric triangular shape and very low voltage drop (Figure k). The areal specific capacitance ( C A ) from the GCD curves was calculated to be 5.76 ± 0.35 mF/cm 2 for a current density of 0.010 mA/cm 2 (Figure l), which is comparable with other published works. , Even increasing the current density to 0.100 mA/cm 2 , the devices still exhibited a C A of 3.77 ± 0.31 mF/cm 2 , confirming their good capacitive behavior.…”

Section: Results and Discussionmentioning

confidence: 66%

“…As shown in Figure 4j, the produced MSC presents a quasi-rectangular CV curve shape in a wide range of scan rates (5 to 100 mV/s), which is characteristic of electric double-layer capacitors (EDLCs) and indicates good electrochemical stability. 59,60 Corroborating these results, GCD curves demonstrate that transferred LIG MSCs exhibit electrochemical capacitive behavior with an almost ideal symmetric triangular shape and very low voltage drop (Figure 4k). The areal specific capacitance (C A ) from the GCD curves was calculated to be 5.76 ± 0.35 mF/cm 2 for a current density of 0.010 mA/cm 2 (Figure 4l), which is comparable with other published works.…”

Section: Boosting the Properties Of Paper-based Lig Through Colored P...mentioning

confidence: 56%

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Water Peel-Off Transfer of Electronically Enhanced, Paper-Based Laser-Induced Graphene for Wearable Electronics

et al. 2022

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Laser-induced graphene (LIG) has gained preponderance in recent years, as a very attractive material for the fabrication and patterning of graphitic structures and electrodes, for multiple applications in electronics. Typically, polymeric substrates, such as polyimide, have been used as precursor materials, but other organic, more sustainable, and accessible precursor materials have emerged as viable alternatives, including cellulose substrates. However, these substrates have lacked the conductive and chemical properties achieved by conventional LIG precursor substrates and have not been translated into fully flexible, wearable scenarios. In this work, we expand the conductive properties of paper-based LIG, by boosting the graphitization potential of paper, through the introduction of external aromatic moieties and meticulous control of laser fluence. Colored wax printing over the paper substrates introduces aromatic chemical structures, allowing for the synthesis of LIG chemical structures with sheet resistances as low as 5 Ω·sq–1, translating to an apparent conductivity as high as 28.2 S·cm–1. Regarding chemical properties, I D/I G ratios of 0.28 showcase low defect densities of LIG chemical structures and improve on previous reports on paper-based LIG, where sheet resistance has been limited to values around 30 Ω·sq–1, with more defect dense and less crystalline chemical structures. With these improved properties, a simple transfer methodology was developed, based on a water-induced peel-off process that efficiently separates patterned LIG structures from the native paper substrates to conformable, flexible substrates, harnessing the multifunctional capabilities of LIG toward multiple applications in wearable electronics. Proof-of concept electrodes for electrochemical sensors, strain sensors, and in-plane microsupercapacitors were patterned, transferred, and characterized, using paper as a high-value LIG precursor for multiples scenarios in wearable technologies, for improved sustainability and accessibility of such applications.

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Section: Results and Discussionmentioning

confidence: 66%

Section: Boosting the Properties Of Paper-based Lig Through Colored P...mentioning

confidence: 56%

Water Peel-Off Transfer of Electronically Enhanced, Paper-Based Laser-Induced Graphene for Wearable Electronics

et al. 2022

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“…2,3 Due to the low power density and short cycle life of micro batteries, 4 they cannot meet the requirements of rapid charge-discharge and high cycle life requirements. 5 Meanwhile, MSCs [6][7][8][9][10] have the advantages of high power density, small device area, and long-term life, which meet the needs of application and development. However, as a new type of energy storage device, MSCs are limited by many challenges, such as low energy density, high internal resistance, poor cycle stability, and complex micro-volume fabrication techniques.…”

mentioning

confidence: 99%

MXene Surface Functional Groups Regulation: Enhancing Area Capacitance of Divalent Zinc Ion Micro-Supercapacitor

Peng

Han

Tang

2022

J. Electrochem. Soc.

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As an emerging two-dimensional material, Mxene is widely used in the field of energy storage, especially for micro-supercapacitors (MSC). After the etching of the original Ti3AlC2, the obtained surface of Ti3C2Tx Mxene has a grand number of functional groups, such as (-F, -OH, -O). Here, we introduced bacterial cellulose(BC) with an amount of functional groups to widen the layer spacing, so that more metal ions were adsorbed on the surface of MXene, then KOH solution was added for treatment mixed solution of MXene/BC. We confirmed by FT-IR that a grand number of groups were present on the surfaces of Ti3C2Tx and BC, and then characterized by XPS and found that the oxygen functional group strength on the surface of the treated MXene/BC composite film was significantly increased compared to the untreated MXene/BC composite film. The electrochemical performance test showed that the composite film treated with KOH solution as the MSC electrode had an area capacitance of 223 mF cm-2 and an area energy density of 42 µWh cm-2, which was better than composite film electrode of the MSC without KOH treatment (area capacitance of 161 mF cm-2 and area energy density of 31 µWh cm-2).

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“…So far, many microfabrication strategies have been demonstrated to construct MSCs with sophisticated configurations [48,49].…”

Section: Microfabrication Strategymentioning

confidence: 99%

Recent status and future perspectives of ultracompact and customizable micro-supercapacitors

Wu¹,

Wang²,

Ma³

et al. 2022

Nano Research Energy

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Ultracompact and customizable micro-supercapacitors (MSCs) are highly demanded for powering microscale electronics of 5G and Internet of Things technologies. So far, tremendous efforts have been concentrated on fabricating high-performance MSCs; however, compatible fabrication and monolithic integration of MSCs with microelectronic systems still remains a huge challenge taking into full consideration the factors such as electrode film fabrication, high-resolution microelectrode pattern, and electrolyte precise deposition. In this review, we summarize the recent advances of ultrasmall and integrated MSCs with tunable performance and customizable function, including key microfabrication technologies for patterning microelectrodes with superior resolution, precise deposition of customized electrolytes in an extremely small space, and feasible strategies for improving electrochemical performance by constructing thick microelectrodes and special electrode structure. Finally, the related challenges and key prospects of ultracompact and customizable MSCs, including compatible microfabrication methods for electrode materials and films, patterning microelectrodes, customizing shape-conformable electrolytes, performance optimization, and efficient integration with microelectronic systems, are put forward for further promoting their practical application.

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Material and structural design of microsupercapacitors

Cited by 12 publications

References 83 publications

Water Peel-Off Transfer of Electronically Enhanced, Paper-Based Laser-Induced Graphene for Wearable Electronics

Water Peel-Off Transfer of Electronically Enhanced, Paper-Based Laser-Induced Graphene for Wearable Electronics

MXene Surface Functional Groups Regulation: Enhancing Area Capacitance of Divalent Zinc Ion Micro-Supercapacitor

Recent status and future perspectives of ultracompact and customizable micro-supercapacitors

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