Fabrication of a stretchable and patchable array of high performance micro-supercapacitors using a non-aqueous solvent based gel electrolyte

Lee, Geumbee; Kim, Daeil; Kim, Doyeon; Oh, Sangwoo; Yun, Jong-Won; Kim, Jihyun; Lee, Sang Soo; Ha, Jeong Sook

doi:10.1039/c5ee00670h

Cited by 143 publications

(127 citation statements)

References 37 publications

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“…[33][34][35][36][37][38][39] Both the photolithography and liquid metal process will result in low production efficiencies and high costs for the MSCA devices, which would be very detrimental to the large-scale production of MSCA devices and their commercial application. To ensure the highly stretchable characteristics of the MSCAs, the key lies in the construction of highly elastic/stretchable conductive frameworks (bridges) interconnecting the MSC islands.…”

Section: Mscas: Fabrication and Mechanical And Electrochemical Propermentioning

confidence: 99%

“…[20][21][22][23][24] To date, a variety of novel deformable energy storage systems have been demonstrated for application as compatible power sources in flexible/ stretchable electronic devices. In contrast, the emerging 2D planar stretchable micro-supercapacitor arrays (MSCAs) would be a better choice for integration into the usually planar stretchable electronic circuits due to their more rational segmented structural design: [34][35][36] First, the micro-supercapacitor units (islands) with a planar electrode configuration only serve as the active region for energy storage and do not involve tensile deformation, enabling the interdigital electrodes to maintain a constant distance and not to be destroyed during repeated tensile deformation, and thus guaranteeing the electrochemical stability of the device. [30][31][32][33] Conventional stretchable SCs consisting of sandwich electrodes usually acquire their stretchability based on the prestrain applied to an elastic substrate before assembly of the components and the stretchability of the formed wavelike electrodes bonded to the prestrained elastic substrate.…”

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confidence: 99%

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Kirigami Patterning of MXene/Bacterial Cellulose Composite Paper for All‐Solid‐State Stretchable Micro‐Supercapacitor Arrays

et al. 2019

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Stretchable micropower sources with high energy density and stability under repeated tensile deformation are key components of flexible/wearable microelectronics. Herein, through the combination of strain engineering and modulation of the interlayer spacing, freestanding and lightweight MXene/bacterial cellulose (BC) composite papers with excellent mechanical stability and a high electrochemical performance are first designed and prepared via a facile all‐solution‐based paper‐making process. Following a simple laser‐cutting kirigami patterning process, bendable, twistable, and stretchable all‐solid‐state micro‐supercapacitor arrays (MSCAs) are further fabricated. As expected, benefiting from the high‐performance MXene/BC composite electrodes and rational sectional structural design, the resulting kirigami MSCAs exhibit a high areal capacitance of 111.5 mF cm −2 , and are stable upon stretching of up to 100% elongation, and in bent or twisted states. The demonstrated combination of an all‐solution‐based MXene/BC composite paper‐making method and an easily manipulated laser‐cutting kirigami patterning technique enables the fabrication of MXene‐based deformable all‐solid‐state planar MSCAs in a simple and efficient manner while achieving excellent areal performance metrics and high stretchability, making them promising micropower sources that are compatible with flexible/wearable microelectronics.

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Section: Mscas: Fabrication and Mechanical And Electrochemical Propermentioning

confidence: 99%

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confidence: 99%

Kirigami Patterning of MXene/Bacterial Cellulose Composite Paper for All‐Solid‐State Stretchable Micro‐Supercapacitor Arrays

et al. 2019

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“…In view of diverse functions of smart watches, there are increasing demands on their corresponding energy storage devices with high energy and/or power supply ability. [9][10][11][12][13] However, the energy storage devices are commonly placed in the watches with very small volume, which seriously limit their current energy storage ability and the future boost space. As we know, watchband is an important part of a watch and it plays the fixation function of the watch with a human wrist.…”

mentioning

confidence: 99%

Watchband‐Like Supercapacitors with Body Temperature Inducible Shape Memory Ability

Liu

Shen

Jiang

et al. 2016

Advanced Energy Materials

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shopping, detecting body-health, and so on. Nowadays, many major companies are working on exploring more functions on smart watches. In view of diverse functions of smart watches, there are increasing demands on their corresponding energy storage devices with high energy and/or power supply ability. [9][10][11][12][13] However, the energy storage devices are commonly placed in the watches with very small volume, which seriously limit their current energy storage ability and the future boost space. As we know, watchband is an important part of a watch and it plays the fixation function of the watch with a human wrist. Therefore, it can be imagined that, if the watchband had energy storage function, it might meet energy and/or power demands for the smart watches. Taking this into account, such smart watchband should have the right characteristics of flexible energy storage devices, including outstanding electrochemical performance, excellent flexibility, and good performance reliability while bending. In addition, good biocompatibility is a requirement for its practical application because of its direct touch with human skin.Supercapacitors are important energy storage devices, and they have attracted great attention for wearable electronic equipment due to their high power delivery ability, long cycle life, good safety as well as simple manufacturing. [14][15][16][17][18][19][20][21] Here, we demonstrate a new design and fabrication of flexible asymmetric supercapacitors with a smart "watchband-like" function, using reduced graphene oxide (rGO) coated on TiNi alloy (TNA) flake as the negative electrode, MnO 2 deposited on ultrathin Ni foil as the positive electrode, and aqueous or ion liquid-based gel electrolyte as the separator. TNA is a shape memory alloy (SMA) which can "remember" a presupposed shape at high temperature and it is free to bend and can hold the corresponding bending-shape below its phase transition temperature (PTT), and it can restore to the presupposed shape when the temperature is higher than its PTT. [22][23][24][25] In our study, as-made supercapacitors are able to possess excellent electrochemical capacitive properties, maintain the inherent characteristics of SMA (flexibility and shape recovery ability), and have outstanding electrochemical performance reliability while bending. Interestingly, because the PTT of TNA we used is 15 °C, the human skin temperature can directly actuate the shape recovery of the devices. Specifically, we use such a shape Smart watches have gained worldwide popularity because they can integrate diverse functions all in one. However, their energy storage devices currently being used are placed in the watches, and this design seriously limited the energy support ability and the future boost space. Herein, for the first time, a strategy to integrate energy storage device with watchband is put forward, which is realized by the preparation of watchband-like solid-state supercapacitors using graphene coated on TiNi alloy flake as the negative electrode, ultrathin MnO ...

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“…[195] The medical adhesive tape is easy to wear and peel on skins, and thus the skin-mounted supercapacitors are convenient to be directly mounted on different parts of skin at various stretching or bending states. [196] The device exhibited high mechanical stability under Adv. For example, a supercapacitor encapsulated in stretchable Ecoflex substrate could be directly attached to skin using silicone adhesives, as shown in Figure 9d.…”

Section: Skin-touching Wearablesmentioning

confidence: 99%

Stretchable Supercapacitors as Emergent Energy Storage Units for Health Monitoring Bioelectronics

Chen

Villa

Zhuang

et al. 2019

Advanced Energy Materials

104

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Emerging health monitoring bioelectronics require energy storage units with improved stretchability, biocompatibility, and self‐charging capability. Stretchable supercapacitors hold great potential for such systems due to their superior specific capacitances, power densities, and tissue‐conforming properties, as compared to both batteries and conventional capacitors. Despite the rapid progress that has been made in supercapacitor research, practical applications in health monitoring bioelectronics have yet to be achieved, requiring innovations in materials, device configurations, and fabrications tailored for such applications. In this review, the progress in stretchable supercapacitor‐powered health monitoring bioelectronics is summarized and the required specifications of supercapacitors for different types of application settings with varying demands on biocompatibility are discussed, including nontouching wearables, skin‐touching wearables, skin‐conforming wearables, and implantables. The perspective of this review is then broadened to focus on integration of stretchable supercapacitors in bioelectronics and aspects of energy harvesting and sensing. Finally further insights on the existing challenges in this developing field and potential solutions are provided.

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Fabrication of a stretchable and patchable array of high performance micro-supercapacitors using a non-aqueous solvent based gel electrolyte

Abstract: We report on air stable planar micro-supercapacitors (MSCs) using a non-aqueous solvent based gel electrolyte and stable performance of encapsulated MSC array under stretching and exposure to water.

Cited by 143 publications

References 37 publications

Kirigami Patterning of MXene/Bacterial Cellulose Composite Paper for All‐Solid‐State Stretchable Micro‐Supercapacitor Arrays

Kirigami Patterning of MXene/Bacterial Cellulose Composite Paper for All‐Solid‐State Stretchable Micro‐Supercapacitor Arrays

Watchband‐Like Supercapacitors with Body Temperature Inducible Shape Memory Ability

Stretchable Supercapacitors as Emergent Energy Storage Units for Health Monitoring Bioelectronics

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