Microfluidic etching for fabrication of flexible and all-solid-state micro supercapacitor based on MnO2 nanoparticles

Xue, Mianqi; Xie, Zhuang; Zhang, Lesheng; Ma, Xinlei; Wu, Xing‐Long; Guo, Yu‐Guo; Song, Weiguo; Li, Zhibo; Cao, Tingbing

doi:10.1039/c0nr00990c

Cited by 147 publications

(94 citation statements)

References 33 publications

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“…From a materials perspective, carbon is earth abundant and inexpensive; hence, many nanostructured carbon-based materials have been studied for use in electric double-layer (EDL) micro-supercapacitors, including activated carbons 4 , carbon nanotubes 5 , carbide-derived carbons 1,6 and onion-like carbon 2 . In addition, transition metal oxides such as ruthenium oxide 7 and manganese oxide 8 , and conducting polymers such as polypyrrole 9 and polyaniline 10 have been used as materials for pseudo-capacitive micro-supercapacitors. Among all the previous examples, only onion-like carbon has produced a microsupercapacitor with ultrahigh-power handling with an RC time constant of only 26 ms (ref.…”

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confidence: 99%

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

2013

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The rapid development of miniaturized electronic devices has increased the demand for compact on-chip energy storage. Microscale supercapacitors have great potential to complement or replace batteries and electrolytic capacitors in a variety of applications. However, conventional micro-fabrication techniques have proven to be cumbersome in building cost-effective micro-devices, thus limiting their widespread application. Here we demonstrate a scalable fabrication of graphene micro-supercapacitors over large areas by direct laser writing on graphite oxide films using a standard LightScribe DVD burner. More than 100 micro-supercapacitors can be produced on a single disc in 30 min or less. The devices are built on flexible substrates for flexible electronics and on-chip uses that can be integrated with MEMS or CMOS in a single chip. Remarkably, miniaturizing the devices to the microscale results in enhanced charge-storage capacity and rate capability. These microsupercapacitors demonstrate a power density of B200 W cm À 3 , which is among the highest values achieved for any supercapacitor.

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confidence: 99%

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

2013

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“…[ 13,20,28 ] Here, we propose a modifi ed novel 3D interdigital electrode structures (as shown in Figure 6 ) to enhance the performance of supercapacitors in order to meet the practical demands and simplify the fabrication technique to facilitate the industrial production. All the procedures were carried out by low-cost industrial equipment with very simple steps, which was demonstrated in the previous text.…”

Section: Resultsmentioning

confidence: 99%

Stretchable Supercapacitor with Adjustable Volumetric Capacitance Based on 3D Interdigital Electrodes

Chen

Wang

et al. 2015

Adv Funct Materials

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4601wileyonlinelibrary.com fabricate, [ 14 ] has shown good performance as electrodes in energy harvesting/storage devices, such as solar cells, [15][16][17] secondary batteries, [ 18 ] and especially supercapacitors. [ 8,[10][11][12] Combined with the solution preparation and the fl exibility, rGO has already been expected as a competitive alternative for the next-generation fl exible supercapacitors.Despite being one kind of the ideal electrode materials, the present rGO-based materials are restricted by unsatisfactory volumetric capacitance in fl exible devices. On the one hand, the specifi c capacitance of rGO is not high (generally 50-200 F g −1 ), which depends on the electrical double layer at the interface between electrode and electrolyte. [ 19 ] On the other hand, the large inert space in practical devices (large volume ratio of encapsulation layers in the device) also accounts for the low volumetric energy density. [ 9 ] These two points have plagued the integration of rGO-based fl exible supercapacitors into roll-up displays, wearable device or other fl exible microdevices. Therefore, researchers are striving to fi nd new feasible method for preparing rGO-based electrodes with satisfactory electrochemical performance, including high volumetric capacitance and long cycle life. Previously, we fabricated fl exible microsupercapacitor with well-ordered conducting polymer nanostructures on rGO interdigital electrodes to enhance the specifi c capacitance through synergistic effect. [ 20 ] This high-performance microsupercapacitor provides a promising power source whose reliability and performance might meet the energy demands of the next-generation miniaturized electronic devices, especially fl exible devices. More recently, some feasible methods have also been studied by other research groups. For example, 3D interpenetrating graphene electrodes have been fabricated by electrochemical reduction of GO for ultrahigh rate supercapacitors; [ 21 ] Gao co-workers proposed a coaxial wet-spinning assembly approach to continuously spin polyelectrolyte-wrapped graphene/CNT core-sheath yarns and the yarn-based supercapacitors showed a capacitance of 177 mF cm −2 in solid electrolyte (SE); [ 22 ] carbon microfi bers made of aligned single-walled carbon nanotubes (SWCNTs) and nitrogen-doped rGO sheets are produced and show a specifi c volumetric capacity of 300 F cm −3 in polyvinyl alcohol (PVA)/ H 3 PO 4 electrolyte; [ 23 ] to further improve the capacitance, metal oxides, and conducting polymer are introduced to composite with carbon materials. [ 24,25 ] These modifi cations show valuable characteristics in enhancing the performance, especially the specifi c capacitance; Stretchable Supercapacitor with Adjustable Volumetric Capacitance Based on 3D Interdigital ElectrodesFengwang Li , Jitao Chen , * Xusheng Wang , Mianqi Xue , * and G. F. Chen Reduced graphene oxide (rGO)-based materials have shown good performance as electrodes in fl exible energy storage devices owing to their physical properties, high specifi c ...

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“…In the pioneering work by Xue et al, [152] a thin layer of MnO 2 nanofiber film was first deposited by electrospinning, which was then transferred onto gel electrolyte and sputtered with an ITO layer. In the pioneering work by Xue et al, [152] a thin layer of MnO 2 nanofiber film was first deposited by electrospinning, which was then transferred onto gel electrolyte and sputtered with an ITO layer.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Stretchable Supercapacitors as Emergent Energy Storage Units for Health Monitoring Bioelectronics

Chen

Villa

Zhuang

et al. 2019

Advanced Energy Materials

109

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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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Microfluidic etching for fabrication of flexible and all-solid-state micro supercapacitor based on MnO2 nanoparticles

Cited by 147 publications

References 33 publications

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

Scalable fabrication of high-power graphene micro-supercapacitors for flexible and on-chip energy storage

Stretchable Supercapacitor with Adjustable Volumetric Capacitance Based on 3D Interdigital Electrodes

Stretchable Supercapacitors as Emergent Energy Storage Units for Health Monitoring Bioelectronics

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