Freestanding, Hydrophilic Nitrogen‐Doped Carbon Foams for Highly Compressible All Solid‐State Supercapacitors

Xiao, Kang; Ding, Liang‐Xin; Liu, Guoxue; Chen, Hongbin; Wang, Haihui

doi:10.1002/adma.201601125

Cited by 297 publications

(193 citation statements)

References 40 publications

(32 reference statements)

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“…The performance of the CSC experiences slightly improvement with the increasing compressive strains due to the shorten length between CNT–PDMS sponge conductive scaffold and improvement of the rate capability. Direct comparison between this work and several of the compressible supercapacitors developed by pioneers in field shows that our CSC owns desirable performance to meet the demands of various applications (Table S2, Supporting Information) …”

Section: Resultsmentioning

confidence: 99%

“…Additionally, in order to power wearable devices and compose a self‐powered compressible system, energy storage devices, which could maintain performance under large strains, should be further discussed . Considering the fact that conventional solid‐state supercapacitors composed of carbon‐based materials, conducting polymers, and their composites are lack of compressibility, thus the appearance of the advanced supercapacitors called compressible supercapacitors (CSCs) paves the way for practical applications with long cycle life, great stability, and compatibility . The sponge‐like structure with high porosity is a remarkable configuration for CSC electrode, such as 3D graphene, aerogel, and carbon nanotubes (CNTs) .…”

Section: Introductionmentioning

confidence: 99%

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Highly Compressible Integrated Supercapacitor–Piezoresistance‐Sensor System with CNT–PDMS Sponge for Health Monitoring

Song

Chen

et al. 2017

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276

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Rapid improvement of wearable electronics stimulates the demands for the matched functional devices and energy storage devices. Meanwhile, wearable microsystem requires every parts possessing high compressibility to accommodate large-scale mechanical deformations and complex conditions. In this work, a general carbon nanotube-polydimethylsiloxane (CNT-PDMS) sponge electrode is fabricated as the elementary component of the compressible system. CNT-PDMS sponge performs high sensitivity as a piezoresistance sensor, which is capable of detecting stress repeatedly and owns great electrochemical performance as a compressible supercapacitor which maintains stably under compressive strains, respectively. Assembled with the piezoresistance sensor and the compressible supercapacitor, such highly compressible integrated system can power and modulate the low-power electronic devices reliably. More importantly, attached to the epidermal skin or clothes, it can detect human motions, ranging from speech recognition to breathing record, thus showing feasibility in real-time health monitor and human-machine interfaces.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Compressible Integrated Supercapacitor–Piezoresistance‐Sensor System with CNT–PDMS Sponge for Health Monitoring

Song

Chen

et al. 2017

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276

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“…However, global fossil energy depletion demands the development of newer energy and energy storage systems. [3,4] Supercapacitors (SCs) were once considered as a replacement of LIBs due to their high power density, excellent cycling stability, and high level of safety, [5][6][7][8] but the energy density of SCs contact between the nanosheets and electrolyte ions in SCs. [2] Nevertheless, the problems of low power density, short cycle life, and safety risk of LIBs have not been effectively solved, which hinders their further development.…”

Section: Introductionmentioning

confidence: 99%

MXene‐Reduced Graphene Oxide Aerogel for Aqueous Zinc‐Ion Hybrid Supercapacitor with Ultralong Cycle Life

Wang

Guo

et al. 2019

Adv Elect Materials

283

152

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is much smaller for medium-and largeenergy storage systems. [9][10][11] Fortunately, constructing hybrid SCs (HSCs) that combine the merits of battery and SC with battery-type electrodes and capacitor-type electrodes is an intelligent way to improve the energy density of SCs. [12] The Li-ion and Na-ion-based HSCs that attempted to further improve the energy density of SCs have made certain progress, but these HSCs generally adopted organic electrolyte, which leads to serious safety issues. [13][14][15][16] Although Li-ion and Na-ion-based HSCs that adopted aqueous electrolyte were seldom reported, the battery-type electrode materials for Li-ion or Na-ion storage in aqueous electrolyte generally suffer from low capacity. [17][18][19] Thus, it is necessary to construct new HSCs based on other metal ion in aqueous electrolyte. Recently, more and more research attentions have been turned to aqueous zinc-ion batteries (ZIBs). While the short cycle life is the biggest drawback of aqueous ZIBs, the advantages of aqueous ZIBs-such as high capacity, high energy density, and high level of safety-cannot be ignored. [20][21][22] These provide us a new route for assembling aqueous Zinc-ion HSCs (ZHSCs) with zinc metal battery-type electrodes and suitable capacitor-type electrodes. In this respect, activated carbon (AC) as a common electrode material for HSCs was applied in recent reports. [23][24][25] However, AC-based electrodes for HSCs have several defects: i) AC-based electrodes require binder, conductive-additive and metal current collector, which increases the total weight, and thus decrease the final specific capacitance of the devices. ii) AC-based electrodes that store energy by using the energy storage mechanism of electrochemical double-layer capacitors have limited capacities. Therefore, it is necessary to develop new capacitor-type electrodes without binder and conductive-additive.MXene is a new group of 2D materials. Since the MXene was first reported in 2011, [26] it has attracted much attention due to the excellent metallic electrical conductivity, hydrophilic surface, and especially the pseudocapacitance energy storage mechanism in the field of SCs. [27][28][29][30][31] These features make MXene particularly attractive for capacitor-type electrodes of the ZHSCs. However, similar to graphene, adjacent MXene nanosheets are prone to aggregation and self-restacking under the van der Waals interaction, [32] which reduces their interlayer spacing, limits the electrolyte ions transport and hinders the sufficient Although current energy storage devices are limited by their own shortcomings, their merits such as superior power density and cycling stability for supercapacitors (SCs), and high energy density for batteries cannot be ignored either. Constructing hybrid SCs (HSCs) with capacitor-type electrodes and battery-type electrodes can combine the advantages of SCs and batteries. Herein, a zinc-ion HSC (ZHSC) is fabricated with a porous 3D MXene (Ti 3 C 2 T x )-reduced graphene oxide aerogel cathode and zinc foil an...

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“…From the GCD curves, the C a was calculated by Eq. (1). Impressively, at a current densities of 5, 10, 20, 30, Figure 6(a) illustrates the CVs gathered from PPy, NiMoO 4 and NiMoO 4 /PPy electrodes, which were acquired at a scan rate of 50 mV/s.…”

Section: 29mentioning

confidence: 99%

“…Supercapacitors are classi¯ed into electrical double layer capacitors and pseudocapacitors based on the charge storage mechanisms. 1,2 Pseudocapactive-type electrode materials such as transition metal oxides and conducting polymers are able to generate high energy density compared with that transmitted by electrical double layer capacitors made of carbon-based active materials. 3,4 On one hand, it has been discovered that transition metal oxides are superior active materials due to the diversity of oxidation states owned by them for charge transfer.…”

Section: Introductionmentioning

confidence: 99%

Rationally Designed Three-Dimensional NiMoO₄/Polypyrrole Core–Shell Nanostructures for High-Performance Supercapacitors

Chen

Wang

Ning

2017

NANO

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Electrodes of rationally designed composite nanostructures can o®er many opportunities for the enhanced performance in electrochemical energy storage. This paper attempts to illustrate the design and production of NiMoO 4 /polypyrrole core-shell nanostructures on nickel foam to be used in supercapacitor via a facile hydrothermal and electrodeposition process. It has been veri¯ed that this novel nanoscale morphology has outstanding capacitive performances. While employed as electrodes in supercapacitors, the composite nanostructures showed remarkable electrochemical performances with a great areal capacitance (3.2 F/cm 2 at a current density of 5 mA/cm 2 ), and a signi¯cant cycle stability (80% capacitance retention after 1000 cycles). The above results reveal that the composite nanostructures may be a likely electrode material for high-performance electrochemical capacitors.

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Freestanding, Hydrophilic Nitrogen‐Doped Carbon Foams for Highly Compressible All Solid‐State Supercapacitors

Cited by 297 publications

References 40 publications

Highly Compressible Integrated Supercapacitor–Piezoresistance‐Sensor System with CNT–PDMS Sponge for Health Monitoring

Highly Compressible Integrated Supercapacitor–Piezoresistance‐Sensor System with CNT–PDMS Sponge for Health Monitoring

MXene‐Reduced Graphene Oxide Aerogel for Aqueous Zinc‐Ion Hybrid Supercapacitor with Ultralong Cycle Life

Rationally Designed Three-Dimensional NiMoO₄/Polypyrrole Core–Shell Nanostructures for High-Performance Supercapacitors

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Freestanding, Hydrophilic Nitrogen‐Doped Carbon Foams for Highly Compressible All Solid‐State Supercapacitors

Cited by 297 publications

References 40 publications

Highly Compressible Integrated Supercapacitor–Piezoresistance‐Sensor System with CNT–PDMS Sponge for Health Monitoring

Highly Compressible Integrated Supercapacitor–Piezoresistance‐Sensor System with CNT–PDMS Sponge for Health Monitoring

MXene‐Reduced Graphene Oxide Aerogel for Aqueous Zinc‐Ion Hybrid Supercapacitor with Ultralong Cycle Life

Rationally Designed Three-Dimensional NiMoO4/Polypyrrole Core–Shell Nanostructures for High-Performance Supercapacitors

Contact Info

Product

Resources

About

Rationally Designed Three-Dimensional NiMoO₄/Polypyrrole Core–Shell Nanostructures for High-Performance Supercapacitors