Fully flexible, lightweight, high performance all-solid-state supercapacitor based on 3-Dimensional-graphene/graphite-paper

Ramadoss, Ananthankumar; Yoon, Ki‐Young; Kwak, Myung-Jun; Kim, Sun‐I; Ryu, Seung‐Tak; Jang, Ji‐Hyun

doi:10.1016/j.jpowsour.2016.10.091

Cited by 252 publications

(113 citation statements)

References 33 publications

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“…Significantly, areal capacitance is 736 mF cm −2 at 1 mA cm −2 and maintains 505 mF cm −2 at 20 mA cm −2 (Figure S29d, Supporting Information). The gravimetric capacitance (260 F g −1 at 0.5 A g −1 ) and areal capacitance (736 mF cm −2 at 1 mA cm −2 ) are higher than those of many other carbon materials reported recently (Table S5, Supporting Information) 56–64. It is also noted that the specific capacitance of C‐AL/CNF‐5 (260 F g −1 at 0.5 A g −1 ) is higher than that of C‐CNF (Figure S30, Supporting Information), which may result from the higher electrical conductivity and heteroatom (S and N) content of C‐AL/CNF‐5 (Table S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 77%

Wood‐Derived Lightweight and Elastic Carbon Aerogel for Pressure Sensing and Energy Storage

Chen

Zhuo

et al. 2020

Adv Funct Materials

220

142

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Lightweight and elastic carbon materials have attracted great interest in pressure sensing and energy storage for wearable devices and electronic skins. Wood is the most abundant renewable resource and offers green and sustainable raw materials for fabricating lightweight carbon materials. Herein, a facile and sustainable strategy is proposed to fabricate a wood-derived elastic carbon aerogel with tracheid-like texture from cellulose nanofibers (CNFs) and lignin. The flexible CNFs entangle and assemble into an interconnected framework, while lignin with high thermal stability and favorable stiffness prevents the framework from severe structural shrinkage during annealing. This strategy leads to an ordered tracheid-like structure and significantly reduces the thermal deformation of the CNFs network, producing a lightweight and elastic carbon aerogel. The wood-derived carbon aerogel exhibits excellent mechanical performance, including high compressibility (up to 95% strain) and fatigue resistance. It also reveals high sensitivity at a wide working pressure range of 0-16.89 kPa and can detect human biosignals accurately. Moreover, the carbon aerogel can be assembled into a flexible and free-standing all-solid-state symmetric supercapacitor that reveals satisfactory electrochemical performance and mechanical flexibility. These features make the wood-derived carbon aerogel highly attractive for pressure sensor and flexible electrode applications.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201910292. important applications in wearable sensors, electronic skins, and flexible energy storage devices. Although carbon aerogels with good mechanical performances can be achieved from nanocarbon unites, their carbon precursors are nonrenewable, and the synthesis process of CNT, graphene, or their aerogels is high-cost and complicated.Considering the natural abundance, renewability, environmental friendliness, and low cost, biomass has been regarded as a renewable and sustainable carbon precursor for fabricating carbon aerogels. Up to now, several biomass-derived carbon aerogels have been successfully developed from gelatin, [16] winter melon, [17] protein, [18] bacterial cellulose, [19] and raw cotton. [20] However, those carbon aerogels show poor compressibility, elasticity, and fatigue resistance owing to the intrinsic random porous architecture and severe volume shrinkage at annealing or carbonization. Wood, as one of the most abundant biomass resources, demonstrates hierarchical tracheid structure that is composed of CNFs and amorphous matrix (lignin and hemicelluloses). [21] Owing to the compact structure (large amounts of additives and various interaction among tracheids or CNFs), natural wood is rigid and the tracheids are hard to be compressed and easily collapsed. Therefore, fabricating compressible and elastic conductive carbon aerogel from original wood tracheids is challenging. To solve this problem, Hu et al. [22] put forward a "top-down" stra...

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Section: Resultsmentioning

confidence: 77%

Wood‐Derived Lightweight and Elastic Carbon Aerogel for Pressure Sensing and Energy Storage

Chen

Zhuo

et al. 2020

Adv Funct Materials

220

142

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“…The corresponding Ragone plot derived from the GCD profiles is shown in Figure 7D, which reveals that this device delivers a high energy density of 15.0 Wh kg −1 at a power density of 500 W kg −1 , and 11.7 Wh kg −1 even at the high power density of 10 000 W kg −1 , superior or comparable to those previously reported carbon-based flexible symmetric devices, such as wheat straw-derived porous carbon-based capacitors, 45 coal tar pitch-derived porous carbon-based capacitors, 32 and 3D graphene-based capacitors. 46 As depicted in Figure 7E, a semicircle in the highfrequency region and a steep line in the low-frequency region can be observed in the Nyquist plot of the BHPC-700-based flexible all-solid-state supercapacitor. The R s , R ct , and ESR values were calculated to be 2.7, 0.9, and 4.3 Ω, respectively.…”

Section: Capacitive Behaviormentioning

confidence: 84%

From basil seed to flexible supercapacitors: Green synthesis of heteroatom‐enriched porous carbon by self‐gelation strategy

et al. 2020

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Summary Basil seed‐derived multi‐heteroatom–doped porous carbons (BHPCs) are successfully synthesized by a facile gelation, followed by a moderate gel water/KOH coactivation process. The BHPC‐700 prepared at a relatively low KOH loading and activation temperature possesses large specific surface area (1178.3 m2 g−1), well‐defined hierarchical micro/meso porosity, and rich self‐doping heteroatom functionalities (13.08 at% of oxygen, nitrogen, phosphorous, and sulfur). Electrochemical tests demonstrate that the BHPC‐700–based electrode achieves an ultrahigh specific capacitance (464 F g−1 at 0.5 A g−1), outstanding rate performance (retaining 73.3% capacitance at 50 A g−1), and superior cyclic stability (96.8% capacitance retention over 5000 cycles). Furthermore, the BHPC‐700 electrodes are assembled into all‐solid‐state symmetrical supercapacitors. The as‐assembled device gives a high energy density of 15.0 Wh kg−1 at a power density of 500 W kg−1 and remarkable flexibility, demonstrating great application prospects in the area of sustainable portable electronics.

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“…According to the GCD profiles, the area specific capacitances were calculated using the following equation

C_{s} = \frac{I Δ t}{s Δ V}

where

C_{s}

is the specific capacitance (mF cm −2 ), I is the applied current, Δ V is the voltage window, s is the area of the electrode,

Δ t

is the discharge time, and ΔV/Δt is the slope of the discharge curve after the IR drop.…”

Section: Methodsmentioning

confidence: 99%

Flexible Planar‐Integrated Micro‐Supercapacitors from Electrochemically Exfoliated Graphene as Advanced Electrodes Prepared by Flash Foam–Assisted Stamp Technique on Paper

Shi

Xiang

et al. 2019

Energy Tech

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One of the key challenges of integrated energy storage devices is to develop a simple, low‐cost, and environmental‐friendly planar patterning technology. Herein, an ingenious and feasible laser‐engraved flash foam–assisted stamp technique of preparing flexible paper‐based planar‐integrated micro‐supercapacitors based on interdigital electrodes of self‐depositing electrochemically exfoliated graphene is proposed. The as‐synthesized flexible paper‐based planar‐integrated graphene micro‐supercapacitors exhibit excellent electrochemical performances with a remarkable area‐specific capacitance of 3.1 mF cm−2, and an excellent cycling stability in that capacitance retention reaches 95.8% even after 10 000 cycles. Furthermore, the paper‐based graphene micro‐supercapacitors are bent at different angles without significant electrochemical performance loss, and thus have outstanding mechanical flexibility. Therefore, such flexible paper‐based planar‐integrated graphene micro‐supercapacitors are expected to be applied in flexible wearable and portable electronics.

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Fully flexible, lightweight, high performance all-solid-state supercapacitor based on 3-Dimensional-graphene/graphite-paper

Cited by 252 publications

References 33 publications

Wood‐Derived Lightweight and Elastic Carbon Aerogel for Pressure Sensing and Energy Storage

Wood‐Derived Lightweight and Elastic Carbon Aerogel for Pressure Sensing and Energy Storage

From basil seed to flexible supercapacitors: Green synthesis of heteroatom‐enriched porous carbon by self‐gelation strategy

Flexible Planar‐Integrated Micro‐Supercapacitors from Electrochemically Exfoliated Graphene as Advanced Electrodes Prepared by Flash Foam–Assisted Stamp Technique on Paper

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