Stretchable all-solid-state supercapacitors based on highly conductive polypyrrole-coated graphene foam

Ren, Jing; Ren, Rui-Peng; Lv, Yongkang

doi:10.1016/j.cej.2018.05.075

Cited by 88 publications

(36 citation statements)

References 57 publications

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“…Electrochemical Characterization of Single Electrodes: The specific capacity of the electrodes in a three-electrode cell was calculated according to /3.6 m = ∆ C I t m (5) where C m (mAh g −1 ) is the specific mass capacity, I (A) is the current, Δt (s) is the discharge time, and m (g) is the weight of electrodes, respectively /3.6 A = ∆ C I t S (6) where C A (mAh cm −2 ) is the specific areal capacity, I (A) is the current, Δt (s) is the discharge time, and S (cm 2 ) is the area of electrodes, respectively. The specific capacitance of the electrodes in a three-electrode cell was calculated according to / m ′ = ∆ C I t mU (7) where C′ m (F g −1 ) is the specific mass capacitance, I (A) is the current, Δt (s) is the discharge time, m (g) is the weight of electrodes, and U (V) is the operating voltage window, respectively / A ′ = ∆ C I t SU (8) where C′ A (F cm −2 ) is the specific areal capacitance, I (A) is the current, Δt (s) is the discharge time, S (cm 2 ) is the area of electrodes, and U (V) is the operating voltage window, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, they can be classified into two types. The first type consists of electrodes with stretchable materials as the substrates, such as polydimethylsiloxane (PDMS), [5][6][7] polyurethane (PU), [8] silicone rubber (Ecoflex), [9] and poly3,4-eth ylenedioxythiophene:polystyrenesulfonate (PEDOT:PSS). [10][11][12][13][14] However, these stretchable supercapacitors are subject to the following drawbacks: airtightness, high resistances, low capacitances, and poor stretching performances.…”

Section: Introductionmentioning

confidence: 99%

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Making Stretchable Hybrid Supercapacitors by Knitting Non‐Stretchable Metal Fibers

Shao

Zhang

et al. 2020

Adv Funct Materials

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To obtain supercapacitors for wearable electronic devices, highly conductive stretchable electrode substrates with excellent tensile recovery are required. However, the simultaneous realization of the above mentioned characteristics is difficult. In this study, tough stainless‐steel fibers (SSFs) are employed as the substrates for knitting into stainless‐steel meshes (SSMs), for the fabrication of textile electrodes with typical 2D‐interconnected networks. The obtained knitted networks can transform the angular elasticity of SSFs into the stretchability of the textile electrodes. The electrodes based on the SSM substrates can be obtained via the in situ growth of NiCo2S4 nanosheets covered by CoS2 nanowires, which exhibit a high specific capacity, high rate capability, and excellent cycling stability. Moreover, the first stretchable solid‐state hybrid supercapacitors based on SSM display excellent performances with respect to a high energy density (60.2 Wh kg−1 at 800 W kg−1), remarkable tensile recovery (≤40% elongation), and high stability (≈76.4% capacity retention at 30% strain for 1000 stretching cycles). The highly stretchable supercapacitor is sewn on the elbow of a garment to drive a light‐emitting diode, and it maintains a high performance with respect to the repetitive process of bending and straightening, thus demonstrating the high applicability of the designed SSMs to wearable electronics.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Making Stretchable Hybrid Supercapacitors by Knitting Non‐Stretchable Metal Fibers

Shao

Zhang

et al. 2020

Adv Funct Materials

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“…For instance, Ren et al. have reported a flexible supercapacitor based on polypyrrole‐coated graphene foam with a stretchability of 50% . Li et al.…”

Section: Introductionmentioning

confidence: 99%

Blueberry‐Peel‐Derived Porous Carbon for High‐Performance Supercapacitors: The Effect of N‐Doping and Activation

Zhong

2020

ChemistrySelect

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Nitrogen-doped (N-doped) activated porous carbon has been successfully prepared, using blueberry peel (BP) as a carbon source and melamine as a nitrogen source through a simple and effective carbonization and activation process. The obtained ABP-1.5-700 (ABP-x-y, ABP: blueberry peel derived activated porous carbon; x: BP/melamine mass ratio; y: carbonization temperature), with a nitrogen doping content of 8.29 at % presented a maximum specific capacitance of 324.3 F g À 1 at a current density of 1 A g À 1 in 6 M potassium hydroxide (KOH) aqueous electrolyte. It also showed an excellent cycle stability about 99.9% retention after 20000 charge-discharge cycles. The assembled ABP-1.5-700-based symmetric capacitor displayed the value of the specific capacitance was 75 F g À 1 at 1 A g À 1 with a maximum energy density of 13.78 Wh kg À 1 and a power density of 661.25 W kg À 1 (0-1.15 V) in 6 M KOH electrolyte solution. The results showed that the porous carbon derived from blueberry peel presented a good potential for high performance supercapacitors.

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“…In consequence, it has been observed an increasing demand for lightweight and flexible devices characterized by high conductivity level, thermal stability and negligible degradation under repeated use [9]. One of the most important applications for wearable devices refers to the development of flexible storage devices (flexible supercapacitors) [10] with characteristic high-power density, long cycling life and fast charge-discharge rate [1,2,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…As an alternative, carbon nanotubes represent other important class of materials for use as EDLC supports, with advantages relative to their simple functionalization [13]. In terms of candidates for use as pseudocapacitors, polypyrrole has been considered an important material for flexible supercapacitors due to its high conductivity and chemical stability provided by chemically synthesized polymeric chains on flexible substrates [11,13,26,[28][29][30]. The adequate covering of cotton yarns by carbon derivatives (carbon nanotubes-CNT and graphene) followed by chemical polymerization of conducting polymers renders flexible materials with improved properties for energy storage applications [24,[31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Wearable supercapacitors based on graphene nanoplatelets/carbon nanotubes/polypyrrole composites on cotton yarns electrodes

Lima

Oliveira

2019

SN Appl. Sci.

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The development of highly conductive, flexible, mechanical reinforced and chemically modified cotton yarns for electrodes of supercapacitors represents an important advance in the energy storage devices applied in wearable electronics. The production of carbon-based conductive layers as supports for chemical polymerization of active polymeric materials (such as polypyrrole) is an important strategy that associates the high electrical double-layer capacitance of the carbon derivatives (carbon nanotubes and graphene nanoplatelets) and the pseudocapacitance of the polypyrrole in truly flexible devices with improved electrochemical response-high capacitance. These properties are affected by relative concentration of graphene nanoplatelets in carbon complexes due to the variation in overall conductivity of electrodes (in consequence of low aggregation degree and available surface area) and the electrochemical properties of the resulting devices that reaches capacitance in order of 45.5 F g −1 with a capacitive retention of 70% after 2000 cycles of use. These promising results open possibilities for new systems in wearable electronics.

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Stretchable all-solid-state supercapacitors based on highly conductive polypyrrole-coated graphene foam

Cited by 88 publications

References 57 publications

Making Stretchable Hybrid Supercapacitors by Knitting Non‐Stretchable Metal Fibers

Making Stretchable Hybrid Supercapacitors by Knitting Non‐Stretchable Metal Fibers

Blueberry‐Peel‐Derived Porous Carbon for High‐Performance Supercapacitors: The Effect of N‐Doping and Activation

Wearable supercapacitors based on graphene nanoplatelets/carbon nanotubes/polypyrrole composites on cotton yarns electrodes

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