Freestanding polypyrrole/carbon nanotube electrodes with high mass loading for robust flexible supercapacitors

Wang, Songjie; Liang, Yongyin; Zhuo, Wenchen; Lei, Hang; Javed, Muhammad Sufyan; Liu, Botian; Wang, Zilong; Mai, Wenjie

doi:10.1039/d0qm00649a

Cited by 28 publications

(21 citation statements)

References 37 publications

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Section: Resultsmentioning

confidence: 99%

“…The high capacitance and the wide potential window of the device lead to an outstanding energy density of 211.4 μW h cm –2 (7.28 W h Kg –1 ) corresponding to a power density of 1 mW cm –2 (34.48 W kg –1 ), and a high power density of 5 mW cm –2 (172.4 W kg –1 ) at an energy density of 149.9 μW h cm –2 (5.16 W h kg –1 ) (Figure S22b, Supporting Information). Figure 7c and Table S7 in the Supporting Information further compare the overall energy storage performance of the as‐prepared device with those of some representative flexible solid‐state SCs based on carbon materials or conductive polymers, i.e., PPy/CNT, [ 87 ] NF/rGO/PPy, [ 33 ] rGO/PEDOT/PANI, [ 1 ] cellulose/rGO/Ag/Fe 2 O 3 , [ 88 ] PEDOT:PSS/MoS 2 , [ 89 ] rGO/MoO 2 /carbon textile, [ 90 ] ACFC/PANI/CNT/PANI, [ 91 ] and ANFs/MWCNTs/PANI. [ 63 ] It is concluded that the energy and power densities of our device are superior to the most of advanced flexible SCs reported previously in literatures.…”

Section: Resultsmentioning

confidence: 99%

“…Notably, owing to the unique 3D helical morphology of CNC (the inset 2 of Figure 2b), the adjacent CNCs are in touch with each other via special point contact, which is distinguishing from the face contact between adjacent graphene sheets [ 32,33 ] and line contact between adjacent CNTs. [ 34,35 ] In contrast to the face and line contacts, the point contact between CNCs effectively prevents the agglomeration of CNCs [ 36,37 ] and consequently enhances the specific surface area [ 38 ] for fast transfer of electrolyte ions. In order to highlight the advantages of the unique 3D helical structure of CNCs, we also prepared (GO/PIL)‐1L and (CNT/PIL)‐1L as control samples by the same method, and recorded the morphologies of GO side (Figure S4a, Supporting Information) and CNT side (Figure S4b, Supporting Information), respectively.…”

Section: Resultsmentioning

confidence: 99%

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Flexible and Alternately Layered High‐Loading Film Electrode based on 3D Carbon Nanocoils and PEDOT:PSS for High‐Energy‐Density Supercapacitor

Huang

Zhao

Cong

et al. 2022

Adv Funct Materials

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The development of flexible carbon‐based film electrodes with high loading and sufficient electron/ion transport channels is of great significance but still challenging. Herein, a flexible high‐loading (over 15 mg cm–2) film with 3D hierarchical pores is prepared by an alternate deposition of carbon nanocoils (CNCs) and poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The unique alternate architecture of CNC/PEDOT:PSS bilayers possesses porous structure constructed by interconnected CNCs, which serves as transfer channels and storage chambers of ions. Meanwhile, the PEDOT:PSS layers anchoring CNCs function as not only the cement to ensure the stability of the film structure but also the current collectors to improve electron transfer kinetics between interlayers. The film electrode shows excellent flexibility and electrochemical properties. It delivers a high areal capacitance of 1402.5 mF cm–2 at 0.25 mA cm–2 and a superior stability even at an extremely high current density of 50 mA cm–2 after 10 000 cycles. The corresponding solid‐state supercapacitor has great energy storage ability and steady capacitance response under various deformation. The device achieves a superb energy density of 211 μW h cm–2 with a wide potential window of 2 V. This strategy paves a road for the controllable fabrication of high‐performance flexible electrodes and supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Flexible and Alternately Layered High‐Loading Film Electrode based on 3D Carbon Nanocoils and PEDOT:PSS for High‐Energy‐Density Supercapacitor

Huang

Zhao

Cong

et al. 2022

Adv Funct Materials

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“…Recently, application of composites based on conducting polymers and carbon nanostructures for heavy metal sensing has been reviewed. [95] Such composites could also be used as electroactive materials in supercapacitors [96][97][98][99] and electrocatalysts in biologically-active compounds determination. [100][101][102]…”

Section: Discussionmentioning

confidence: 99%

Oxidized MWCNTs as an Oxidizing Agent and Dopant in MWCNT@Polypyrrole Composite Formation**

et al. 2021

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A new approach to the formation of composites of carbon nanotubes and polypyrrole (PPy) is proposed. Oxidized multi‐walled carbon nanotubes (ox‐MWCNTs) are used as oxidation agents in pyrrole polymerization. The polymeric phase is deposited both at the surface of the carbon nanotube to form a core‐shell structure and in the empty spaces of the MWCNT network. Each form of the polypyrrole phase exhibits different electrochemical properties. PPy deposited directly at the carbon nanotube surface as a uniform and dense layer is oxidized at less positive potentials, compared to the polymeric material deposited in the pores of the nanotube network. MWCNTs with anions incorporated into structural defects formed during their oxidation in a piranha solution also act as dopants of the oxidized form of PPy. The polymeric film deposited directly at the ox‐MWCNT surface is in its oxidized state. The redox processes involving this part of the PPy film are accompanied by the transport of cations of the supporting electrolyte. The charge transfer between ox‐MWCNTs and the deposited PPy film is confirmed by the results of the theoretical calculations of the energy states at the carbon nanotube and polypyrrole interface. A neutral PPy film located in layers remote from the surface of the nanotube is oxidized at more positive potentials. The oxidation of PPy located in the pores of the ox‐MWCNT network results in a broad voltammetric peak formation.

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“…Tremendous studies have exploring CNTs based fiber SCs corresponding to the fibrous structure nature of CNTs [102,103]. Other electroactive materials have also been exploded to compose with CNTs to fabricate fibrous structure for textile SCs and improve the electrochemical performance [104][105][106].…”

Section: Carbon Nanotubes Electrodes For Wscsmentioning

confidence: 99%

Soft materials for wearable supercapacitors

Jiang¹,

Liu²,

Wang³

et al. 2021

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Along with the experienced rapid progress of wearable and portable electronic devices including electrical sensors, flexible displays, and health monitors, there is an ever-growing demand for wearable power sources. Supercapacitors as a new kind of energy storage device have received considerable attention for decades due to their high-power density, excellent cycling stability and easy fabrication. To fulfill the demand of wearable power sources, wearable supercapacitors are also further developed and studied. Newly electrode materials which play a significant role in

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Freestanding polypyrrole/carbon nanotube electrodes with high mass loading for robust flexible supercapacitors

Abstract: To meet the increasing requirement of flexible energy storage devices, it is critical to develop an electrode with commercial-level mass loading of active material for supercapacitors. Herein, we fabricated a...

Cited by 28 publications

References 37 publications

Flexible and Alternately Layered High‐Loading Film Electrode based on 3D Carbon Nanocoils and PEDOT:PSS for High‐Energy‐Density Supercapacitor

Flexible and Alternately Layered High‐Loading Film Electrode based on 3D Carbon Nanocoils and PEDOT:PSS for High‐Energy‐Density Supercapacitor

Oxidized MWCNTs as an Oxidizing Agent and Dopant in MWCNT@Polypyrrole Composite Formation**

Soft materials for wearable supercapacitors

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