Self-supported flexible supercapacitor based on carbon fibers covalently combined with monoaminophthalocyanine

Luo, Yan; Wu, Pengcheng; Li, Jiangwei; Yang, Shuangchun; Wu, Keliang; Wu, Jianning; Meng, Guihua; Liu, Zhiyong; Guo, Xuhong

doi:10.1016/j.cej.2019.123535

Cited by 16 publications

(12 citation statements)

References 51 publications

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“…36 According to C 1s XPS of AC-DAAQ (Figure 4c), the peak at 287.5 eV can be attributed to the C−N bonds. 37 The consumption of carboxyl groups and the formation of C−N bonds indicate that DAAQ molecules do not exist freely or physically adsorbed on the carbon fibers but are connected to the carbon skeleton by solid chemical bonds (amide bonds). 30 Figure S10 represents the C 1s XPS spectra of COFs and AC-COFs.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In addition, the intensity of carboxyl absorption peak of AC-DAAQ decreased obviously and the stretching vibration of C−N bond at 1267 cm −1 increased, indicating that DAAQ was covalently grafted onto AC surface through the CO−NH bond. 37 The atomic level construction of the AC-COFs is further investigated by 13 C cross-polarization magic angle spinning (CP-MAS) solid-state NMR spectroscopy. As shown in Figure S12, the presence of enamine carbon (145 ppm) and α-enamine carbon (110 ppm) signals indicates the formation of β-ketene amine-linked COFs.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The introduction of nitrogen atoms locally changes the electron density and further enhances the electronic properties and functions . According to C 1s XPS of AC-DAAQ (Figure c), the peak at 287.5 eV can be attributed to the C–N bonds . The consumption of carboxyl groups and the formation of C–N bonds indicate that DAAQ molecules do not exist freely or physically adsorbed on the carbon fibers but are connected to the carbon skeleton by solid chemical bonds (amide bonds) …”

Section: Resultsmentioning

confidence: 99%

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COF-Based Electrodes with Vertically Supported Tentacle Array for Ultrahigh Stability Flexible Energy Storage

Meng

et al. 2022

ACS Appl. Mater. Interfaces

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As an emerging porous crystal polymer, covalent organic frameworks (COFs) possess unique characteristics, such as high porosity, excellent stability, diverse topologies, designable open channels, and functional tunability. However, limited by the solid powder form, most COFs display low active site utilization and weak binding force with the current collector. In this pioneering research, we integrate redox-active COFs onto carbon fiber surfaces (AC-COFs) via strong covalent bridging. The 2,6diaminoanthraquinone (DAAQ) pillars embedded on the carbon fiber surface are the key to precisely controlling the growth direction of COFs. The obtained tentacle-like array vertically supported on the surface of the carbon fiber can effectively induce charge transfer and prevent COFs from aggregating/collapsing. The strong covalent coupling and increase of accessible active sites contributed to the high specific capacitance of AC-COFs electrode (1034 mF cm −2 ). In addition, the COF-based flexible electrode retains an initial capacitance of 98% after 20000 charge− discharge cycles. The flexible all-solid-state symmetric supercapacitor is assembled by PVA/H 2 SO 4 gel electrolyte with an areal capacitance of 715 mF cm −2 . Besides, a red LED can be easily powered by three-bending AC-COFs//AC-COFs devices. The innovative synthesis strategy opens up new opportunities to develop high-performance flexible energy storage devices based on COFs.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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COF-Based Electrodes with Vertically Supported Tentacle Array for Ultrahigh Stability Flexible Energy Storage

Meng

et al. 2022

ACS Appl. Mater. Interfaces

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“…As a result, the performance of the capacitor is severely limited by the influence of the current collector and the non‐conductive adhesive 15,16 . The electrochemical activity of certain materials makes it possible to serve as electrodes whilst showing preferred flexible current collector functions in flexible self‐supporting supercapacitors (FFSCs) 17–21 . CNTs are a kind of material with the typical electrical double‐layer electrodes in which ions travel between two electrodes without any chemical reaction during the charging and discharging process.…”

Section: Introductionmentioning

confidence: 99%

“…15,16 The electrochemical activity of certain materials makes it possible to serve as electrodes whilst showing preferred flexible current collector functions in flexible self-supporting supercapacitors (FFSCs). [17][18][19][20][21] CNTs are a kind of material with the typical electrical double-layer electrodes in which ions travel between two electrodes without any chemical reaction during the charging and discharging process. However, it is impossible to reach the satisfactory specific capacitance and energy density of capacitors if using CNT S alone.…”

Section: Introductionmentioning

confidence: 99%

Grape‐clustered polyaniline grafted with carbon nanotube woven film as a flexible electrode material for supercapacitors

Shi

et al. 2022

J of Applied Polymer Sci

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The continuously reinforced carbon nanotube woven film (CNWF) prepared via the floating catalytic chemical vapor deposition (FCCVD) was modified by mixed acid and vinyltrimethoxysilane (VTMS) respectively to obtain carbon nanotube woven film (CNWF@VTMS) grafted with CH 2 CH group. A series of novel self-supporting composite electrode materials (CNWF@VTMS/PANI) for supercapacitors were then prepared by in-situ chemical oxidative polymerization of aniline in the presence of the CNWF@VTMS film substrate as a conductive network framework. The results showed that CNWF@VTMS/PANI 14 flexible electrode with grape-clustered structure exhibited the highest specific capacitance of 531.3 F/g and the highest energy density of 26.5 Wh/kg at the current density of 1 A/g. It could maintain 75.1% of the initial value at a high current density of 10 A/g. The excellent electrochemical cycle and the structural stability have been confirmed on the condition of the higher capacitance retention of 96.6% after 2000 times of galvanostatic charge/discharge, and the almost unchanged electrochemical performances after 300 times of bending and twisting. Meanwhile, the stronger interfacial bonding between CNWF and PANI endowed a higher tensile strength of 129.2 MPa.

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Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

Sun,

Han,

Wang

et al. 2023

Adv Funct Materials

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The rapid developments of the Internet of Things (IoT) and portable electronic devices have created a growing demand for flexible electrochemical energy storage (EES) devices. Nevertheless, these flexible devices suffer from poor flexibility, low energy density, and poor dynamic stability of power output during deformation, limiting their practical applications. Carbon nanofibers (CNFs) with high conductivity, good flexibility, and large‐scale preparation are regarded as promising electrodes for flexible EES devices. Based on the issues of current flexible EES devices, this review presents various strategies from the design of CNFs‐based electrodes to the fabrication of devices and overviews their applications in various flexible metal ion/air batteries (Li/Na/K‐ion batteries, Li‐S batteries, metal–air batteries, and other novel secondary batteries) and supercapacitors. Finally, the remaining challenges and perspectives on the CNFs‐based flexible EES devices are proposed to provide guidance for the researchers concentrating on high‐performance flexible EES devices.

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Self-supported flexible supercapacitor based on carbon fibers covalently combined with monoaminophthalocyanine

Cited by 16 publications

References 51 publications

COF-Based Electrodes with Vertically Supported Tentacle Array for Ultrahigh Stability Flexible Energy Storage

COF-Based Electrodes with Vertically Supported Tentacle Array for Ultrahigh Stability Flexible Energy Storage

Grape‐clustered polyaniline grafted with carbon nanotube woven film as a flexible electrode material for supercapacitors

Advanced Carbons Nanofibers‐Based Electrodes for Flexible Energy Storage Devices

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