High performance porous carbon through hard–soft dual templates for supercapacitor electrodes

Chen, Xiang Ying; Chen, Chong; Zhang, Zhong Jie; Xie, Dong

doi:10.1039/c3ta10841d

Cited by 61 publications

(29 citation statements)

References 19 publications

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“…[1][2] The key part of a supercapacitor is the electrode material, which predominantly depends the charge storage performance. [5][6][7][8][9][10] During the past several years, various carbon materials, including activated carbon, [11][12][13] carbon nanotubes, [14][15][16] and graphene, [17][18][19][20] have been investigated for use in supercapacitors. Carbon-based materials are not only used in electrochemical double layer capacitors for charge storage, but also employed in pseudocapacitors for improving the conductivity.…”

Section: Introductionmentioning

confidence: 99%

CN foam loaded with few-layer graphene nanosheets for high-performance supercapacitor electrodes

Zhu

Liu

et al. 2015

J. Mater. Chem. A

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Three-dimensional porous carbon-based foams have recently attracted increasing interest owing to their exciting potential in various fields. Herein, hierarchical porous monoliths, CN foam loaded with free few-layer graphene nanosheets, have been prepared. In this method, graphene oxide sheets were firstly loaded on the usual melamine foam that was selected as raw material for CN framework. With a following annealing process in N2 atmosphere, melamine foam was transferred into CN foam; at the same time, graphene oxide sheets were transferred into reduced graphene oxide, forming reduced graphene oxide-CN composite. The loading density of graphene on CN framework can be tuned by the dosage of graphene oxide. The obtained composite monoliths exhibit excellent cycling performance and good rate capacity when used as pseudocapacitive electrode materials. At current density of 0.5 and 10 A/g, the optimized electrode exhibits areal specific capacitance of 1067 and 463 mF/cm 2 with excellent cycling stability. The excellent property can be attributed to the unique macropore structures that endow sufficient space available to interact with the electrolytes, and the pseudocapacitive contribution originated from the nitrogen and oxygen composition. This facile synthesis strategy and the good electrochemical properties suggest the synthesized CN-graphene composites are promising materials for supercapacitor application.Since Hulicova et al prepared nitrogen-doped carbon in 2005 by carbonization of melamine with the assistance of mica, 32, 33 melamine-based polymer such as melamine formaldehyde resine were often selected as raw or assistant

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Section: Introductionmentioning

confidence: 99%

CN foam loaded with few-layer graphene nanosheets for high-performance supercapacitor electrodes

Zhu

Liu

et al. 2015

J. Mater. Chem. A

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“…Therefore, the conductivity of CTF/PPy should be analyzed with the results of XRD, contact angle measurements, and EIS tests. In the case of O 1s in CTF and CTF/PPy, the spectra contain three peaks at 531.1 eV, 532.0 eV, and 533.2 eV, corresponding to CO, COC, and OCO, respectively . The O element on the surface of materials would increase the surface wettability of the material .…”

Section: Resultsmentioning

confidence: 95%

Carbonized thiourea formaldehyde resin blending polypyrrole hollow spheres composites with improved supercapacitor performances as electrodes

Jiang

Niu

et al. 2019

J of Applied Polymer Sci

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Thiourea formaldehyde resin has been condensation‐polymerized in the polypyrrole hollow spheres suspension to obtain TF/PPy. Then, TF/PPy has been carbonized at 750 °C to acquire CTF/PPy composites. Scanning electron microscope and transmission electron microscope images were used to observe the morphology of the samples, TGA, XRD, Raman, XPS, and BET were used to analyze the structure of the materials. The results show PPy was blended with the TF resin, and the obtained CTF/PPy exhibited improved supercapacitive performances compared with CTF. The specific capacitance of CTF/PPy is 226.8 F g−1 at the current density of 1 A g−1 according to GCD curves, much higher than that of CTF. More interestingly, the cycling retention of CTF/PPy electrode at the current density of 10 A g−1 is up to 120.2% after 10 000 cycles. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47816.

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“…It indicates that there are only C and O elements, not any other impurity in sample surface. Moreover, C1s spectrum is fitted to three functional groups (Figure B): sp 2 hybridized carbons CC (284.7 eV), nonoxygenated CC bond (285.6 eV), and carbonyl CO bond (288.7 eV) . O1s spectrum clearly displays four different chemical states (Figure C), which are CO in quinone type group at ≈531.7 eV, singly bonded oxygen (O) in CO group at ≈532.7 eV, carboxyl oxygen atoms at ≈533.7 eV, and surface adsorption state oxygen atom at ≈536.3 eV .…”

Section: Resultsmentioning

confidence: 99%

A 3D Carbon Foam Derived from Phenol Resin via CsCl Soft‐Templating Approach for High‐Performance Supercapacitor

et al. 2020

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Carbon with a 3D foam structure is synthesized by a one‐step strategy using low‐molecular‐weight phenolic resin as the precursor and CsCl as a salt template. Their electrochemical performance as electrodes is studied for symmetric supercapacitors. The distinct effect of CsCl addition amount on morphology, pore structure, electric conductivity, and electrochemical performance is further investigated. With appropriate CsCl addition amount, 3D carbon foam is harvested with abundant micropores and mesopores with a surface area beyond 1590 m2 g−1. It is tested as an electrode in a coin‐type symmetric supercapacitor with 6 m KOH and 1 m TEABF4/MeCN as the electrolyte. The 3D carbon foam electrode displays specific capacitance of 259.3 F g−1 in 6 m KOH and 127.9 F g−1 in 1 m TEABF4/MeCN at 0.5 A g−1. Notably, it exhibits high energy density of 27.7 W h kg−1 in 1 m TEABF4/MeCN. After 10 000 cycles, the specific capacitance remains at 96.9% in 6 m KOH, indicating good cycle stability. The superior performance of 3D carbon foam is attributed to larger surface area, higher electric conductivity, and unique 3D foam structure with sufficient 3D ion‐accessible channels. This work develops a simple, facile method to synthesize high‐performance supercapacitor electrode materials.

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High performance porous carbon through hard–soft dual templates for supercapacitor electrodes

Cited by 61 publications

References 19 publications

CN foam loaded with few-layer graphene nanosheets for high-performance supercapacitor electrodes

CN foam loaded with few-layer graphene nanosheets for high-performance supercapacitor electrodes

Carbonized thiourea formaldehyde resin blending polypyrrole hollow spheres composites with improved supercapacitor performances as electrodes

A 3D Carbon Foam Derived from Phenol Resin via CsCl Soft‐Templating Approach for High‐Performance Supercapacitor

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