Synthesis of mesoporous graphitic carbon fibers with high performance for supercapacitor

Yan, Dong; Lin, Huiming; Zhou, Dan; Niu, Hao; Jin, Qumei; Qu, Fengyu

doi:10.1016/j.electacta.2015.01.152

Cited by 45 publications

(20 citation statements)

References 35 publications

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“…Carbon nanofibres (CNFs), which are relatively inexpensive, longer and more edges, defects or strained regions as active sites for electrochemical reaction as compared to carbon nanotubes (CNTs), have been considered as promising electrode materials for supercapacitors because of their extremely high length-to-diameter ratio, superior special surface area, high stiffness and tensile strength 18–22 . However, the low theoretical specific capacitance of CNFs limits their application in supercapacitors 23 .…”

Section: Introductionmentioning

confidence: 99%

High performance asymmetric supercapacitor based on Cobalt Nickle Iron-layered double hydroxide/carbon nanofibres and activated carbon

Wang

Sun

et al. 2017

Sci Rep

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A novel Cobalt Nickle Iron-layered double hydroxide/carbon nanofibres (CoNiFe-LDH/CNFs-0.5) composite was successfully fabricated through an easy in situ growth approach. The morphology and composition of the obtained materials were systematically investigated. When the two derived materials were used for supercapacitor electrodes, the CoNiFe-LDH/CNFs-0.5 composite displayed high specific surface area (114.2 m2 g−1), specific capacitance (1203 F g−1 at 1 A g−1) and rate capability (77.1% from 1 A g−1 to 10 A g−1), which were considerably higher than those of pure CoNiFe-LDH. Moreover, the specific capacitance of CoNiFe-LDH/CNFs-0.5 composite remained at 94.4% after 1000 cycles at 20 A g−1, suggesting excellent long-time cycle life. The asymmetric supercapacitor based on CoNiFe-LDH/CNFs-0.5 as a positive electrode and activated carbon as a negative electrode was manufactured and it exhibited a specific capacitance of 84.9 F g−1 at 1 A g−1 and a high energy density of 30.2 W h kg−1. More importantly, this device showed long-term cycling stability, with 82.7% capacity retention after 2000 cycles at 10 A g−1. Thus, this composite with outstanding electrochemical performance could be a promising electrode material for supercapacitors.

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Section: Introductionmentioning

confidence: 99%

High performance asymmetric supercapacitor based on Cobalt Nickle Iron-layered double hydroxide/carbon nanofibres and activated carbon

Wang

Sun

et al. 2017

Sci Rep

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“…The presence of micropores can effectively enhance the diffusion and mobility of the electrolyte ions to the interior of the electrode and increase the rate capability, whereas the mesopores can accommodate more electrolytes which can effectively enhance the specific capacitance. 40 , 41 …”

Section: Resultsmentioning

confidence: 99%

Hierarchical Porous Carbon Microfibers Derived from Tamarind Seed Coat for High-Energy Supercapacitor Application

et al. 2018

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The overwhelming interest in supercapacitors has led to the search for various carbonaceous materials, leading to hierarchical porous carbons. Herein, we report a natural biomass (tamarind seed)-based hierarchical porous carbon without any template and activated by a facile scheme. The tamarind seed coat-based hierarchical porous carbon possessed a unique configuration, making the material exhibit superior supercapacitor properties. A single carbon fiber hosting a distinctive micro- and mesoporous structure formed a connecting thread between the pores. This unique structure enabled high surface area and high capacitance. The highest surface area obtained by this method was 1702 m2 g–1, whereas the capacitance was 157 F g–1 in 6 M KOH. Further, an ionic liquid-based electrolyte revealed 78 F g–1 at a current density of 0.5 A g–1. Outstanding capacity retentions of 96 and 93% were obtained over 1000 cycles at a current density of 2 A g–1 for aqueous (6 M KOH) and ionic liquid (1-butyl 3-methyl imidazoliumbistrifluorosulfonylimide) electrolytes, respectively. The high charge-storage ability of the porous carbon microfibers (PCMFs) can be ascribed to the coexistence of micro- and mesopores. The power characteristics and the cyclic stability of PCMF materials were appealing in both electrolytes. The synthesis process described is amenable for large-scale applications with less complexity.

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“…In response to this, an alternative strategy to increasing the capacitance via enhancing graphitization degree of porous carbon materials was proposed, and several types of hierarchical graphitic carbons with well-controlled crystalline structure, large surface area, high porosity, high electric conductivity, and good chemical and electrochemical stability were developed [8][9][10][11][12][13][14]. For instance, Xie et al synthesized porous graphitic carbon materials with enhanced electrochemical performances by improving graphitization degree using Fe and Ni catalysts [15].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Hierarchically Porous Graphitic Carbon Spheres and Their Applications in Supercapacitors and Dye Adsorption

Wang

et al. 2018

Preprint

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Hierarchical micro-/mesoporous graphitic carbon spheres (HGCS) with a uniform diameter of ~0.35 μm were synthesized by Fe-catalyzed graphitization of amorphous carbon spheres resultant from hydrothermal carbonization. The HGCS resultant from 3 h at 900 °C with 1.0 wt% Fe catalyst had high graphitization degree and surface area as high as 564 m2/g. They also exhibited high specific capacitance of 140 F/g at 0.2 A/g, good electrochemical stability with 94% capacitance retention after consecutive 2500 cycles. The graphitization degree of the HGCS contributed about 60% of their specific capacitance, and their specific capacitance per unit surface area was as high as 0.2 F/m2 which was much higher than in the most cases of porous amorphous carbon materials reported before. In addition, the HGCS showed a high adsorption capacity of 182.8 mg/g for methylene blue (MB), which was 12 times as high as that in the case of carbon spheres before graphitization.

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Synthesis of mesoporous graphitic carbon fibers with high performance for supercapacitor

Cited by 45 publications

References 35 publications

High performance asymmetric supercapacitor based on Cobalt Nickle Iron-layered double hydroxide/carbon nanofibres and activated carbon

High performance asymmetric supercapacitor based on Cobalt Nickle Iron-layered double hydroxide/carbon nanofibres and activated carbon

Hierarchical Porous Carbon Microfibers Derived from Tamarind Seed Coat for High-Energy Supercapacitor Application

Preparation of Hierarchically Porous Graphitic Carbon Spheres and Their Applications in Supercapacitors and Dye Adsorption

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