Mesoporous carbon spheres grafted with carbon nanofibers for high-rate electric double layer capacitors

Huang, Cheng; Hsu, Chun Han; Kuo, Ping Lin; Hsieh, Chien Te; Teng, Hsisheng

doi:10.1016/j.carbon.2010.10.053

Cited by 127 publications

(68 citation statements)

References 43 publications

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“…The insert in (a) is the equivalent circuit. (b) is an enlarged view of (a) due to the contact interface (C c and R c ), a Warburg diffusion element attributable to the ion migration through the carbon film (Z W ), and the capacitance inside the pores, C d [59,60]. The Warburg element is given by…”

Section: Resultsmentioning

confidence: 99%

Binder-free activated carbon/carbon nanotube paper electrodes for use in supercapacitors

et al. 2011

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Novel inexpensive, light, flexible, and even rollup or wearable devices are required for multi-functional portable electronics and developing new versatile and flexible electrode materials as alternatives to the materials used in contemporary batteries and supercapacitors is a key challenge. Here, binder-free activated carbon (AC)/carbon nanotube (CNT) paper electrodes for use in advanced supercapacitors have been fabricated based on low-cost, industrial-grade aligned CNTs. By a two-step shearing strategy, aligned CNTs were dispersed into individual long CNTs, and then 90 wt%-99 wt% of AC powder was incorporated into the CNT pulp and the AC/CNT paper electrode was fabricated by deposition on a filter. The specific capacity, rate performance, and power density of the AC/CNT paper electrode were better than the corresponding values for an AC/acetylene black electrode. The capacity reached a maximum value of 267.6 F/g with a CNT loading of 5 wt%, and the energy density and power density were 22.5 W·h/kg and 7.3 kW/kg at a high current density of 20 A/g. The AC/CNT paper electrode also showed a good cycle performance, with 97.5% of the original capacity retained after 5000 cycles at a scan rate of 200 mV/s. This method affords not only a promising paper-like nanocomposite for use in low-cost and flexible supercapacitors, but also a general way of fabricating multi-functional paper-like CNT-based nanocomposites for use in devices such as flexible lithium ion batteries and solar cells.

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Section: Resultsmentioning

confidence: 99%

Binder-free activated carbon/carbon nanotube paper electrodes for use in supercapacitors

et al. 2011

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“…To further interpret the kinetic behavior of the aromatic sulfide, sulfoxide, and sulfone mediated MPCs, electrochemical impedance spectroscopy (EIS) was studied in a frequency range from 10 kHz to 10 mHz, using an equivalent circuit [15] to simulate the capacitive and resistive element. The Nyquist plots of TMCs and o-TMCs electrodes (Figure 4c) showed a semicircle in the high frequency region followed by a sloping straight line.…”

Section: Resultsmentioning

confidence: 99%

Aromatic sulfide, sulfoxide, and sulfone mediated mesoporous carbon monolith for use in supercapacitor

et al. 2012

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“…unveil whether the microporosity [15,16], mesoporosity [17,18] or their particular balance [19] direct the double-layer behavior. Chmiola et al [15] found anomalous increase in the double layer capacitance by reduction of the pore diameter below the diameter of solvated electrolyte ions.…”

Section: Introductionmentioning

confidence: 99%

Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment

Vujković

Gavrilov

Pašti

et al. 2013

Carbon

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Mesoporous carbon spheres grafted with carbon nanofibers for high-rate electric double layer capacitors

Cited by 127 publications

References 43 publications

Binder-free activated carbon/carbon nanotube paper electrodes for use in supercapacitors

Binder-free activated carbon/carbon nanotube paper electrodes for use in supercapacitors

Aromatic sulfide, sulfoxide, and sulfone mediated mesoporous carbon monolith for use in supercapacitor

Superior capacitive and electrocatalytic properties of carbonized nanostructured polyaniline upon a low-temperature hydrothermal treatment

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