Characteristics of powdered activated carbon treated with dielectric barrier discharge for electric double-layer capacitors

Tashima, Daisuke; Yoshitama, Hiromu; Sakoda, Tatsuya; Okazaki, Akihito; Kawaji, Takayuki

doi:10.1016/j.electacta.2012.05.105

Cited by 5 publications

(4 citation statements)

References 23 publications

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“…Numerous studies have been done to increase the SSA. [58,201,[220][221][222][223][224] It is expected that with ah igher SSA, more electrolyte ions can be stored at the solid electrolyte interface. However,t here is no proportionality between the SSA (measured by BET) and C s .…”

Section: Activated Carbons For Ecsmentioning

confidence: 99%

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

2015

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A rapidly developing market for portable electronic devices and hybrid electrical vehicles requires an urgent supply of mature energy-storage systems. As a result, lithium-ion batteries and electrochemical capacitors have lately attracted broad attention. Nevertheless, it is well known that both devices have their own drawbacks. With the fast development of nanoscience and nanotechnology, various structures and materials have been proposed to overcome the deficiencies of both devices to improve their electrochemical performance further. In this Review, electrochemical storage mechanisms based on carbon materials for both lithium-ion batteries and electrochemical capacitors are introduced. Non-faradic processes (electric double-layer capacitance) and faradic reactions (pseudocapacitance and intercalation) are generally explained. Electrochemical performance based on different types of electrolytes is briefly reviewed. Furthermore, impedance behavior based on Nyquist plots is discussed. We demonstrate the influence of cell conductivity, electrode/electrolyte interface, and ion diffusion on impedance performance. We illustrate that relaxation time, which is closely related to ion diffusion, can be extracted from Nyquist plots and compared between lithium-ion batteries and electrochemical capacitors. Finally, recent progress in the design of anodes for lithium-ion batteries, electrochemical capacitors, and their hybrid devices based on carbonaceous materials are reviewed. Challenges and future perspectives are further discussed.

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Section: Activated Carbons For Ecsmentioning

confidence: 99%

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

2015

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“…It has been reported that activated carbon treated with air or cold oxygen plasma processes can be efficiently used as adsorbent material for removing various pollutants [10]. However, the cold plasma modification requires a highly vacuum environment when applied in activated carbon modification, while dielectric barrier discharge (DBD) can be operated at atmospheric pressure [11]. The cold plasma needs a series of vacuum equipment and maintains a vacuum when in motion, which is expensive and energy consuming.…”

Section: Introductionmentioning

confidence: 99%

“…The cold plasma needs a series of vacuum equipment and maintains a vacuum when in motion, which is expensive and energy consuming. Also, previous studies have found that etching the surface layer of activated carbon using DBD plasma resulted in an increase in the capacitance, which is mostly attributed to the creation of functional groups on the surface [7,11,12]. Xu et al have performed water vapour plasma modification on wheat straw to improve bonding property.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the electrochemical properties of commercial coconut shell-based activated carbon by H ₂ O dielectric barrier discharge plasma

et al. 2019

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Commercial coconut shell-based activated carbon (CSAC) has low specific capacitance and specific capacitance retention owing to its undeveloped pore structure and low proportion of heteroatoms. In this study, dielectric barrier discharge plasma was used to enhance the specific capacitance and rate capability of CSAC. H 2 O was used as an excited medium to introduce oxygen functional groups. The physico-chemical properties of CSAC and CSAC modified by H 2 O plasma (HCSAC) were revealed by automated surface area and pore size analysis, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. Electrochemical work was applied to investigate the electrochemical properties of CSAC and HCSAC. The results obtained showed that plasma modification improved the specific capacitance of CSAC by 64.8% (current density, 1 A g −1 ; electrolyte, 6 M KOH solution) within 100 s. This result is ascribed to the oxygen functional groups introduced to the surface of CSAC. It can also improve the hydrophilicity and wettability of the carbon surface leading to an increase from 76.7% to 84.6% in specific capacitance retention. Furthermore, H 2 O plasma modification can introduce oxygen functional groups without destroying the initial pore structures of CSAC. In summary, we provide a simple, fast, environment-friendly modification method to enhance the electrochemical properties of CSAC.

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“…Electrochemical capacitors have attracted much interest as alternative energy storage systems compared to conventional capacitors and secondary batteries in the last decade . Electric double layer capacitors (EDLCs) are being developed in many research laboratories as alternative power sources.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance analysis of barium titanate incorporated in corn starch‐based polymer electrolytes for electric double layer capacitor application

Teoh

Lim

Liew

et al. 2015

J of Applied Polymer Sci

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Polymer electrolyte membranes composing of corn starch as host polymer, lithium perchlorate (LiClO 4 ) as salt, and barium titanate (BaTiO 3 ) as composite filler are prepared using solution casting technique. Ionic conductivity is enhanced on addition of BaTiO 3 by reducing the crystallinity and increasing the amorphous phase content of the polymer electrolyte. The highest ionic conductivity of 1.28 3 10 22 S cm 21 is obtained for 10 wt % BaTiO 3 filler in corn starch-LiClO 4 polymer electrolytes at 758C. Glass transition temperature (T g ) of polymer electrolytes decreases as the amount of BaTiO 3 filler is increased, as observed in differential scanning calorimetry analysis. Scanning electron microscopy and thermogravimetric analysis are employed to characterize surface morphological and thermal properties of BaTiO 3 -based composite polymer electrolytes. The electrochemical properties of the electric double-layer capacitor fabricating using the highest ionic conductivity polymer electrolytes is investigated using cyclic voltammetry and charge-discharge analysis. The discharge capacitance obtained is 16.22 F g 21 . V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43275.

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Characteristics of powdered activated carbon treated with dielectric barrier discharge for electric double-layer capacitors

Cited by 5 publications

References 23 publications

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

Enhancement of the electrochemical properties of commercial coconut shell-based activated carbon by H ₂ O dielectric barrier discharge plasma

Preparation and performance analysis of barium titanate incorporated in corn starch‐based polymer electrolytes for electric double layer capacitor application

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Characteristics of powdered activated carbon treated with dielectric barrier discharge for electric double-layer capacitors

Cited by 5 publications

References 23 publications

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

Carbon‐Based Materials for Lithium‐Ion Batteries, Electrochemical Capacitors, and Their Hybrid Devices

Enhancement of the electrochemical properties of commercial coconut shell-based activated carbon by H 2 O dielectric barrier discharge plasma

Preparation and performance analysis of barium titanate incorporated in corn starch‐based polymer electrolytes for electric double layer capacitor application

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Enhancement of the electrochemical properties of commercial coconut shell-based activated carbon by H ₂ O dielectric barrier discharge plasma