Electrical properties of hydrocarbon‐derived electrolytes for supercapacitors

Noorden, Zulkarnain Ahmad; Sugawara, Sougoro; Matsumoto, Satoshi

doi:10.1002/tee.21802

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…Remarkably, at higher concentration of TEABF4, the curve of glass wool-based supercapacitor was apparently found above of the rest of supercapacitors indicating its much better performance in terms of power and energy densities. This finding implies supercapacitor with higher concentration of TEABF4 electrolyte possesses an improved accumulation process on the active electrodes due to its higher number of ions available, thus improving the capacitive properties of supercapacitor [24][25].…”

Section: Resultsmentioning

confidence: 88%

Electrochemical performance of supercapacitor with glass wool separator under TEABF4 electrolyte

Yaacob¹,

Noorden²,

Razak³

et al. 2020

Bulletin EEI

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The paper presents the electrochemical performance of supercapacitor with glass wool separator under organic electrolyte of tetraethylammonium tetrafluoroborate (TEABF4). The performance was evaluated using symmetrical two-electrode system and compared to an identical supercapacitor with commercially available cellulose paper separator under 1 M TEABF4. The application of glass wool separator reduces the bulk resistance of supercapacitor by 19.6%, promotes more efficient ions transfer across active surface of electrode and significantly improves specific capacitance by 19.1% compared to cellulose paper. The application of higher concentration TEABF4 (1.5 M) even improves the overall performance of glass wool-based supercapacitor by 32.2% reduction of bulk resistance and 61.9% increment in specific capacitance compared to 1 M TEABF4. In addition, the energy and power densities are significantly improved by 64% and 165%, respectively for the one with 1.5 M TEABF4. In general, the low-cost material glass wool material has great potential to replace commercially available cellulose paper as separator in developing much better supercapacitor.

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Section: Resultsmentioning

confidence: 88%

Electrochemical performance of supercapacitor with glass wool separator under TEABF4 electrolyte

Yaacob¹,

Noorden²,

Razak³

et al. 2020

Bulletin EEI

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“…When comparing with the cellulose separator, the noncorrosive‐separator‐based capacitors exhibit comparable performance in terms of power and energy densities. By employing such materials coupled with two‐electrode cell system, extended studies on EDLC with a high‐concentration electrolyte 16,22 –instead of using less practical evaluation cell (e.g., three‐electrode cell that evaluates only half‐side of capacitor)–could be conducted in a way that approaches practical EDLC application. It is believed with such a new approach, superior performance EDLC in both power and energy capacities could be achieved at relatively low cost compared to non‐aqueous‐based capacitors.…”

Section: Resultsmentioning

confidence: 99%

Noncorrosive separator materials for electric double layer capacitor

Noorden

Sugawara

Matsumoto

2014

IEEJ Trans Elec Electron Eng

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The paper evaluates noncorrosive and inexpensive materials, namely polypropylene sheet, fiberglass, and glass wool, as potential separator materials for electric double-layer capacitor (EDLC) application. Using these materials as separators and the same activated carbon electrodes, properties of two-electrode capacitors filled with aqueous sulfuric acid (H 2 SO 4 ) were investigated by cyclic voltammetry (CV) as well as galvanostatic and electrochemical impedance spectroscopy (EIS) measurements. Performance comparison of the tested capacitors with an identical capacitor with conventional cellulose separator was also carried out. As a benchmark, the noncorrosive-separator-based capacitors demonstrate comparable power and energy densities to those of a cellulose separator, with the highest specific capacitance of 131 F/g and lowest equivalent series resistance of 13 for the glass wool separator. Application of such noncorrosive separators may realize the utilization of high-concentration aqueous electrolytes, leading to higher rating EDLCs at lower cost compared to organic-solution-based capacitors.

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“…The capacitance values of these hydrocarbon-derived electrolytes are also in good agreement with those in a previously reported study. 16)…”

Section: CVmentioning

confidence: 99%

Electrochemical Study of Hydrocarbon-Derived Electrolytes for Supercapacitors

Noorden

Matsumoto²

2013

Jpn. J. Appl. Phys.

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In this paper, we evaluate the essential electrochemical properties – capacitive and resistive behaviors – of hydrocarbon-derived electrolytes for supercapacitor application using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrolytes were systematically prepared from three hydrocarbon-derived compounds, which have different molecular structures and functional groups, by treatment with high-concentration sulfuric acid (H2SO4) at room temperature. Two-electrode cells were assembled by sandwiching an electrolyte-containing glass wool separator with two active electrodes of activated carbon sheets. The dc electrical properties of the tested cells in terms of their capacitive behavior were investigated by CV, and in order to observe the frequency characteristics of the constructed cells, EIS was carried out. Compared with the tested cell with only high-concentration H2SO4 as the electrolyte, the cell with the derived electrolytes exhibit a capacitance as high as 135 F/g with an improved overall internal resistance of 2.5 Ω. Through the use of a simple preparation method and low-cost precursors, hydrocarbon-derived electrolytes could potentially find large-scale and higher-rating supercapacitor applications.

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Electrical properties of hydrocarbon‐derived electrolytes for supercapacitors

Cited by 8 publications

References 14 publications

Electrochemical performance of supercapacitor with glass wool separator under TEABF4 electrolyte

Electrochemical performance of supercapacitor with glass wool separator under TEABF4 electrolyte

Noncorrosive separator materials for electric double layer capacitor

Electrochemical Study of Hydrocarbon-Derived Electrolytes for Supercapacitors

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