2023
DOI: 10.1007/s10853-023-08148-5
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Effect of electrolyte and carbon material on the electrochemical performance of high-voltage aqueous symmetric supercapacitors

Abstract: The energy storage capability of the aqueous supercapacitors is mainly attributed to the relatively low operating voltage of the device, as the thermodynamic decomposition voltage of water is 1.23 V. Therefore, the extension of the working voltage of the aqueous capacitor beyond the electrolyte decomposition limit is an important subject for the development of environmentally friendly energy storage devices. In this study, a commercial activated carbon (AC) and synthesized phosphorus-doped reduced graphene oxi… Show more

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Cited by 21 publications
(11 citation statements)
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“…Impedance experiments were implemented at open circuit potential in the range of 10 mHz to 100 kHz with an amplitude of 10 mV. Diffusion coefficient D [m 2 s À 1 ] was calculated by using equation ( 7) as follows: [43][44][45] D ¼ w=R 2 (7) w is the knee frequency, at which the impedance spectra reveal a capacitive behaviour of the system (change from 45°to 90°). R [cm] is the thickness of electrode and describes the path ions must pass through during charge storage.…”
Section: Electrochemical Measurementsmentioning
confidence: 99%
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“…Impedance experiments were implemented at open circuit potential in the range of 10 mHz to 100 kHz with an amplitude of 10 mV. Diffusion coefficient D [m 2 s À 1 ] was calculated by using equation ( 7) as follows: [43][44][45] D ¼ w=R 2 (7) w is the knee frequency, at which the impedance spectra reveal a capacitive behaviour of the system (change from 45°to 90°). R [cm] is the thickness of electrode and describes the path ions must pass through during charge storage.…”
Section: Electrochemical Measurementsmentioning
confidence: 99%
“…This enables high power densities and high cyclability up to 10 6 cycles [6] . Unfortunately, the energy density of SCs is not yet competitive with that of batteries [7] . Intensive research is therefore being conducted to increase the energy density of SCs.…”
Section: Introductionmentioning
confidence: 99%
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“…The choice of electrode material and design plays a significant role in determining a supercapacitor's performance, so these factors should also be considered in a performance review 16–18 . Electrolytes with liquid or solid‐state types are a key factor in storing the electrical charge.…”
Section: Introductionmentioning
confidence: 99%
“…14,15 The choice of electrode material and design plays a significant role in determining a supercapacitor's performance, so these factors should also be considered in a performance review. [16][17][18] Electrolytes with liquid or solidstate types are a key factor in storing the electrical charge. Although the ion diffusion in solid-state electrolytes is not as fast as the liquid electrolyte, they are extremely versatile as a standalone energy source component for certain applications or in combination with batteries as a hybrid system.…”
Section: Introductionmentioning
confidence: 99%