The effect of potassium iodide (KI) addition to aqueous-based electrolyte (sulfuric acid/H2SO4) for increase the performance of supercapacitor cells

Taer, Erman; Putri, Aldila; Farma, Rakhmawati; Awitdrus,; Taslim, Rika; Apriwandi, Apriwandi; Agustino,; Yusra, Deris Afdal

doi:10.1016/j.matpr.2020.11.447

Cited by 8 publications

(4 citation statements)

References 12 publications

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“…Before activation on hightemperature pyrolysis, the density of GLACs ranged from 0.870 to 0.890 g cm À 3 at a standard deviation of 0.010. This value is relatively normal for biomass-based solid carbon, as also reported in previous studies of different waste precursors especially sago waste [27] and Areca catechu husk waste. [28] After multi-activation sequences pyrolyzed at high temperature, the densities of GLAC-5, GLAC7, and GLAC9 were significantly degraded by 0.620, 0.440, and 0.560 g cm À 3 , respectively.…”

Section: Resultssupporting

confidence: 81%

Suitable Micro/Mesoporous Carbon Derived from Galangal Leaves (Alpinia galanga L.) Biomass for Enhancing Symmetric Electrochemical Double‐layer Capacitor Performances

et al. 2022

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Recently, micro/mesoporous biomass‐based functional carbon as an excellent electrode material and energy storage device has attracted massive attention due to the availability of abundant raw materials, adaptability to pore structure, good chemical‐physical behaviors, high conductivity, enhanced energy density, and long life cyclic stability. This study performs micro/meso carbon from the novel galangal leaves biomass through KOH and CO2 activation as electrodes material for symmetric supercapacitors. The activated carbon obtained showed a clear hierarchical pore structure with an excellent micro:meso ratio of 56.72 %:43.28 % which caused their high electrochemical properties. The carbon was further assembled into electrodes through a binder‐free solid disc designed to assess the electrochemical performance as a supercapacitor. The results indicated that the galangal leaves‐based adapted micro/mesoporous carbon obtained a high specific capacitance of 161 F g−1 at 1 A g−1. Additionally, the symmetric supercapacitor had a specific capacitance retention rate of 78 % at 10 mV s−1 and low resistance in the aqueous electrolyte of 1 M H2SO4. The maximum energy density was 19.53 Wh kg−1 at an optimum power density of 132.32 W kg−1. Therefore, the appropriate micro/mesopores carbon ratio based on the novel galangal leaves biomass can be considered as a good electrode material for high‐performance supercapacitor.

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Section: Resultssupporting

confidence: 81%

Suitable Micro/Mesoporous Carbon Derived from Galangal Leaves (Alpinia galanga L.) Biomass for Enhancing Symmetric Electrochemical Double‐layer Capacitor Performances

et al. 2022

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“…202 This behavior during the synthesis processes can increase the synergy between the substances and can also modify the structure of materials, and some intercalation substances can also improve the electrochemical properties. [203][204][205][206][207] However, the application of this modification method needs to consider the force between raw materials. A certain theoretical study for this method can have an unexpected effect.…”

Section: Addition Of Componentsmentioning

confidence: 99%

Progress of layered double hydroxide-based materials for supercapacitors

Ren

Sridhar³

et al. 2023

Mater. Chem. Front.

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“…[37] However, the increased activity of ZnI 2 in an aqueous zinc sulphate solution is noteworthy. [30,38] This is, in fact, due to the exceptionally high solubility of ZnI 2 compared to even KI (ZnI 2 solubility is 450/100 g of water (20 °C) versus KI solubility is 150/100 g of water at 20 °C; both are constituted by ionic bonds). Further, we performed control experiments to investigate the role of each component in gaining large capacity in the redox electrolyte system using cyclic voltammetry (Figures S18 and S19, Supporting Information).…”

Section: Electrochemical Measurements In a Three-electrode Modementioning

confidence: 99%

Made to Measure Squaramide COF Cathode for Zinc Dual‐Ion Battery with Enriched Storage via Redox Electrolyte

Kushwaha,

Jain,

Shekhar

et al. 2023

Advanced Energy Materials

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Aqueous rechargeable batteries are promising grid‐scale energy storage devices because of their affordability, operational safety, and environmental benignity. Among these, Zn‐ion batteries (ZIBs) have unfolded new horizons. Designing superior cathodes for ZIBs is crucial. Covalent organic frameworks (COFs) can be made redox active with a high storage surface. Here, for the first time, a chelating COF with redox‐active ZnI2 in a ZnSO4(aq) electrolyte is combined. Including iodide harvests an approximately threefold enhancement in capacity from 208 to 690 mAh g−1 at 1.5 A g−1, the highest among all the COF‐derived ZIBs. Remarkably, a charge–discharge curve at 1.3 V exhibits very limited dropout voltage and super‐flat platform, with a remarkable capacity of 600 mAh g−1 at 5 A g−1 stable up to 6000 cycles, confirming that the polyiodide generation and storage are sustainable. The COF's dual‐ion storage (Zn2+ and polyidode) delivers a ZIB with the highest energy density. Spectro‐electrochemical measurements coupled with X‐ray photoelectron spectroscopy unambiguously unveil the existence of multiple polyiodide species, with I3− and IO3− ions as the prominent species. The latter gets reduced at the COF electrode under an applied potential, leaving I3− as the major species stored on the COF. The prospect of COF‐polyiodide(aq) is a windfall for metal‐ion batteries.

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The effect of potassium iodide (KI) addition to aqueous-based electrolyte (sulfuric acid/H2SO4) for increase the performance of supercapacitor cells

Cited by 8 publications

References 12 publications

Suitable Micro/Mesoporous Carbon Derived from Galangal Leaves (Alpinia galanga L.) Biomass for Enhancing Symmetric Electrochemical Double‐layer Capacitor Performances

Suitable Micro/Mesoporous Carbon Derived from Galangal Leaves (Alpinia galanga L.) Biomass for Enhancing Symmetric Electrochemical Double‐layer Capacitor Performances

Progress of layered double hydroxide-based materials for supercapacitors

Made to Measure Squaramide COF Cathode for Zinc Dual‐Ion Battery with Enriched Storage via Redox Electrolyte

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