Electrochemical properties of non-aqueous electrolytes containing spiro-type ammonium salts

Kim, Min-Gyeong; Kim, Seok

doi:10.1016/j.jiec.2014.02.015

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Spiro-(1,1′)-bipyrrolidinium tetrafluoroborate (SBPBF 4 ), a promising electrolyte, has attracted considerable attention in recent years . SBPBF 4 possesses a smaller molecular size and higher solubility and conductivity than those of other conventional electrolytes, such as tetraethylammonium tetrafluoroborate (TEABF 4 ), triethylmethyl-ammonium tetrafluoroborate (TEMABF 4 ), and 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF 4 ). ,, Moreover, when SBPBF 4 is dissolved in certain solvents, it can exhibit high voltages, for example, in propylene carbonate (PC), where the voltage can reach 3.5 V; however, the cycle stability and energy density of the supercapacitor do not perform well compared with those of the other three electrolytes. , This is due to the fact that the overall performance of supercapacitors depends not only on the voltage window of the electrolyte but also on the suitability of the electrolyte to the electrode material.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is no research about electrode materials that use SBPBF 4 as the electrolyte. Currently, research on SBPBF 4 is mainly focused on the study of electrolyte properties itself. − Even in the investigation of practical application performance, commercial activated carbon is often employed as the electrode, which though matches with SBPBF 4 may not show the best performance of supercapacitors . Therefore, we designed and optimized the architecture of porous carbon electrodes to bring out the better performance of the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

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Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na₂SO₄ and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes

Liu

Ren

Liang

et al. 2021

ACS Appl. Energy Mater.

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Na2SO4 and spiro-(1,1′)-bipyrrolidinium tetrafluoroborate (SBPBF4) are very promising electrolytes with low cost and high conductivity. For matching with two electrolytes to boost the energy density of the supercapacitor, a suitable electrode needs to be fabricated. Herein, porous carbon derived from discarded polyimide films is fabricated via H3PO4-assisted KOH activation. The hierarchical pore framework of porous carbon, which consists of micro–mesopores concentrated at 0.7–1 nm and >2 nm along with abundant cracks in the cross section, increases the effective energy storage sites and facilitates the ion diffusion rate of electrolytes. The high synergy between electrolytes and the architecture of electrodes endows the symmetrical capacitors (SCs) with outstanding performance. The SC in the Na2SO4 electrolyte delivers the operating voltages of 1.8 V and an energy density of 23.2 Wh kg–1 at a power density of 450 W kg–1. In the SBPBF4 electrolyte, the SC exhibits a high withstand voltage of 3.2 V and a conspicuous energy density of 70.2 Wh kg–1 at a power supply of 320 W kg–1. This work constructs a cooperative system of porous carbon electrodes and electrolytes boosting the energy density of supercapacitors and a sustainable strategy for resource utilization of discarded polyimide films.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na₂SO₄ and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes

Liu

Ren

Liang

et al. 2021

ACS Appl. Energy Mater.

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“…Non-aqueous electrolytes have a wide electrochemical stability of operative voltage compare to aqueous electrolytes. Because the window potential is related to the energy density (E = 1/2V 2 ), the voltage limit of the electrolyte is an important factor for the characteristics of a capacitor [2,[8][9][10]. The ionic conductivity, capacitance, and impedance of electrochemical stability are also significant parameters of the electrolyte.…”

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confidence: 99%

Ion conducting properties of imidazolium salts with tri-alkyl chains in organic electrolytes against activated carbon electrodes

Kim¹,

Park²,

Im³

et al. 2016

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Electrochemical double layer capacitors (EDLCs), a type of energy storage device, are currently receiving considerable attention. They have a high power density and good cycle ability. Furthermore, they operate on a simple mechanism where electrical charges in an electrochemical double layer are accumulated at the interface between the electrode and the electrolyte [1][2][3]. For these reasons, capacitors are used in a wide range of applications such as mobile phones, electrical vehicles, and industry power supplies.Capacitors generally consist of an electrode and an electrolyte. The electrode is prepared using carbon materials such as activated carbon, graphene, or graphite fibers [4][5][6][7]. Among the carbon materials, activated carbon, which has a high specific surface area and a large number of pores, is suitable for the capacitor electrode. In particular, it readily absorbs or desorbs electric charge. The electrolyte, meanwhile, can be divided into aqueous and nonaqueous electrolytes. Non-aqueous electrolytes have a wide electrochemical stability of operative voltage compare to aqueous electrolytes. Because the window potential is related to the energy density (E = 1/2V 2 ), the voltage limit of the electrolyte is an important factor for the characteristics of a capacitor [2,[8][9][10]. The ionic conductivity, capacitance, and impedance of electrochemical stability are also significant parameters of the electrolyte.Recently, ionic liquids (IL), which are also known as room temperature molten salts, have attracted attention for use in electrolytes due to their unique characteristics such as non-flammability, high ionic conductivity, low melting points, and wide electrochemical stability window. ILs have large cations and organic or inorganic anions in a liquid state at room temperature [11][12][13][14][15].Among various ILs, imidazolium based ILs are used most widely because the hydrogen of imidazolium can be easily substituted. In particular, imidazolium, which has 1-methyl-3-butyl side chains, is widely used in many fields of study due to its relatively low viscosity, high conductivity, and low melting point. A capacitor using 10% 1-butyl-3-methyl imidazolium tetrafluoroborate (BMImBF 4 ) was found to have the best electrochemical performance in our previous study [16]. Although imidazolium cation with 1,2,3-alkyl side chains has high viscosity, it presents excellent electrochemical stability [17]. However, the influence of 1,2,3-alkyl substituted imidazolium salts on the ion conducting property of organic electrolytes is not fully understood.The objective of this study was to find the optimal proportion of 1-butyl-2,3-dimethyl imidazolium tetrafluoroborate (BMMImBF 4 ), which is a tri-alkyl substituted imidazolium salt, as an additive in an organic electrolyte and to confirm the electrochemical performance of the resultant electrolyte for capacitor applications. BMMImBF 4 is an attractive candidate as an additive in organic electrolytes of EDLCs.The electrodes were composed of the activated materials, c...

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A novel electrolyte used in high working voltage application for electrical double-layer capacitor using spiro-(1,1′)-bipyrrolidinium tetrafluoroborate in mixtures solvents

Wang

Chen

et al. 2015

Electrochimica Acta

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Electrochemical properties of non-aqueous electrolytes containing spiro-type ammonium salts

Cited by 6 publications

References 22 publications

Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na₂SO₄ and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes

Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na₂SO₄ and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes

Ion conducting properties of imidazolium salts with tri-alkyl chains in organic electrolytes against activated carbon electrodes

A novel electrolyte used in high working voltage application for electrical double-layer capacitor using spiro-(1,1′)-bipyrrolidinium tetrafluoroborate in mixtures solvents

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Electrochemical properties of non-aqueous electrolytes containing spiro-type ammonium salts

Cited by 6 publications

References 22 publications

Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na2SO4 and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes

Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na2SO4 and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes

Ion conducting properties of imidazolium salts with tri-alkyl chains in organic electrolytes against activated carbon electrodes

A novel electrolyte used in high working voltage application for electrical double-layer capacitor using spiro-(1,1′)-bipyrrolidinium tetrafluoroborate in mixtures solvents

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Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na₂SO₄ and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes

Discarded Polyimide Film-Derived Hierarchical Porous Carbon Boosting the Energy Density of Supercapacitors in Na₂SO₄ and Spiro-(1,1′)-bipyrrolidinium Tetrafluoroborate Electrolytes