Investigation of methoxypropionitrile as co-solvent for ethylene carbonate based electrolyte in supercapacitors. A safe and wide temperature range electrolyte

Perricone, Emmanuelle; Chamas, Mohamad; Cointeaux, Laure; Leprêtre, Jean‐Claude; Judeinstein, Patrick; Azaïs, Philippe; Béguin, François; Alloin, Fannie

doi:10.1016/j.electacta.2013.01.084

Cited by 49 publications

(27 citation statements)

References 17 publications

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“…In other words, during this cooling step, DSC measurements demonstrated that each solution presents a supercooled state, which ranges from 16 43 Additionally, boiling point temperatures at 0.1 MPa and vapor pressure 25°C are reported in Table 3 in the case of investigated solvent and electrolytes; these properties were calculated by using the VLE/LLE option within COSMOthermX software. By using this methodology, it is important to notify that the vapor pressure of a solution can be estimated by using its "energy values" or "vap.…”

Section: Predictive Methodsmentioning

confidence: 99%

Physicochemical Investigation of Adiponitrile-Based Electrolytes for Electrical Double Layer Capacitor

2014

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Herein, we present the formulation and the characterization of novel adiponitrile-based electrolytes as a function of the salt structure, concentration, and temperature for supercapacitor applications using activated carbon based electrode material. To drive this study two salts were selected, namely, the tetraethylammonium tetrafluoroborate and the 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide. Prior to determination of their electrochemical performance, formulated electrolytes were first characterized to quantify their thermal, volumetric, and transport properties as a function of temperature and composition. Then, cyclic voltammetry and electrochemical impedance spectroscopy techniques were used to investigate their electrochemical properties as electrolyte for supercapacitor applications in comparison with those reported for the currently used model electrolyte based on the dissolution of 1 mol·dm −3 of tetraethylammonium tetrafluoroborate in acetonitrile. Surprisingly, excellent electrochemical performances were observed by testing adiponitrile-based electrolytes, especially those containing the 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide roomtemperature molten salt. Differences observed on electrochemical performances between the selected adiponitrile electrolytes based on high-temperature (tetraethylammonium tetrafluoroborate) and the room-temperature (1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide) molten salts are mainly driven by the salt solubility in adiponitrile, as well as by the charge and the structure of each involved species. Furthermore, in comparison with classical electrolytes, the selected adiponitrile +1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide solution exhibits almost similar specific capacitances and lower equivalent serial resistance. These results demonstrate in fact that the adiponitrile +1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide mixture can be used for the formulation of safer electrolytes presenting a very low vapor pressure even at high temperatures to design acetonitrile-free supercapacitor devices with comparable performances.

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Section: Predictive Methodsmentioning

confidence: 99%

Physicochemical Investigation of Adiponitrile-Based Electrolytes for Electrical Double Layer Capacitor

2014

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“…213,214 In the literature, carbonates (EC, DEC, and DMC 147,148,215 ) and sulfites (diethyl sulfite (DES) and 1,3-propylene sulfite (PS) 147 ) were studied as the additives or co-solvents for the binary PC-based solvents. As mentioned previously, although PC has been regard as a promising alternative for the ACN solvent, it suffers from lower conductivity and viscosity, and poorer thermal stability when compared to the ACN-based electrolytes.…”

Section: Mixtures Of Solvents For Electrolytesmentioning

confidence: 99%

A review of electrolyte materials and compositions for electrochemical supercapacitors

et al. 2015

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Electrolytes have been identified as some of the most influential components in the performance of electrochemical supercapacitors (ESs), which include: electrical double-layer capacitors, pseudocapacitors and hybrid supercapacitors. This paper reviews recent progress in the research and development of ES electrolytes. The electrolytes are classified into several categories, including: aqueous, organic, ionic liquids, solid-state or quasi-solid-state, as well as redox-active electrolytes. Effects of electrolyte properties on ES performance are discussed in detail. The principles and methods of designing and optimizing electrolytes for ES performance and application are highlighted through a comprehensive analysis of the literature. Interaction among the electrolytes, electro-active materials and inactive components (current collectors, binders, and separators) is discussed. The challenges in producing high-performing electrolytes are analyzed. Several possible research directions to overcome these challenges are proposed for future efforts, with the main aim of improving ESs' energy density without sacrificing existing advantages (e.g., a high power density and a long cycle-life) (507 references).

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“…Some co-solvents can be used to increase electrolyte conductivity and decrease its viscosity. [1][2][3][4] Most alternative electrolyte solutions compose of non-aqueous solvents (or mixtures of solvents) such as propylene carbonate (PC), ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) and of tetraalkyl ammonium cation (generally tetraethylammonium tetrafluoroborate ((C 2 H 5 ) 4 NBF 4 ) or triethylmethylammonium tetrafluoroborate ((C 2 H 5 ) 3 CH 3 NBF 4 )) based salts. [5][6][7][8] Cyclic carbonates (PC and EC) have a high dielectric constant, good compatibility with carbon electrodes and dissolve salts in sufficient concentrations.…”

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confidence: 99%

Vinylene Carbonate as Co-Solvent for Low-Temperature Mixed Electrolyte Based Supercapacitors

Väli

Jänes

Lust

2016

J. Electrochem. Soc.

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The electrochemical characteristics of supercapacitors consisting of molybdenum carbide derived carbon C(Mo2C) electrodes in 1M NaPF6 solutions in various mixtures (0.5–5%) of vinylene carbonate (VC) with propylene carbonate (PC) and ethyl acetate (EA) (1:1 by volume) have been studied using cyclic voltammetry, constant current charging/discharging and electrochemical impedance spectroscopy methods. The specific capacitance and series resistance values dependencies on the used solvent mixture and applied temperature (from −40°C to 60°C) have been established. The region of ideal polarizability has been established for C(Mo2C) electrodes in all electrolytes and temperatures investigated, except at T ≥ 40°C. Specific conductivity values have been measured and correlated with electrochemistry data. Limiting capacitance, calculated characteristic time constant and complex power values depend noticeably on the solvent mixture used in the electrolyte, i.e. on the viscosity and specific conductivity of the electrolyte solution. The studied electrolytes are potential candidates for low-temperature supercapacitors.

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Investigation of methoxypropionitrile as co-solvent for ethylene carbonate based electrolyte in supercapacitors. A safe and wide temperature range electrolyte

Cited by 49 publications

References 17 publications

Physicochemical Investigation of Adiponitrile-Based Electrolytes for Electrical Double Layer Capacitor

Physicochemical Investigation of Adiponitrile-Based Electrolytes for Electrical Double Layer Capacitor

A review of electrolyte materials and compositions for electrochemical supercapacitors

Vinylene Carbonate as Co-Solvent for Low-Temperature Mixed Electrolyte Based Supercapacitors

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