Solvent effects in ionic liquids: empirical linear energy–density relationships

2012 ◽  
Vol 14 (28) ◽  
pp. 10041 ◽  
Author(s):  
A. Cerda-Monje ◽  
A. Aizman ◽  
R. A. Tapia ◽  
C. Chiappe ◽  
R. Contreras
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Solvent Effects

Ionophobic nanopore enhancing capacitance and charging dynamics in supercapacitor with ionic liquids

2021 ◽  
Author(s):  
Zhongdong Gan ◽  
Yanlei Wang ◽  
Mi Wang ◽  
Enlai Gao ◽  
Feng Huo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Power Density ◽  
Porous Electrodes ◽  
Charging Dynamics

Nano-porous electrodes combined with ionic liquids (ILs) are widely favored to promote the energy density of supercapacitors. However, this is always accompanied by the reduced power density, especially considering the...

Interpretation of Hydroxylic Solvent Effects Based on Correlations with Solvent Parameters. Reaction of Et3N with EtI

1994 ◽  
Vol 59 (4) ◽  
pp. 898-904 ◽  
Author(s):  
António R. T. Calado ◽  
Lídia M. V. Pinheiro ◽  
Lídia M. P. C. Albuquerque ◽  
Raquel M. C. Goncalves ◽  
Martí Rosés ◽  
...  
Keyword(s):  
Energy Density ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Solvent Effects ◽  
Rate Constants ◽  
Cohesive Energy ◽  
Regression Equations ◽  
Solvatochromic Parameters ◽  
Cohesive Energy Density ◽  
Solvent Parameters

Hydroxylic solvent effects on 20 rate constants, k, of the Menschutkin reaction of Et3N with EtI are unravelled and rationalized by means of multiple linear regression equations. To perform this analysis new k values in 2 mono- and 9 dialcohols are obtained. New values are also presented for the Kamlet and Taft solvatochromic parameters π*, α and β of 1-hexanol. The results show that the solvent dipolarity, polarizability and cohesive energy density are the main properties influencing the reactivity, for the set of studied solvents.

Deactivation of the Cobalt Catalyst for the Cyclotrimerization of Acetylenes in Ionic Liquids: Solvent Effects on the Mechanism and Thermal and Pressure Activation Parameters

2011 ◽  
Vol 30 (15) ◽  
pp. 3919-3922 ◽  
Author(s):  
Teresa Avilés ◽  
Susanna Jansat ◽  
Manuel Martínez ◽  
Francisco Montilla ◽  
Carlos Rodríguez
Keyword(s):  
Ionic Liquids ◽  
Solvent Effects ◽  
Cobalt Catalyst ◽  
Activation Parameters

Solvent effects of ionic liquids: investigation of ferrocenes as electrochemical probes

2010 ◽  
Vol 24 (4) ◽  
pp. 327-334 ◽  
Author(s):  
Claudia Bizzarri ◽  
Valeria Conte ◽  
Barbara Floris ◽  
Pierluca Galloni
Keyword(s):  
Ionic Liquids ◽  
Solvent Effects

scholarly journals Studies on Possible Ion-Confinement in Nanopore for Enhanced Supercapacitor Performance in 4V EMIBF4 Ionic Liquids

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1664 ◽  
Author(s):  
Jie Deng ◽  
Jing Li ◽  
Zhe Xiao ◽  
Shuang Song ◽  
Luming Li
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Pore Size ◽  
High Energy ◽  
Alternative Form ◽  
Specific Power ◽  
Dual Model ◽  
Ionic Radii ◽  
Model Pore ◽  
Specific Power Density

Supercapacitors have the rapid charge/discharge kinetics and long stability in comparison with various batteries yet undergo low energy density. Theoretically, square dependence of energy density upon voltage reveals a fruitful but challenging engineering tenet to address this long-standing problem by keeping a large voltage window in the compositionally/structurally fine-tuned electrode/electrolyte systems. Inspired by this, a facile salt-templating enables hierarchically porous biochars for supercapacitors filled by the high-voltage ionic liquids (ILs). Resultant nanostructures possess a coherent/interpenetrated framework of curved atom-thick sidewalls of 0.8-/1.5-nanometer pores to reconcile the pore-size-dependent adlayer structures of ILs in nanopores. Surprisingly, this narrow dual-model pore matches ionic radii of selected ILs to accommodate ions by unique coupled nano-/bi-layer nanoconfinements, augmenting the degree of confinement (DoC). The high DoC efficiently undermines the coulombic ordering networks and induces the local conformational oscillations, thus triggering an anomalous but robust charge separation. This novel bi-/mono-layer nanoconfinement combination mediates harmful overscreening/overcrowding effects to reinforce ion-partitioning, mitigating long-lasting conflicts of power/energy densities. This interesting result differs from a long-held viewpoint regarding the sieving effect that ion-in-pore capacitance peaks only if pore size critically approaches the ion dimension. Optimal biocarbon finally presents a very high/stable operational voltage up to 4 V and specific energy/power rating (88.3 Whkg−1 at 1 kWkg−1, 47.7 Whkg−1 albeit at a high battery-accessible specific power density of 20 kWkg−1), overwhelmingly outperforming most hitherto-reported supercapacitors and some batteries. Such attractive charge storage level can preliminarily elucidate an alternative form of a super-ionic-state high-energy storage linked with both the coordination number and coulombic periodism of the few ion-sized mesopores inside carbon electrodes, escalating supercapacitors into a novel criterion of charge delivery.

Co-solvent effects for aromatic extraction with ionic liquids

2013 ◽  
Vol 180 ◽  
pp. 145-153 ◽  
Author(s):  
C.V. Manohar ◽  
Tamal Banerjee ◽  
Kaustubha Mohanty
Keyword(s):  
Ionic Liquids ◽  
Solvent Effects

Controllable synthesis of Mn3O4 nanodots@nitrogen-doped graphene and its application for high energy density supercapacitors

2017 ◽  
Vol 5 (11) ◽  
pp. 5523-5531 ◽  
Author(s):  
Li Liu ◽  
Lijun Su ◽  
Junwei Lang ◽  
Bin Hu ◽  
Shan Xu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Controllable Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Supercapacitors using ionic liquids (ILs) as electrolytes have triggered great interest due to their much higher energy density when compared to aqueous supercapacitors.

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