scholarly journals High Energy-Density Capacitor Based on Ammonium Salt Type Ionic Liquids and Their Mixing Effect by Propylene Carbonate

2005 ◽  
Vol 152 (4) ◽  
pp. A710 ◽  
Author(s):  
Yong-Jung Kim ◽  
Yutaka Matsuzawa ◽  
Shinya Ozaki ◽  
Ki Chul Park ◽  
Chan Kim ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Propylene Carbonate ◽  
Ammonium Salt ◽  
High Energy ◽  
High Energy Density ◽  
Mixing Effect

Approaching the maximum capacity of nickel-rich LiNi0.8Co0.1Mn0.1O2 cathodes by charging to high-voltage in a non-flammable electrolyte of propylene carbonate and fluorinated linear carbonates

2019 ◽  
Vol 55 (9) ◽  
pp. 1256-1258 ◽  
Author(s):  
Hieu Quang Pham ◽  
Eui-Hyung Hwang ◽  
Young-Gil Kwon ◽  
Seung-Wan Song
Keyword(s):  
Energy Density ◽  
Propylene Carbonate ◽  
High Voltage ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Lithium Metal ◽  
Maximum Capacity ◽  
Lithium Metal Batteries ◽  
First Time

We report for the first time a promising approach to achieve the maximum capacity of LiNi0.8Co0.1Mn0.1O2 cathodes in a non-flammable electrolyte for safe and high-energy density lithium-ion and lithium metal batteries.

Hexamethylene diisocyanate as an electrolyte additive for high-energy density lithium ion batteries

2015 ◽  
Vol 3 (16) ◽  
pp. 8246-8249 ◽  
Author(s):  
Yang Liu ◽  
Yinping Qin ◽  
Zhe Peng ◽  
Jingjing Zhou ◽  
Changjin Wan ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Propylene Carbonate ◽  
Interfacial Layer ◽  
Lithium Ion ◽  
High Energy ◽  
Hexamethylene Diisocyanate ◽  
High Energy Density ◽  
Electrolyte Additive

Hexamethylene diisocyanate can chemically react with the onium ion produced by the oxidation of propylene carbonate andin situgenerate a novel interfacial layer that is stable at high potential.

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.

scholarly journals Comparative Investigation of Non-halogenated Imidazolium and Phosphonium-based Surface-Active Ionic Liquids as Electrolyte for Supercapacitors

2021 ◽  
Author(s):  
Preeti Jain ◽  
Oleg N. Antzutkin
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Specific Capacitance ◽  
Power Density ◽  
High Energy ◽  
High Energy Density ◽  
Equivalent Series Resistance ◽  
Imidazolium Cations ◽  
Wide Range ◽  
Surface Active

<p>We report a comparative analysis of non-halogenated surface-active ionic liquids (SAILs), which consists of the surface-active anion, 2-ethylhexyl sulfate, and the phosphonium, and imidazolium cations <i>i.e.,</i> tetrabutylphosphonium ([P<sub>4444</sub>]<sup>+</sup>), trihexyl(tetradecyl)phosphonium ([P<sub>66614</sub>]<sup>+</sup>), and 1-methyl-3-hexylimidazolium ([C<sub>6</sub>C<sub>1</sub>IM]<sup>+</sup>). We explored the thermal and electrochemical properties, <i>i.e.</i>, degradation, melting and crystallization temperatures, and ionic conductivity of this new class of IL. These SAILs were tested as an electrolyte in a multi-walled carbon nanotubes (MWCNTs)-based supercapacitor at various temperatures from 253 to 373 K. The electrochemical performance of different SAILs by varying the cationic core as a function of temperature were compared, in the same MWCNT-based supercapacitor. We found that the supercapacitor cell with [C<sub>6</sub>C<sub>1</sub>IM][EHS] shown high specific capacitance (<i>C<sub>elec</sub></i> in F g<sup>-1</sup>), a high energy density (<i>E</i> in Wh kg<sup>-1</sup>), and a high power density (<i>P</i> in kW kg<sup>-1</sup>) when compared to those for the other SAILs <i>i.e.</i> [P<sub>4444</sub>][EHS], [P<sub>66614</sub>][EHS], and [N<sub>8888</sub>][EHS] at all temperatures. The supercapacitor with an MWCNT-based electrode and [C<sub>6</sub>C<sub>1</sub>IM][EHS], [P<sub>4444</sub>][EHS], and [P<sub>66614</sub>][EHS] as an electrolyte showed a specific capacitance of 148, 90, and 47 F g<sup>-1</sup> (at the scan rate of 2 mV s<sup>-1</sup>) with an energy density of 82, 50, and 26 Wh kg<sup>-1</sup> (at 2 mV s<sup>-1</sup>) respectively, at 298 K. The temperature effect can be seen by the three to four-fold increase in the specific capacitance of the cell and the energy density values, <i>i.e.</i>, 290, 198, and 114 F g<sup>-1</sup> (at 2 mV s<sup>-1</sup>) and 161, 110, and 63 Wh kg<sup>-1</sup> (at 2 mV s<sup>-1</sup>), respectively, at 373 K. This study reveals that these new SAILs specifically [C<sub>6</sub>C<sub>1</sub>IM][EHS] and [P<sub>4444</sub>][EHS] can potentially be used as electrolytes in the wide range of temperature. The solution resistance (<i>R<sub>s</sub></i>), charge transfer resistance (<i>R<sub>ct</sub></i>), and equivalent series resistance (ESR) also decreased with an increase in temperature for all SAILs as electrolytes. These new SAILs can explicitly be used for high-temperature (wide range of temperature) electrochemical applications, such as efficient supercapacitors for high energy storage due to enhanced specific capacitance, energy, and power density at elevated temperatures. </p>

scholarly journals Comparative Investigation of Non-halogenated Imidazolium and Phosphonium-based Surface-Active Ionic Liquids as Electrolyte for Supercapacitors

2021 ◽  
Author(s):  
Preeti Jain ◽  
Oleg N. Antzutkin
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Specific Capacitance ◽  
Power Density ◽  
High Energy ◽  
High Energy Density ◽  
Equivalent Series Resistance ◽  
Imidazolium Cations ◽  
Wide Range ◽  
Surface Active

<p>We report a comparative analysis of non-halogenated surface-active ionic liquids (SAILs), which consists of the surface-active anion, 2-ethylhexyl sulfate, and the phosphonium, and imidazolium cations <i>i.e.,</i> tetrabutylphosphonium ([P<sub>4444</sub>]<sup>+</sup>), trihexyl(tetradecyl)phosphonium ([P<sub>66614</sub>]<sup>+</sup>), and 1-methyl-3-hexylimidazolium ([C<sub>6</sub>C<sub>1</sub>IM]<sup>+</sup>). We explored the thermal and electrochemical properties, <i>i.e.</i>, degradation, melting and crystallization temperatures, and ionic conductivity of this new class of IL. These SAILs were tested as an electrolyte in a multi-walled carbon nanotubes (MWCNTs)-based supercapacitor at various temperatures from 253 to 373 K. The electrochemical performance of different SAILs by varying the cationic core as a function of temperature were compared, in the same MWCNT-based supercapacitor. We found that the supercapacitor cell with [C<sub>6</sub>C<sub>1</sub>IM][EHS] shown high specific capacitance (<i>C<sub>elec</sub></i> in F g<sup>-1</sup>), a high energy density (<i>E</i> in Wh kg<sup>-1</sup>), and a high power density (<i>P</i> in kW kg<sup>-1</sup>) when compared to those for the other SAILs <i>i.e.</i> [P<sub>4444</sub>][EHS], [P<sub>66614</sub>][EHS], and [N<sub>8888</sub>][EHS] at all temperatures. The supercapacitor with an MWCNT-based electrode and [C<sub>6</sub>C<sub>1</sub>IM][EHS], [P<sub>4444</sub>][EHS], and [P<sub>66614</sub>][EHS] as an electrolyte showed a specific capacitance of 148, 90, and 47 F g<sup>-1</sup> (at the scan rate of 2 mV s<sup>-1</sup>) with an energy density of 82, 50, and 26 Wh kg<sup>-1</sup> (at 2 mV s<sup>-1</sup>) respectively, at 298 K. The temperature effect can be seen by the three to four-fold increase in the specific capacitance of the cell and the energy density values, <i>i.e.</i>, 290, 198, and 114 F g<sup>-1</sup> (at 2 mV s<sup>-1</sup>) and 161, 110, and 63 Wh kg<sup>-1</sup> (at 2 mV s<sup>-1</sup>), respectively, at 373 K. This study reveals that these new SAILs specifically [C<sub>6</sub>C<sub>1</sub>IM][EHS] and [P<sub>4444</sub>][EHS] can potentially be used as electrolytes in the wide range of temperature. The solution resistance (<i>R<sub>s</sub></i>), charge transfer resistance (<i>R<sub>ct</sub></i>), and equivalent series resistance (ESR) also decreased with an increase in temperature for all SAILs as electrolytes. These new SAILs can explicitly be used for high-temperature (wide range of temperature) electrochemical applications, such as efficient supercapacitors for high energy storage due to enhanced specific capacitance, energy, and power density at elevated temperatures. </p>

Combustion Behavior of High Energy Density Borane–Aluminum Nanoparticles in Hypergolic Ionic Liquids

2018 ◽  
Vol 32 (7) ◽  
pp. 7898-7908 ◽  
Author(s):  
Jiang Yu ◽  
Tonya N. Jensen ◽  
William K. Lewis ◽  
Christopher E. Bunker ◽  
Steven P. Kelley ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Aluminum Nanoparticles ◽  
Combustion Behavior
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