scholarly journals Redox-active ionic liquid electrolyte with multi energy storage mechanism for high energy density supercapacitor

RSC Advances ◽  
2017 ◽  
Vol 7 (88) ◽  
pp. 55702-55708 ◽  
Author(s):  
Duck-Jae You ◽  
Zhenxing Yin ◽  
Yong-keon Ahn ◽  
Seong-Hun Lee ◽  
Jeeyoung Yoo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
Size Variation ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Energy Density ◽  
Halide Ions ◽  
Ionic Liquid Electrolyte ◽  
Storage Mechanism ◽  
Redox Active

A bimodal redox-active ionic liquid electrolyte for high energy density supercapacitors was fabricated by the redox reaction of halide ions and size variation of ions.

High energy density supercapacitor based on N/B co-doped graphene nanoarchitectures and ionic liquid electrolyte

Ionics ◽  
2019 ◽  
Vol 25 (9) ◽  
pp. 4351-4360 ◽  
Author(s):  
Zhongliang Yu ◽  
Jiahe Zhang ◽  
Chunxian Xing ◽  
Lei Hu ◽  
Lili Wang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Energy Density ◽  
Ionic Liquid Electrolyte ◽  
Doped Graphene ◽  
Co Doped

scholarly journals Improving Cycle Life Through Fast Formation Using a Super-Concentrated Phosphonium Based Ionic Liquid Electrolyte for Anode-Free and Lithium Metal Batteries

2021 ◽  
Author(s):  
Thushan Pathirana ◽  
Dmitrii Rakov ◽  
Fangfang Chen ◽  
Maria Forsyth ◽  
Robert Kerr ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
Electrochemical Impedance ◽  
Cell Formation ◽  
Lithium Ion ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Energy Density ◽  
Lithium Metal ◽  
Ionic Liquid Electrolyte

<p>ABSTRACT </p><p>Cell formation of lithium-ion cells impacts the evolution of the solid electrolyte interphase (SEI) and the cell cycle stability. Lithium metal anodes are an important step in the development of high energy density batteries owing to the high theoretical specific capacity of lithium metal. However, most lithium metal battery research has used a conventional lithium-ion formation protocol; this is time consuming, costly and does not account for the different properties of the lithium metal electrode. Here, we have used a recently reported promising phosphonium bis(fluorosulfonyl)imide ionic liquid electrolyte coupled with an NMC622 high areal capacity cathode (>3.5 mAh/cm2) to investigate the effect of cell formation rates. A faster formation protocol comprised of a pulsed 1.25C current decreased the formation time by 56 % and gave a 38 % greater capacity retention after 50 cycles when compared to formation at C/20. Electrochemical impedance spectroscopy measurements showed that the fast formation gave rise to a lower-resistance SEI. Column-like lithium deposits with reduced porous lithium domains between the particles were observed using scanning electron microscope imaging. To underline the excellent performance of these high energy-density cells, a 56 % greater stack specific energy was achieved compared to the analogous graphite-based lithium-ion cell chemistries. </p>

High-Li+-fraction ether-side-chain pyrrolidinium–asymmetric imide ionic liquid electrolyte for high-energy-density Si//Ni-rich layered oxide Li-ion batteries

2021 ◽  
pp. 132693
Author(s):  
Bharath Umesh ◽  
Purna Chandra Rath ◽  
Jagabandhu Patra ◽  
Rahmandhika Firdauzha Hary Hernandha ◽  
Subhasis Basu Majumder ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Energy Density ◽  
Side Chain ◽  
Li Ion Batteries ◽  
Layered Oxide ◽  
Ionic Liquid Electrolyte ◽  
Li Ion

scholarly journals Improving Cycle Life Through Fast Formation Using a Super-Concentrated Phosphonium Based Ionic Liquid Electrolyte for Anode-Free and Lithium Metal Batteries

2021 ◽  
Author(s):  
Thushan Pathirana ◽  
Dmitrii Rakov ◽  
Fangfang Chen ◽  
Maria Forsyth ◽  
Robert Kerr ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
Electrochemical Impedance ◽  
Cell Formation ◽  
Lithium Ion ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Energy Density ◽  
Lithium Metal ◽  
Ionic Liquid Electrolyte

<p>ABSTRACT </p><p>Cell formation of lithium-ion cells impacts the evolution of the solid electrolyte interphase (SEI) and the cell cycle stability. Lithium metal anodes are an important step in the development of high energy density batteries owing to the high theoretical specific capacity of lithium metal. However, most lithium metal battery research has used a conventional lithium-ion formation protocol; this is time consuming, costly and does not account for the different properties of the lithium metal electrode. Here, we have used a recently reported promising phosphonium bis(fluorosulfonyl)imide ionic liquid electrolyte coupled with an NMC622 high areal capacity cathode (>3.5 mAh/cm2) to investigate the effect of cell formation rates. A faster formation protocol comprised of a pulsed 1.25C current decreased the formation time by 56 % and gave a 38 % greater capacity retention after 50 cycles when compared to formation at C/20. Electrochemical impedance spectroscopy measurements showed that the fast formation gave rise to a lower-resistance SEI. Column-like lithium deposits with reduced porous lithium domains between the particles were observed using scanning electron microscope imaging. To underline the excellent performance of these high energy-density cells, a 56 % greater stack specific energy was achieved compared to the analogous graphite-based lithium-ion cell chemistries. </p>

Water as an Effective Additive for High‐Energy‐Density Na Metal Batteries? Studies in a Superconcentrated Ionic Liquid Electrolyte

ChemSusChem ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1700-1711 ◽  
Author(s):  
Shammi A. Ferdousi ◽  
Matthias Hilder ◽  
Andrew Basile ◽  
Haijin Zhu ◽  
Luke A. O'Dell ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Energy Density ◽  
Ionic Liquid Electrolyte ◽  
Effective Additive

High‐Safety and High‐Energy‐Density Lithium Metal Batteries in a Novel Ionic‐Liquid Electrolyte

2020 ◽  
Vol 32 (26) ◽  
pp. 2001741 ◽  
Author(s):  
Hao Sun ◽  
Guanzhou Zhu ◽  
Yuanmin Zhu ◽  
Meng‐Chang Lin ◽  
Hui Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Energy Density ◽  
Lithium Metal ◽  
Ionic Liquid Electrolyte ◽  
Lithium Metal Batteries

High energy density and high working voltage of a quasi-solid-state supercapacitor with a redox-active ionic liquid added gel polymer electrolyte

2019 ◽  
Vol 43 (47) ◽  
pp. 18935-18942 ◽  
Author(s):  
Cheng-Long Geng ◽  
Le-Qing Fan ◽  
Chun-Yan Wang ◽  
Yong-Lan Wang ◽  
Si-Jia Sun ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Energy Density ◽  
Polymer Electrolyte ◽  
Gel Polymer Electrolyte ◽  
High Energy ◽  
High Energy Density ◽  
Redox Active

A redox-active gel polymer electrolyte with a high working voltage was synthesized and used for assembling a quasi-solid-state supercapacitor possessing high energy density.

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