scholarly journals High Current Cycling in a Superconcentrated Ionic Liquid Electrolyte to Promote Uniform Li Morphology and a Uniform LiF-Rich Solid Electrolyte Interphase

2020 ◽  
Vol 12 (37) ◽  
pp. 42236-42247
Author(s):  
Kalani Periyapperuma ◽  
Elisabetta Arca ◽  
Steven Harvey ◽  
Thushan Pathirana ◽  
Chunmei Ban ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Liquid Electrolyte ◽  
High Current ◽  
Ionic Liquid Electrolyte

Hybrid solid electrolyte with the combination of Li7La3Zr2O12 ceramic and ionic liquid for high voltage pseudo-solid-state Li-ion batteries

2016 ◽  
Vol 4 (43) ◽  
pp. 17025-17032 ◽  
Author(s):  
Hyun Woo Kim ◽  
Palanisamy Manikandan ◽  
Young Jun Lim ◽  
Jin Hong Kim ◽  
Sang-cheol Nam ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Solid Electrolyte ◽  
High Voltage ◽  
Liquid Electrolyte ◽  
Li Ion Batteries ◽  
Ceramic Particles ◽  
Ionic Liquid Electrolyte ◽  
Safety Aspects ◽  
Li Ion

Concerning the safety aspects of high-voltage Li-ion batteries, a pelletized hybrid solid electrolyte (HSE) was prepared by blending Li7La3Zr2O12 (LLZO) ceramic particles and an ionic liquid electrolyte (ILE) for use in pseudo-solid-state Li-ion batteries.

Fast charging with high capacity for aluminum rechargeable batteries using organic additive in an ionic liquid electrolyte

2020 ◽  
Vol 22 (47) ◽  
pp. 27525-27528
Author(s):  
Yeseul Park ◽  
Danbi Lee ◽  
Jongmin Kim ◽  
Gibaek Lee ◽  
Yongsug Tak
Keyword(s):  
Ionic Liquid ◽  
Specific Capacity ◽  
High Capacity ◽  
Liquid Electrolyte ◽  
Rechargeable Batteries ◽  
Organic Additive ◽  
High Current ◽  
High Specific Capacity ◽  
Ionic Liquid Electrolyte ◽  
Fast Charging

The electrolyte containing benzene additive in Al-ion battery exhibited the best electrochemical properties with a high specific capacity at an extremely high current rate.

Enhanced Ion Transport in an Ether Aided Super Concentrated Ionic Liquid Electrolyte for Long-Life Practical Lithium Metal Battery Applications

2020 ◽  
Author(s):  
Urbi Pal ◽  
Fangfang Chen ◽  
Derick Gyabang ◽  
Thushan Pathirana ◽  
Binayak Roy ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ion Transport ◽  
Current Density ◽  
Coulombic Efficiency ◽  
High Energy ◽  
Liquid Electrolyte ◽  
High Mass ◽  
Lithium Metal ◽  
Ionic Liquid Electrolyte ◽  
Lithium Metal Battery

We explore a novel ether aided superconcentrated ionic liquid electrolyte; a combination of ionic liquid, <i>N</i>-propyl-<i>N</i>-methylpyrrolidinium bis(fluorosulfonyl)imide (C<sub>3</sub>mpyrFSI) and ether solvent, <i>1,2</i> dimethoxy ethane (DME) with 3.2 mol/kg LiFSI salt, which offers an alternative ion-transport mechanism and improves the overall fluidity of the electrolyte. The molecular dynamics (MD) study reveals that the coordination environment of lithium in the ether aided ionic liquid system offers a coexistence of both the ether DME and FSI anion simultaneously and the absence of ‘free’, uncoordinated DME solvent. These structures lead to very fast kinetics and improved current density for lithium deposition-dissolution processes. Hence the electrolyte is used in a lithium metal battery against a high mass loading (~12 mg/cm<sup>2</sup>) LFP cathode which was cycled at a relatively high current rate of 1mA/cm<sup>2</sup> for 350 cycles without capacity fading and offered an overall coulombic efficiency of >99.8 %. Additionally, the rate performance demonstrated that this electrolyte is capable of passing current density as high as 7mA/cm<sup>2</sup> without any electrolytic decomposition and offers a superior capacity retention. We have also demonstrated an ‘anode free’ LFP-Cu cell which was cycled over 50 cycles and achieved an average coulombic efficiency of 98.74%. The coordination chemistry and (electro)chemical understanding as well as the excellent cycling stability collectively leads toward a breakthrough in realizing the practical applicability of this ether aided ionic liquid electrolytes in lithium metal battery applications, while delivering high energy density in a prototype cell.

scholarly journals Probing the Na metal solid electrolyte interphase via cryo-transmission electron microscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bing Han ◽  
Yucheng Zou ◽  
Zhen Zhang ◽  
Xuming Yang ◽  
Xiaobo Shi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Metal Electrode ◽  
Liquid Electrolyte ◽  
Battery Materials ◽  
Cryogenic Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Fluoroethylene Carbonate

AbstractCryogenic transmission electron microscopy (cryo-TEM) is a valuable tool recently proposed to investigate battery electrodes. Despite being employed for Li-based battery materials, cryo-TEM measurements for Na-based electrochemical energy storage systems are not commonly reported. In particular, elucidating the chemical and morphological behavior of the Na-metal electrode in contact with a non-aqueous liquid electrolyte solution could provide useful insights that may lead to a better understanding of metal cells during operation. Here, using cryo-TEM, we investigate the effect of fluoroethylene carbonate (FEC) additive on the solid electrolyte interphase (SEI) structure of a Na-metal electrode. Without FEC, the NaPF6-containing carbonate-based electrolyte reacts with the metal electrode to produce an unstable SEI, rich in Na2CO3 and Na3PO4, which constantly consumes the sodium reservoir of the cell during cycling. When FEC is used, the Na-metal electrode forms a multilayer SEI structure comprising an outer NaF-rich amorphous phase and an inner Na3PO4 phase. This layered structure stabilizes the SEI and prevents further reactions between the electrolyte and the Na metal.

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
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