Resolving the Phase Instability of a Fluorinated Ether, Carbonate-Based Electrolyte for the Safe Operation of an Anode-Free Lithium Metal Battery

2020 ◽  
Vol 3 (11) ◽  
pp. 10722-10733
Author(s):  
Teklay Mezgebe Hagos ◽  
Tesfaye Teka Hagos ◽  
Hailemariam Kassa Bezabh ◽  
Gebregziabher Brhane Berhe ◽  
Ljalem Hadush Abrha ◽  
...  
Keyword(s):  
Lithium Metal ◽  
Safe Operation ◽  
Phase Instability ◽  
Lithium Metal Battery ◽  
Fluorinated Ether

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.

Regulation of SEI Formation by Anion Receptors to Achieve Ultra‐Stable Lithium Metal Battery

2021 ◽  
Author(s):  
Kangsheng Huang ◽  
Sheng Bi ◽  
Barış Kurt ◽  
Chengyang Xu ◽  
Langyuan Wu ◽  
...  
Keyword(s):  
Anion Receptors ◽  
Lithium Metal ◽  
Lithium Metal Battery

Epitaxial Induced Plating Current‐Collector Lasting Lifespan of Anode‐Free Lithium Metal Battery

2021 ◽  
pp. 2003709
Author(s):  
Liangdong Lin ◽  
Liumin Suo ◽  
Yong‐sheng Hu ◽  
Hong Li ◽  
Xuejie Huang ◽  
...  
Keyword(s):  
Current Collector ◽  
Lithium Metal ◽  
Lithium Metal Battery

nCocktail Therapy towards High Temperature/High Voltage Lithium Metal Battery via Solvation Sheath Structure Tuning

2021 ◽  
Author(s):  
Tianle Zheng ◽  
Jianwei Xiong ◽  
Xiaotang Shi ◽  
Bingying Zhu ◽  
Ya-Jun Cheng ◽  
...  
Keyword(s):  
High Temperature ◽  
High Voltage ◽  
Lithium Metal ◽  
Lithium Metal Battery ◽  
Sheath Structure

Sulfur and nitrogen codoped Nb2C MXene for dendrite-free lithium metal battery

2021 ◽  
pp. 138812
Author(s):  
Wenyang Zhang ◽  
Huixin Jin ◽  
Yiqun Du ◽  
Guowen Chen ◽  
Jianxin Zhang
Keyword(s):  
Lithium Metal ◽  
Lithium Metal Battery
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