Gradient SEI layer Induced by Liquid Alloy Electrolyte Additive for High Rate Lithium Metal Battery

Nano Energy ◽  
2021 ◽  
pp. 106237
Author(s):  
Weina Xu ◽  
Xiaobin Liao ◽  
Congli Sun ◽  
Wangwang Xu ◽  
Kangning Zhao ◽  
...  
Keyword(s):  
Liquid Alloy ◽  
High Rate ◽  
Lithium Metal ◽  
Electrolyte Additive ◽  
Sei Layer ◽  
Lithium Metal Battery

scholarly journals Diphenyl Azidophosphate as a Functional Electrolyte Additive for High-Conductivity Film Construction over Lithium Metal Battery

2021 ◽  
Vol 168 (9) ◽  
pp. 090530
Author(s):  
Fuyang Jiang ◽  
Hao Zheng ◽  
Liu Hong ◽  
Yueda Wang ◽  
Yongchao Liu ◽  
...  
Keyword(s):  
High Conductivity ◽  
Lithium Metal ◽  
Electrolyte Additive ◽  
Lithium Metal Battery

Grain‐Boundary‐Rich Artificial SEI Layer for High‐Rate Lithium Metal Anodes

2021 ◽  
pp. 2107249
Author(s):  
Chao Chen ◽  
Qianwen Liang ◽  
Gang Wang ◽  
Dongdong Liu ◽  
Xunhui Xiong
Keyword(s):  
Grain Boundary ◽  
High Rate ◽  
Lithium Metal ◽  
Sei Layer ◽  
Lithium Metal Anodes ◽  
Metal Anodes

scholarly journals Lithium metal stripping beneath the solid electrolyte interphase

2018 ◽  
Vol 115 (34) ◽  
pp. 8529-8534 ◽  
Author(s):  
Feifei Shi ◽  
Allen Pei ◽  
David Thomas Boyle ◽  
Jin Xie ◽  
Xiaoyun Yu ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
High Rate ◽  
Lithium Cation ◽  
Lithium Metal ◽  
Rate Determining Step ◽  
Sei Layer ◽  
Lithium Deposition ◽  
Vigorous Growth ◽  
Local Dissolution

Lithium stripping is a crucial process coupled with lithium deposition during the cycling of Li metal batteries. Lithium deposition has been widely studied, whereas stripping as a subsurface process has rarely been investigated. Here we reveal the fundamental mechanism of stripping on lithium by visualizing the interface between stripped lithium and the solid electrolyte interphase (SEI). We observed nanovoids formed between lithium and the SEI layer after stripping, which are attributed to the accumulation of lithium metal vacancies. High-rate dissolution of lithium causes vigorous growth and subsequent aggregation of voids, followed by the collapse of the SEI layer, i.e., pitting. We systematically measured the lithium polarization behavior during stripping and find that the lithium cation diffusion through the SEI layer is the rate-determining step. Nonuniform sites on typical lithium surfaces, such as grain boundaries and slip lines, greatly accelerated the local dissolution of lithium. The deeper understanding of this buried interface stripping process provides beneficial clues for future lithium anode and electrolyte design.

Scallion-Inspired Graphene Scaffold Enabled High Rate Lithium Metal Battery

Nano Letters ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2347-2355
Author(s):  
Tao Ma ◽  
Ting-Yu Su ◽  
Long Zhang ◽  
Ji-Wen Yang ◽  
Hong-Bin Yao ◽  
...  
Keyword(s):  
High Rate ◽  
Lithium Metal ◽  
Lithium Metal Battery

An artificial hybrid interphase endowing ultrahigh-rate and practical lithium metal anode

2021 ◽  
Author(s):  
Anjun Hu ◽  
Wei Chen ◽  
Xinchuan Du ◽  
Yin Hu ◽  
Tianyu Lei ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Rechargeable Batteries ◽  
High Rate ◽  
Lithium Metal ◽  
Metal Anode ◽  
Sei Layer ◽  
Lithium Metal Anode ◽  
Artificial Hybrid

The solid-electrolyte interphase (SEI) layer is pivotal for the stable and rechargeable batteries especially under high rate. However, the mechanism of Li+ transport through the SEI has not been clearly...

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.

Lithiophilic and Conductive V2O3/VN Nanosheets as Regulating Layer for High-Rate, High-Areal Capacity and Dendrite-Free Lithium Metal Anodes

2021 ◽  
pp. 129787
Author(s):  
Yonghuan Han ◽  
Zhiyuan Sang ◽  
Daolan Liu ◽  
Tao Zhang ◽  
Jianmin Feng ◽  
...  
Keyword(s):  
High Rate ◽  
Lithium Metal ◽  
Lithium Metal Anodes ◽  
Areal Capacity ◽  
Metal Anodes
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