Interfacial challenges towards stable Li metal anode

Luo, Zheng; Qiu, Xuejing; Liu, Cheng; Li, Shuo; Wang, Chi-Wei; Zou, Guoqiang; Hou, Hongshuai; Ji, Xiaobo

doi:10.1016/j.nanoen.2020.105507

Cited by 135 publications

(91 citation statements)

References 210 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, significant challenges in terms of safety and practicality persist for Li metal anode-based batteries (LMBs) that originate from the thermodynamic instability of Li metal with organic solvents [ 2 ] and the long-term inefficiency of the Li plating/stripping process during cycling [ 3 ]. The repeated cycling of the Li anode can facilitate the propagation of Li dendrites and a continuous reaction between Li metal and the electrolyte, resulting in the loss of active material and a shortened cycle life [ 4 , 5 , 6 , 7 , 8 ]. One strategy that can prevent dendrite growth and prolong the cycle life of LMBs is the formation of a stable (in situ) solid electrolyte interphase (SEI) layer, which consists of a thin film of reaction products immediately formed after contact between the electrolyte and the Li anode [ 2 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…One strategy that can prevent dendrite growth and prolong the cycle life of LMBs is the formation of a stable (in situ) solid electrolyte interphase (SEI) layer, which consists of a thin film of reaction products immediately formed after contact between the electrolyte and the Li anode [ 2 , 8 , 9 , 10 ]. Ideally, the SEI layer is compact and remains intact during cycling to prevent the loss of active materials and to minimise Li dendrite growth [ 4 , 11 ]. Traditional organic carbonate-based electrolytes have high volatility, flammability, and will form an SEI layer on Li metal with poor chemical stability and mechanical strength [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fluorinated Boron-Based Anions for Higher Voltage Li Metal Battery Electrolytes

et al. 2021

View full text Add to dashboard Cite

Lithium metal batteries (LMBs) require an electrolyte with high ionic conductivity as well as high thermal and electrochemical stability that can maintain a stable solid electrolyte interphase (SEI) layer on the lithium metal anode surface. The borate anions tetrakis(trifluoromethyl)borate ([B(CF3)4]−), pentafluoroethyltrifluoroborate ([(C2F5)BF3]−), and pentafluoroethyldifluorocyanoborate ([(C2F5)BF2(CN)]−) have shown excellent physicochemical properties and electrochemical stability windows; however, the suitability of these anions as high-voltage LMB electrolytes components that can stabilise the Li anode is yet to be determined. In this work, density functional theory calculations show high reductive stability limits and low anion–cation interaction strengths for Li[B(CF3)4], Li[(C2F5)BF3], and Li[(C2F5)BF2(CN)] that surpass popular sulfonamide salts. Specifically, Li[B(CF3)4] has a calculated oxidative stability limit of 7.12 V vs. Li+/Li0 which is significantly higher than the other borate and sulfonamide salts (≤6.41 V vs. Li+/Li0). Using ab initio molecular dynamics simulations, this study is the first to show that these borate anions can form an advantageous LiF-rich SEI layer on the Li anode at room (298 K) and elevated (358 K) temperatures. The interaction of the borate anions, particularly [B(CF3)4]−, with the Li+ and Li anode, suggests they are suitable inclusions in high-voltage LMB electrolytes that can stabilise the Li anode surface and provide enhanced ionic conductivity.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fluorinated Boron-Based Anions for Higher Voltage Li Metal Battery Electrolytes

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, the choice of this facet maximizes the performance of the anode. The use of F 2 gas in the preparation of the Li foil is thus preferred, as it led to the Li(100) surface, while N 2 , O 2 , and CO 2 led to Li (110) [107]. When Li is deposited on a Cu substrate, the surface of Cu is oriented with a (100) face, which is the most appropriate orientation for achieving lattice coincidence with the Li (110) plane [108].…”

Section: Gas Processingmentioning

confidence: 99%

Remedies to Avoid Failure Mechanisms of Lithium-Metal Anode in Li-Ion Batteries

Mauger

Julien

2021

Inorganics

View full text Add to dashboard Cite

Rechargeable lithium-metal batteries (LMBs), which have high power and energy density, are very attractive to solve the intermittence problem of the energy supplied either by wind mills or solar plants or to power electric vehicles. However, two failure modes limit the commercial use of LMBs, i.e., dendrite growth at the surface of Li metal and side reactions with the electrolyte. Substantial research is being accomplished to mitigate these drawbacks. This article reviews the different strategies for fabricating safe LMBs, aiming to outperform lithium-ion batteries (LIBs). They include modification of the electrolyte (salt and solvents) to obtain a highly conductive solid–electrolyte interphase (SEI) layer, protection of the Li anode by in situ and ex situ coatings, use of three-dimensional porous skeletons, and anchoring Li on 3D current collectors.

show abstract

“…LMBs have unpredictable Li dendrites growing on Li metal surface during operation. Li dendrites result in a reduction of lifespan, explosion, and low coulombic efficiency of batteries [9]. Currently, many studies are being conducted to suppress Li dendrite growth.…”

Section: Introductionmentioning

confidence: 99%

Design and Manufacturing of Low Relative Humidity Chamber for Laser Processing of Lithium Metal

Park¹,

Lee²

2021

Preprint

View full text Add to dashboard Cite

In order to overcome the energy density limitations of lithium-ion batteries consisting of graphite anodes, studies on lithium metal batteries (LMBs) have been actively conducted. However, most LMBs related studies focus on suppressing the growth of unpredictable dendrites. Research for production processes has been rarely conducted. In the paper, laser processing is introduced to improve the drawback of conventional processing for Li metal. Moreover, a low humidity maintenance chamber is manufactured to prevent oxidation of Li metal during laser processing because Li metal easily reacts with moisture. The chamber has a closed space that does not allow outside air to enter, and a glass that allows the laser beam to pass through is installed at the upper part. In addition, silica gel is installed to maintain low relative humidity. The dew point inside the chamber drops to -17.4 ℃ in 1 hour. This result implies that the chamber can prevent Li metal oxidation. Next, we analyze the effect of transparent plate glass on laser beam with Gaussian distribution. Finally, it is confirmed through experiments that lithium metal is not contaminated by moisture during laser processing using a manufactured chamber.

show abstract

Interfacial challenges towards stable Li metal anode

Cited by 135 publications

References 210 publications

Fluorinated Boron-Based Anions for Higher Voltage Li Metal Battery Electrolytes

Fluorinated Boron-Based Anions for Higher Voltage Li Metal Battery Electrolytes

Remedies to Avoid Failure Mechanisms of Lithium-Metal Anode in Li-Ion Batteries

Design and Manufacturing of Low Relative Humidity Chamber for Laser Processing of Lithium Metal

Contact Info

Product

Resources

About