Dendrite-free Li deposition using trace-amounts of water as an electrolyte additive

Qian, Jiangfeng; Xu, Wu; Bhattacharya, Priyanka; Engelhard, Mark H.; Henderson, Wesley A.; Zhang, Yaohui; Zhang, Ji‐Guang

doi:10.1016/j.nanoen.2015.04.009

Cited by 302 publications

(231 citation statements)

References 40 publications

Supporting

Mentioning

218

Contrasting

Order By: Relevance

“…Several pieces of information from literature works are worth mentioning at this point. First, in the work of Zhang et al , of which we adopted the method for Li nanorod preparation, XPS spectra exhibit strong signal of F element from the SEI formed on the Li nanorods, indicating the existence of rich amount of LiF in the SEI layer, which is as expected. Second, Raman spectra of Li 2 CO 3 and LiOH powders show strong bands of A g mode at 1093 cm −1 for Li 2 CO 3 and 331 and ca.…”

Section: Resultsmentioning

confidence: 96%

“…Then, 50 ppm water as an additive was added into 1 M LiPF 6 ‐PC and 1 M LiPF 6 ‐EC/DMC electrolyte, respectively. The electrolytes were then placed for at least 48 h before use to consume up all the added H 2 O by the chemical reaction LiPF 6 + H 2 O = POF 3 + LiF + 2HF …”

Section: Methodsmentioning

confidence: 99%

“…For electrodeposition of Li on Cu, a method recently reported by the group of Zhang was adopted with modification to form nanorod structure of Li deposit. Briefly, 50 ppm water was added into PC containing 1 M LiPF 6 followed by 48 h resting to allow the added water to react with LiPF 6 , forming LiF and HF via the solution reaction LiPF 6 + H 2 O = POF 3 + LiF + 2HF.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

An electrochemical surface‐enhanced Raman spectroscopic study on nanorod‐structured lithium prepared by electrodeposition

Tang

et al. 2016

J Raman Spectroscopy

View full text Add to dashboard Cite

Lithium is an s‐electron metal which is expected to support surface‐enhanced Raman scattering (SERS) effect. But the experimental investigation of the SERS effect of Li was reported once under high vacuum condition because of its extremely active surface chemistry. However, such investigations become increasingly important with stimulation by the active researches in lithium‐based batteries. In this paper, we present an electrochemical Raman spectroscopic study of electrochemically prepared Li surface combined with a simulation on the enhancement factor. Electrochemical roughening of Li foil surface and electrodeposition of Li on copper substrates are employed to prepare Li nanostructures. Only the nanorod arrays prepared by the electrodeposition on Cu in the electrolyte of LiPF6–PC–H2O or LiPF6–EC–DMC–H2O appear to be effective for obtaining the SERS effect. The spectra show two broad yet dominant bands at 720 and 1020 cm−1, which are considered to arise mainly from combined contribution by LiOH and LiF (720 cm−1) and LiF and Li2CO3 (1020 cm−1) contained in the solid‐electrolyte interphase (SEI) layer on the nanorod‐structured Li surface. The enhancement factor is calculated for coupled nanorods of ca. 240 nm in diameter, which is about 30 and 7 times for 638 and 532‐nm excitations, respectively. Experimentally, the signals with 638‐nm laser excitation are two to three times stronger than those with 532‐nm laser excitation. The SERS effect of Li may provide a useful and convenient in‐situ method to follow the SEI evolution process in lithium‐based batteries without introducing extra SPR active metals that may have impact on the performance of the Li anode. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

An electrochemical surface‐enhanced Raman spectroscopic study on nanorod‐structured lithium prepared by electrodeposition

Tang

et al. 2016

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…That is to say, the electric field directed Li growth along the applied electric field vertical to the Cu substrate at a constant rate, leading to a self-aligned Li nanorod structure. Directed by the same research group, trace amounts of water (25-50 ppm) were also found to play a similar role as Cs + and were introduced as electrolyte additives to control the morphology [344]. They found that the trace amount of HF formed from the side reactions of LiPF 6 and H 2 O can facilitate the formation of uniform and dense LiF-rich SEI layers on the substrate.…”

Section: Morphology Controlmentioning

confidence: 98%

Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

Yang

Adair

et al. 2018

Electrochem. Energ. Rev.

315

201

View full text Add to dashboard Cite

Lithium-sulfur (Li-S) batteries have been considered as one of the most promising energy storage devices that have the potential to deliver energy densities that supersede that of state-of-the-art lithium ion batteries. Due to their high theoretical energy density and cost-effectiveness, Li-S batteries have received great attention and have made great progress in the last few years. However, the insurmountable gap between fundamental research and practical application is still a major stumbling block that has hindered the commercialization of Li-S batteries. This review provides insight from an engineering point of view to discuss the reasonable structural design and parameters for the application of Li-S batteries. Firstly, a systematic analysis of various parameters (sulfur loading, electrolyte/sulfur (E/S) ratio, discharge capacity, discharge voltage, Li excess percentage, sulfur content, etc.) that influence the gravimetric energy density, volumetric energy density and cost is investigated. Through comparing and analyzing the statistical information collected from recent Li-S publications to find the shortcomings of Li-S technology, we supply potential strategies aimed at addressing the major issues that are still needed to be overcome. Finally, potential future directions and prospects in the engineering of Li-S batteries are discussed.

show abstract

“…Tremendous efforts have been made to solve these problems. Various types of electrolyte additives, such as Cs + [13], FEC [14], polysulfide [15][16], LiNO 3 [17][18], ionic liquid electrolytes [19] and H 2 O [20] have been used to form a stable and passivate layer on the Li metal anode. With adequately high shear modules to prevent the penetration of Li dendrites, solid electrolytes and gel polymer electrolytes have also been proposed to replace liquid electrolyte [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A lightweight carbon nanofiber-based 3D structured matrix with high nitrogen-doping level for lithium metal anodes

Zhang

Deng

et al. 2018

Sci. China Mater.

View full text Add to dashboard Cite

Lithium metal is considered to be the most promising anode material for the next-generation rechargeable batteries. However, the uniform and dendrite-free deposition of Li metal anode is hard to achieve, hindering its practical applications. Herein, a lightweight, free-standing and nitrogen-doped carbon nanofiber-based 3D structured conductive matrix (NCNF), which is characterized by a robust and interconnected 3D network with high doping level of 9.5 at%, is prepared by electrospinning as the current collector for Li metal anode. Uniform Li nucleation with reduced polarization and dendrite-free Li deposition are achieved because the NCNF with high nitrogen-doping level and high conductivity provide abundant and homogenous metallic Li nucleation and deposition sites. Excellent cycling stability with high coulombic efficiency are realized. The Li plated NCNF was paired with LiFePO 4 to assemble the full battery, also showing high cyclic stability.

show abstract

Dendrite-free Li deposition using trace-amounts of water as an electrolyte additive

Cited by 302 publications

References 40 publications

An electrochemical surface‐enhanced Raman spectroscopic study on nanorod‐structured lithium prepared by electrodeposition

An electrochemical surface‐enhanced Raman spectroscopic study on nanorod‐structured lithium prepared by electrodeposition

Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application

A lightweight carbon nanofiber-based 3D structured matrix with high nitrogen-doping level for lithium metal anodes

Contact Info

Product

Resources

About