Chemical aspect of oxygen dissolved in a dimethyl sulfoxide-based electrolyte on lithium metal

Lee, Hongkyung; Lee, Dong Jin; Lee, Je-Nam; Song, Jongchan; Lee, Yun-Ju; Ryou, Myung‐Hyun; Park, Jung-Ki; Lee, Yong Min

doi:10.1016/j.electacta.2014.01.042

Cited by 69 publications

(76 citation statements)

References 49 publications

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“…[52,60,63,65,68] We see from the above discussions that the presence of O 2 has ap rofound impact on the SEI layer, both its formation and the compositional changes.T he direct reactions between Li and O 2 genreate reactive oxygen species that may contribute to the degradation of the electrolyte.A dditionally,t he reductive nature of Li further limits the electrolyte choices. These issues call for as olution that may be met by as table artificial SEI layer (see Section 5).…”

Section: Summary Of Parasitic Chemical Reactions At the LI Anodementioning

confidence: 99%

“…Both positive and negative impacts to the cell stability due to these changes have been reported. [63,66] In the case of DMSO,t he increase of Li 2 Oe nhances the formation of LiOH, which lowers the Coulombic efficiency of the Li anode. [63,65] In the case of N 1114 TF 2 Ni onic liquid, however, more than 10 %i mprovement of the anode Coulombic efficiencies was observed in dry oxygen as compared to Ar atomsphere.I tw as found that O 2 helps reduce the thickness …”

Section: Synergy Between Oxygen and The Sei Formationmentioning

confidence: 99%

“…[52,63] Under ideal conditions,t he final product of these reactions would be Li 2 O. It can serve as an SEI layer to prevent further reactions between Li and O 2 ,a nd the amount of reduced oxygen species due to these reactions is negligible.But due to the poor quality of the SEI layer and also due to the dendritic growth of Li, the reactions between Li and O 2 have been found to be continuous during repeated cycling of Li-O 2 test cells.…”

Section: Reactivity Of Reduced Oxygen Species On the LI Surfacesmentioning

confidence: 99%

“…It can serve as an SEI layer to prevent further reactions between Li and O 2 ,a nd the amount of reduced oxygen species due to these reactions is negligible.But due to the poor quality of the SEI layer and also due to the dendritic growth of Li, the reactions between Li and O 2 have been found to be continuous during repeated cycling of Li-O 2 test cells. [52,60,63,64] It is therefore important to examine how the parasitic chemical reactions at the Li anode influence the overall stability of Li-O 2 batteries. Ther eactivity of superoxide species toward the electrolytes has been discussed in the previous section.…”

Section: Reactivity Of Reduced Oxygen Species On the LI Surfacesmentioning

confidence: 99%

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Why Do Lithium–Oxygen Batteries Fail: Parasitic Chemical Reactions and Their Synergistic Effect

et al. 2016

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Section: Summary Of Parasitic Chemical Reactions At the LI Anodementioning

confidence: 99%

Section: Synergy Between Oxygen and The Sei Formationmentioning

confidence: 99%

Section: Reactivity Of Reduced Oxygen Species On the LI Surfacesmentioning

confidence: 99%

Section: Reactivity Of Reduced Oxygen Species On the LI Surfacesmentioning

confidence: 99%

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Why Do Lithium–Oxygen Batteries Fail: Parasitic Chemical Reactions and Their Synergistic Effect

et al. 2016

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“…[23][24][25][26] However, the stability of the lithium metal electrode in contact with this electrolyte has been questioned (the effect of which is negated in proof of concept cells where a large excess of Li is used). This instability is because the reduction products of DMSO and the lithium salt do not form a stable passivation layer on the metal surface.…”

mentioning

confidence: 99%

Increased Cycling Efficiency of Lithium Anodes in Dimethyl Sulfoxide Electrolytes For Use in Li-O2 Batteries

Roberts

Younesi

Richardson

et al. 2014

ECS Electrochemistry Letters

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High lithium cycling efficiencies are required if a metal anode system is to be considered for use in Li-O 2 batteries. In this work electrolyte additives (0.3 M LiNO 3 and 0.14 M VC) were used to increase the efficiency from 25 to 82.5% in the topical DMSO based electrolyte. Furthermore, we show that oxygen also acts to improve the cycling efficiency to 87%. This work highlights the importance of anode considerations in the development of metal O 2 batteries in alternative solvents (DMSO, Acetonitrile and DMA) and suggests realistic strategies for performance improvements. The goal of a rechargeable Li-O 2 battery has stimulated many research studies in recent years. Practical estimates suggest that this system could provide a 2 to 5 times increase in energy density over current technologies.1-3 Ideal systems reduce oxygen during discharge (oxygen reduction reaction; ORR) forming of Li 2 O 2 which precipitates in the cathode architecture. Then on charging oxidize the Li 2 O 2 to form oxygen gas and lithium ions (oxygen evolution reaction; OER). The majority of studies have focused on lithium metal as the negative electrode (exceptions are silicon 4 or LiFePO 4 5 validation studies); here lithium metal is oxidized during discharge to form Li ions in solution which are then reduced back to metallic lithium on charge. The development of Li-O 2 batteries has been hampered by difficulties finding a stable electrolyte which allows these reactions to occur without accompanying decomposition.1,2,6,7 Many solvent systems have been investigated; with the majority of focus being on carbonates and ethers. However, carbonate solvents have been shown to have unstable cathode and anode performance. [8][9][10][11][12] Research into ether based solvents was initially more promising with the formation of Li 2 O 2 clearly demonstrated.13,14 However, sustained stable cycling has not been conclusively established. [15][16][17] This combined with the instability of ethers to Li 2 O 2 as well as auto-oxidation reactions suggests that this solvent system is also unrealistic. [18][19][20] Recently studies have demonstrated solvent stability during cycling in dimethylsulfoxide (DMSO), acetonitrile and N,Ndimethylacetamide (DMA) electrolytes. [21][22][23][24][25] However, these solvents are also known to be unstable in contact with lithium, therefor making the construction of real cells problematic.One of the most promising candidate electrolytes is dimethylsulfoxide (DMSO). [23][24][25][26] However, the stability of the lithium metal electrode in contact with this electrolyte has been questioned (the effect of which is negated in proof of concept cells where a large excess of Li is used). This instability is because the reduction products of DMSO and the lithium salt do not form a stable passivation layer on the metal surface. In this short letter we aim to highlight the concept of using electrolyte additives which can participate in the formation of an effective SEI layer which will act to protect the surface of the lithium metal.The e...

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Electrodes for Potassium Oxygen Batteries

Sharma

Kumar

2020

Potassium‐Ion Batteries

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Chemical aspect of oxygen dissolved in a dimethyl sulfoxide-based electrolyte on lithium metal

Cited by 69 publications

References 49 publications

Why Do Lithium–Oxygen Batteries Fail: Parasitic Chemical Reactions and Their Synergistic Effect

Why Do Lithium–Oxygen Batteries Fail: Parasitic Chemical Reactions and Their Synergistic Effect

Increased Cycling Efficiency of Lithium Anodes in Dimethyl Sulfoxide Electrolytes For Use in Li-O2 Batteries

Electrodes for Potassium Oxygen Batteries

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