Synergistic effects between dual salts and Li nitrate additive in ether electrolytes for Li-metal anode protection in Li secondary batteries

Afrifah, Vera Afumaa; Kim, Jung Min; Lee, Yongmin; Phiri, Isheunesu; Lee, Young-Gi; Ryou, Myung‐Hyun

doi:10.1016/j.jpowsour.2022.232017

Cited by 14 publications

(5 citation statements)

References 45 publications

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“…The obviously improved performance via IPFB exceeds many works utilizing additives based on the applied areal capacity on cell (Figure f, Table S1). − The EIS plots of Li||Li cells were also measured to evaluate the interfacial Li + transfer behavior (Figure g–i). The charge-transfer impedance ( R ct ) after cycling with the existence of IPFB is smaller than that of a pristine cell, indicating the improved Li + transfer efficiency at the interface of the Li anode .…”

Section: Resultsmentioning

confidence: 99%

Regulation of a Solid-Electrolyte Interphase and Ion Transfer via Organic Lewis Acid for Stable Li–S Pouch Cells

Li,

Yang

2024

ACS Appl. Energy Mater.

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Li–S batteries have good application potential due to their high theoretical energy density/capacity, being widely studied in recent years. However, due to the high reactivity between Li and S and the low efficiency of ion transfer in electrolyte, side reactions and Li dendrite growth could easily happen and reduce the stability or the cycling life of Li–S batteries. In this work, a kind of Lewis acid, i.e., iodopentafluorobenzene (IPFB), is adopted as an electrolyte additive to regulate ion configurations and SEI formation. The Lewis acid property of IPFB could help adsorb anions in electrolyte, which could participate in SEI formation and weaken local space charge near the anode surface, hence realizing a uniform ion distribution and Li deposition. As a result, a long cycling stability of Li||Li cells for over 600 h at 3 mA cm–2 under 3 mAh cm–2 and a 40-cycle high stability at 0.4 C of Li–S pouch cells are achieved. The induction of Lewis acid into electrolytes could be a potential and facile strategy for realizing uniform Li deposition and high-performance Li–S pouch cells.

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Section: Resultsmentioning

confidence: 99%

Regulation of a Solid-Electrolyte Interphase and Ion Transfer via Organic Lewis Acid for Stable Li–S Pouch Cells

Li,

Yang

2024

ACS Appl. Energy Mater.

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“…The other two electrolytes contain 1 wt % LiNO 3 and additional 2 wt % vinylene carbonate (VC) in the former, which are abbreviated here as BE-N and BE-NV, respectively. LiNO 3 , originally utilized to suppress dendrites and inhibit the “shuttle effect” in lithium–sulfur batteries, is a well-known additive for forming highly ion-conductive SEI with Li 3 N and LiN x O y . ,− VC, one of the widely used additives in Li ion batteries, is known to form a stable SEI by its polymerization to poly(VC) within SEI. , TFOFE and LiPO 2 F 2 are conventionally utilized to minimize the degradation occurring at the cathode in the Li|NCM full-cell system, as they are known to increase oxidative stability and form robust CEI, thereby allowing us to focus solely on the Li anode in this study. ,, …”

Section: Resultsmentioning

confidence: 99%

Additive-Driven Nanoscale Architecture of Solid Electrolyte Interphase Revealed by Cryogenic Transmission Electron Microscopy

Park,

Jeon,

Park

et al. 2024

ACS Nano

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In Li metal batteries (LMBs), which boast the highest theoretical capacity, the chemical structure of the solid electrolyte interphase (SEI) serves as the key component that governs the growth of reactive Li. Various types of additives have been developed for electrolyte optimization, representing one of the most effective strategies to enhance the SEI properties for stable Li plating. However, as advanced electrolyte systems become more chemically complicated, the use of additives is empirically optimized. Indeed, their role in SEI formation and the resulting cycle life of LMBs are not well-understood. In this study, we employed cryogenic transmission electron microscopy combined with Raman spectroscopy, theoretical studies including molecular dynamics (MD) simulations and density functional theory (DFT) calculations, and electrochemical measurements to explore the nanoscale architecture of SEI modified by the most representative additives, lithium nitrate (LiNO 3 ) and vinylene carbonate (VC), applied in a localized high-concentration electrolyte. We found that LiNO 3 and VC play distinct roles in forming the SEI, governing the solvation structure, and influencing the kinetics of electrochemical reduction. Their collaboration leads to the desired SEI, ensuring prolonged cycle performance for LMBs. Moreover, we propose mechanisms for different Li growth and cycling behaviors that are determined by the physicochemical properties of SEI, such as uniformity, elasticity, and ionic conductivity. Our findings provide critical insights into the appropriate use of additives, particularly regarding their chemical compatibility.

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“…10 There exist multiple approaches to mitigate the formation and growth of lithium dendrites. 8 For example, these approaches include the use of electrolyte additives like LiNO 3 , 11 Li 2 S, 12 and CsPF 6 , 13 as well as the construction of 3D fluid collection and artificially designed SEI membranes, utilizing materials like Li 3 N and PVDF-HFP. [11][12][13][14][15][16] However, previous research on artificial solid electrolytes has often involved the use of expensive and hazardous organic solvents.…”

Section: Introductionmentioning

confidence: 99%

“…8 For example, these approaches include the use of electrolyte additives like LiNO 3 , 11 Li 2 S, 12 and CsPF 6 , 13 as well as the construction of 3D fluid collection and artificially designed SEI membranes, utilizing materials like Li 3 N and PVDF-HFP. [11][12][13][14][15][16] However, previous research on artificial solid electrolytes has often involved the use of expensive and hazardous organic solvents. 17 To overcome these challenges, researchers have explored the incorporation of natural polymers in battery manufacturing, which offers a greener approach with minimal use of harmful organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Suppressing Li dendrite by a guar gum natural polymer film for high‐performance lithium metal anodes

Fei,

Du,

Liu

et al. 2024

J of Applied Polymer Sci

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Lithium dendrites pose a major hurdle for enhancing the energy density of lithium metal batteries, and the artificial solid electrolyte interface layer offers a potential solution. In this work, a cost‐effective and environmentally friendly guar gum film is applied to the artificial protective layer. The guar gum artificial solid electrolyte interface (SEI) layer formed naturally, enriched with OH and AOA groups, displayed exceptional electrochemical stability, and achieved an impressively high transference number of 0.88 for lithium‐ion movement. In symmetric cells, the Li@GG‐Cu anode displays remarkable cycling performance even during extended periods. This is evidenced by its ability to maintain a surface capacity of approximately 850 h (1 mA cm−2, 1 mAh cm−2). In addition, when utilizing a complete cell setup comprising a LiFPO4 cathode (weighing 1.5 mg cm−2) and anode coated with a guar gum film, the capacity retention of an impressive 96.2% showcases outstanding preservation of battery performance over time even after 700 cycles. This performance surpasses that of a lithium foil electrode (87.1%) and a copper anode with lithium deposition (0%). Our work exhibits a promising material for a novel configuration of artificial SEI, effectively stabilizing lithium metal anode.

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Synergistic effects between dual salts and Li nitrate additive in ether electrolytes for Li-metal anode protection in Li secondary batteries

Cited by 14 publications

References 45 publications

Regulation of a Solid-Electrolyte Interphase and Ion Transfer via Organic Lewis Acid for Stable Li–S Pouch Cells

Regulation of a Solid-Electrolyte Interphase and Ion Transfer via Organic Lewis Acid for Stable Li–S Pouch Cells

Additive-Driven Nanoscale Architecture of Solid Electrolyte Interphase Revealed by Cryogenic Transmission Electron Microscopy

Suppressing Li dendrite by a guar gum natural polymer film for high‐performance lithium metal anodes

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