A comparative analysis of the influence of hydrofluoroethers as diluents on solvation structure and electrochemical performance in non-flammable electrolytes

Ekeren, Wessel van; Albuquerque, Marcelo P. de; Ek, Gustav; Mogensen, Ronnie; Brant, William R.; Costa, Luciano T.; Brandell, Daniel; Younesi, Reza

doi:10.1039/d2ta08404j

Cited by 20 publications

(26 citation statements)

References 67 publications

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“…S17, ESI †) is consistent with previous studies. 30,44 These results provide strong support to the experimental results and confirm the decrease of CIPs in both the Mg(TFSI) 2 /DME:TEP and Mg(TFSI) 2 /CEPE electrolytes.…”

Section: Optimized Solvation Structures Of Mg 2+supporting

confidence: 83%

A weakly ion pairing electrolyte designed for high voltage magnesium batteries

Li,

Guha,

Shyamsunder

et al. 2024

Energy Environ. Sci.

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Section: Optimized Solvation Structures Of Mg 2+supporting

confidence: 83%

A weakly ion pairing electrolyte designed for high voltage magnesium batteries

Li,

Guha,

Shyamsunder

et al. 2024

Energy Environ. Sci.

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“…Valuable information about the interactions between different functional groups/molecules can be provided by NMR, especially when employing two‐dimensional NMR (2D‐NMR). [ 107,108 ] Two‐dimensional NMR collects signals in two frequency dimensions, usually referred to as F1 and F2. Wahyudi et al [ 62 ] used 2D‐NMR to elucidate the weak long‐range interactions between solvent–anion and solvent–solvent in electrolytes in Figure 8B.…”

Section: Advanced Characterization and Analysis Techniques For Soluti...mentioning

confidence: 99%

Towards stable electrode–electrolyte interphases: Regulating solvation structures in electrolytes for rechargeable batteries

Ma,

Huang,

Ling

et al. 2023

Interdisciplinary Materials

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Rechargeable batteries are highly in demand to power various electronic devices and future smart electric grid energy storage. The electrode–electrolyte interphases play a crucial role in influencing the electrochemical performance of batteries, with the solvation chemistries of the electrolyte being particularly significant in regulating these interfacial reactions. However, the reaction mechanisms of electrolyte solvation and their specific functions in batteries are not yet fully understood. In this review, we embark on an exploration of the fundamental principles governing solvation and present a comprehensive overview of how solvation structures impact interfacial reactions at the electrode–electrolyte interface. We underscore the significance of interactions among cations, anions, and solvents in shaping electrolyte solvation structures. The primary strategies for controlling solvation structures are also discussed, including the optimization of salt concentrations, solvent interactions, and the introduction of functional cosolvents. Furthermore, we elucidate the oxidation/reduction reaction mechanisms of electrolyte components in different solvation structures and the new understanding of electrolyte additives in modulating interfacial chemistries in batteries. Additionally, we emphasize the importance of incorporating new characterization techniques and theoretical simulations to attain a deeper understanding of the intricate processes taking place within batteries. This review provides an in‐depth understanding in solvations and interphasial properties and new ideas for designing advanced functional electrolytes for rechargeable batteries.

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“…To further exclude anionic film-forming factor, LiPF 6 is replaced by LiClO 4 without film-forming ability. 36 As displayed in Figure 1h, the Gr anode still loses the ability to deliver reversible lithium intercalation reactions in L-3P5E. In contrast, the Gr anodes in L-2P3E afford excellent performance with a capacity retention of up to 86.4% over 100 cycles (Figure S10).…”

mentioning

confidence: 98%

“…The radial distribution function g(r) displays a distinct peak at approximately 0.2 nm, representing the PSS of Li + (Figure S11a and Figure 3c). 8,36 According to the magnitude of g(r), the interaction intensity to Li + follows the decreasing tendency of PF 6 − , TEP, to EC (Figure S11b and Figure 3d), consistent with the E a results of Li + −solvent (Figure 1c).…”

mentioning

confidence: 98%

Ethylene Carbonate Regulated Solvation of Triethyl Phosphate to Enable High-Conductivity, Nonflammable, and Graphite Compatible Electrolyte

Liu,

Zeng,

et al. 2023

ACS Energy Lett.

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In the landscape of lithium-ion batteries (LIBs), carbonate-based electrolytes have driven remarkable progress, but persistent safety concerns stemming from their flammability necessitate innovative solutions. This study explores a cost-effective nonflammable cosolvent, triethyl phosphate (TEP), to counter the risk. However, TEP's strong Li + -coordinating propensity adversely affects graphite (Gr) electrode intercalation. To surmount these challenges, we unveil the competitive coordination behavior of TEP and ethylene carbonate, strategically optimizing TEP's coordination numbers. This tailored approach culminates in a dynamically stable structure which reduces the adverse effects of TEP. Leveraging these insights, we engineer a TEP-modified carbonate electrolyte with standard Li salt concentration (1 M) boasting both nonflammability and high ionic conductivity, enabling the Gr anode to achieve ∼100% capacity retention after 150 cycles. Additionally, this formulation significantly minimizes fire and explosion risks in 4 A h Gr||LiNi 0.9 Co 0.05 Mn 0.05 O 2 pouch cells during mechanical stress, demonstrating profound implications for safer energy storage in LIBs.

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A comparative analysis of the influence of hydrofluoroethers as diluents on solvation structure and electrochemical performance in non-flammable electrolytes

Abstract: To enhance battery safety, it is of utmost importance to develop non-flammable electrolytes. An emerging concept within this research field is the development of localized highly concentrated electrolytes (LHCEs). This...

Cited by 20 publications

References 67 publications

A weakly ion pairing electrolyte designed for high voltage magnesium batteries

A weakly ion pairing electrolyte designed for high voltage magnesium batteries

Towards stable electrode–electrolyte interphases: Regulating solvation structures in electrolytes for rechargeable batteries

Ethylene Carbonate Regulated Solvation of Triethyl Phosphate to Enable High-Conductivity, Nonflammable, and Graphite Compatible Electrolyte

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