2023
DOI: 10.1002/anie.202305988
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Insights into Anion‐Solvent Interactions to Boost Stable Operation of Ether‐Based Electrolytes in Pure‐SiOx||LiNi0.8Mn0.1Co0.1O2 Full Cells

Abstract: Ether solvents with superior reductive stability promise excellent interphasial stability with high‐capacity anodes while the limited oxidative resistance hinders their high‐voltage operation. Extending the intrinsic electrochemical stability of ether‐based electrolytes to construct stable‐cycling high‐energy‐density lithium‐ion batteries is challenging but rewarding. Herein, the anion‐solvent interactions were concerned as the key point to optimize the anodic stability of the ether‐based electrolytes and an o… Show more

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Cited by 29 publications
(8 citation statements)
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“…The anion–solvent interaction is beneficial for regulating and promoting the anion‐rich solvation structure in bulk electrolytes, enhancing the oxidative stability of DMC and the anion‐derived interphase. [ 37 ] Such results have not been hitherto reported. In general, there are two strategies to obtain a salt anion‐rich solvation structure: [ 38 ] increasing the Li salt concentration to force more salt anions to coordinate with Li + and decreasing the coordination by weakening the interaction between Li + and solvents.…”
Section: Resultsmentioning
confidence: 83%
“…The anion–solvent interaction is beneficial for regulating and promoting the anion‐rich solvation structure in bulk electrolytes, enhancing the oxidative stability of DMC and the anion‐derived interphase. [ 37 ] Such results have not been hitherto reported. In general, there are two strategies to obtain a salt anion‐rich solvation structure: [ 38 ] increasing the Li salt concentration to force more salt anions to coordinate with Li + and decreasing the coordination by weakening the interaction between Li + and solvents.…”
Section: Resultsmentioning
confidence: 83%
“…The two signals at 913.4 and 919.6 cm À 1 are assigned to the ring breathing mode of CÀ OÀ C in free THF and 2MeTHF, respectively. [10] With the addition of NaPF 6 , the coordinated THF and 2MeTHF peaks in N-mixTHF negatively shift from 914.3 and 920.3 cm À 1 to 913.7 and 919.8 cm À 1 , respectively, suggesting the weakened Na + -solvent interactions in N-mixTHF, as shown in Figure S2 and Table S1. The peak at 738.8 cm À 1 is ascribed to the stretching vibration of solvated PF 6 À , which shifts negatively from 761.8 cm À 1 compared to solid NaPF 6 salt.…”
Section: Resultsmentioning
confidence: 92%
“…The NaF (16.2 %) on Na 3 V 2 (PO 4 ) 3 surface is still higher than LE system (14.3 %) (Figure 5f). [28–29] Meanwhile, the EIS of Na || Na 3 V 2 (PO 4 ) 3 at different electrochemical states upon initial charge process (Figure S36) shows that PLA‐NaF GPE assembled cell has the smaller interfacial impendence compared with LE after charge to 4.0 V, suggesting that a high ion transport interface is formed.…”
Section: Resultsmentioning
confidence: 99%