Bridging role of ethyl methyl carbonate in fluorinated electrolyte on ionic transport and phase stability for lithium-ion batteries

Bezabh, Hailemariam Kassa; Chiu, Shuo-Feng; Hagos, Teklay Mezgebe; Tsai, Meng‐Che; Nikodimos, Yosef; Redda, Haylay Ghidey; Su, Wei‐Nien; Hwang, Bing‐Joe

doi:10.1016/j.jpowsour.2021.229760

Cited by 25 publications

(25 citation statements)

References 53 publications

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“…It has been reported that H-abstraction may accompany oxidation of solvents or additives. 38,70,71 We calculated the change in oxidation voltage when H-abstraction is involved. Even considering H-abstraction, there was no change in the finding that oxidation of DME occurs much more easily than oxidation of FEC.…”

Section: Identification Of the Molecules Associated With Cei Formatio...mentioning

confidence: 99%

“…The last method involves the oxidation potential (OP) and reduction potential (RP). [31][32][33][34][35][36][37][38][39][40] The OP/RP calculations consider not only the material property derived from IP/EA but also the solvent effect, thereby achieving actively progressing research on redox potential. If a material has a low OP value, it contributes more easily to CEI formation.…”

Section: Introductionmentioning

confidence: 99%

“…Because of these limitations, IP and EA are not widely used in interpreting experimental results. The last method involves the oxidation potential (OP) and reduction potential (RP) 31‐40 . The OP/RP calculations consider not only the material property derived from IP/EA but also the solvent effect, thereby achieving actively progressing research on redox potential.…”

Section: Introductionmentioning

confidence: 99%

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Radical reactivity evaluation for the identification of electrolyte materials involved in electrode–electrolyte interphase formation

Choi

Han

2022

Intl J of Energy Research

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The use of Li metal anodes for secondary batteries is a major challenge in the academe. To address the issues associated with this, there is active research to obtain electrolytes for the effective use of Li metal anodes. Specifically, there is considerable attention on improving the oxidation stability and suppressing the dendrite formations of Li metal through the formation of a passivation film on cathode and anode surfaces. However, there is limited knowledge on the correlation between electrolyte molecules and formation of passivation films at a molecular level, which prevents the efficient development of highperformance electrolytes. In this work, we analyze reported experimental results on materials that contribute to the formation of cathode and anode films in widely used ether-based electrolytes through first-principles calculations. The oxidation and reduction energies are found to be insufficient in

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Section: Identification Of the Molecules Associated With Cei Formatio...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Radical reactivity evaluation for the identification of electrolyte materials involved in electrode–electrolyte interphase formation

Choi

Han

2022

Intl J of Energy Research

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“…As a function of Li salt in solvents with additives, Li + solvation structure could determine many properties of the electrolytes, and especially the structural model Li + [solvent] x [additive] y [anion] has been proposed to explain battery performance 30,32 . The precise control of solvation structure can eliminate the adverse effects of some solvent molecules 33–38 . For example, Ming et al 38 found that the formed Li + ‐EC complex in EC‐contained electrolyte was crucial to stabilizing the electrolytes.…”

Section: Introductionmentioning

confidence: 99%

“…30,32 The precise control of solvation structure can eliminate the adverse effects of some solvent molecules. [33][34][35][36][37][38] For example, Ming et al 38 found that the formed Li + -EC complex in EC-contained electrolyte was crucial to stabilizing the electrolytes. Highconcentration electrolyte (HCE) and others could greatly reduce the number of solvent-separated ion pair (SSIP) structures and free solvent molecules, which is mainly composed of contact ion pair (CIP) and aggregates (AGGs).…”

Section: Introductionmentioning

confidence: 99%

Structural regulation chemistry of lithium ion solvation for lithium batteries

Wang

et al. 2022

EcoMat

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The performance of Li batteries is influenced by the Li+ solvation structure, which can be precisely adjusted by the components of the electrolytes. In this review, we overview the strategies for optimizing electrolyte solvation structures from three different perspectives, including anion regulation, binding energy regulation, and additive regulation. These strategies can optimize the composition of the electrode‐electrolyte interface, enhance the anti‐oxidative stability of electrolytes as well as regulate the behaviors of anions, solvents, and Li+ during the cycling process. Moreover, we also provide our insights into these aspects as well as present perspectives on high‐performance Li batteries.

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Does Salt Concentration Matter? New Insights on the Intercalation Behavior of PF6−${\rm{PF}}_6^ - $ into Graphite Cathode for the Dual‐Ion Battery

Guan

Wang

Chen³

et al. 2023

Adv Funct Materials

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A high-concentration electrolyte is favored in dual-ion batteries (DIBs) due to the lower onset potential for anion intercalation, higher specific discharge capacity, and better oxidation stability. Inspired by the correlation between the high-concentration electrolytes and localized high-concentration electrolytes, it is suspected that it is not the salt concentration but the solution structure of the electrolyte that determines the intercalation behavior of anion into graphite cathode. To prove the viewpoint, a series of electrolytes are prepared by controlling the salt concentration or solution structure and the intercalation behavior of PF 6 − within the graphite cathode is investigated in Li||graphite and graphite||graphite cells. It is found that PF 6 − anions exhibit similar onset potentials and specific discharge capacities in the electrolytes with different salt concentrations but similar solution structures. This study provides a new perspective on designing promising electrolytes for DIBs, which can accelerate the further exploitation of high-performance DIBs.

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Bridging role of ethyl methyl carbonate in fluorinated electrolyte on ionic transport and phase stability for lithium-ion batteries

Cited by 25 publications

References 53 publications

Radical reactivity evaluation for the identification of electrolyte materials involved in electrode–electrolyte interphase formation

Radical reactivity evaluation for the identification of electrolyte materials involved in electrode–electrolyte interphase formation

Structural regulation chemistry of lithium ion solvation for lithium batteries

Does Salt Concentration Matter? New Insights on the Intercalation Behavior of PF6−${\rm{PF}}_6^ - $ into Graphite Cathode for the Dual‐Ion Battery

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