Volume 136, Issue 41 e202403432
Forschungsartikel

Stable Lithium Oxygen Batteries Enabled by Solvent-diluent Interaction in N,N-dimethylacetamide-based Electrolytes

Dong-Yue Yang

Dong-Yue Yang

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China.

School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China.

These authors contributed equally to this work.

Contribution: ​Investigation (lead), Methodology (lead), Writing - original draft (lead)

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Jia-Yi Du

Jia-Yi Du

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China.

School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China.

These authors contributed equally to this work.

Contribution: Methodology (lead), Software (lead), Writing - original draft (equal)

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Yue Yu

Yue Yu

Department of Chemistry and Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave. W., Waterloo, Ontario, N2 L 3G1 Canada.

These authors contributed equally to this work.

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Ying-Qi Fan

Ying-Qi Fan

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China.

School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China.

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Prof. Gang Huang

Prof. Gang Huang

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China.

School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China.

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Prof. Xin-Bo Zhang

Corresponding Author

Prof. Xin-Bo Zhang

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China.

School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China.

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Prof. Hong-Jie Zhang

Corresponding Author

Prof. Hong-Jie Zhang

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China.

School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026 China.

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First published: 18 July 2024
Citations: 1

Abstract

In the pursuit of next-generation ultrahigh-energy-density Li−O2 batteries, it is imperative to develop an electrolyte with stability against the strong oxidation environments. N,N-dimethylacetamide (DMA) is a recognized solvent known for its robust resistance to the highly reactive reduced oxygen species, yet its application in Li−O2 batteries has been constrained due to its poor compatibility with the Li metal anode. In this study, a rationally selected hydrofluoroether diluent, methyl nonafluorobutyl ether (M3), has been introduced into the DMA-based electrolyte to construct a localized high concentration electrolyte. The stable −CH3 and C−F bonds within the M3 structure could not only augment the fundamental properties of the electrolyte but also fortify its resilience against attacks from O2 and 1O2. Additionally, the strong electron-withdrawing groups (−F) presented in the M3 diluent could facilitate coordination with the electron-donating groups (−CH3) in the DMA solvent. This intermolecular interaction promotes more alignments of Li+-anions with a small amount of M3 addition, leading to the construction of an anion-derived inorganic-rich SEI that enhances the stability of the Li anode. As a result, the Li−O2 batteries with the DMA/M3 electrolyte exhibit superior cycling performance at both 30 °C (359th) and −10 °C (120th).

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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