Physicochemical and Electrochemical Properties of 1,1,2,2-Tetrafluoroethyl-2,2,3,3-Tetrafluoropropyl Ether as a Co-Solvent for High-Voltage Lithium-Ion Electrolytes

Xia, Lan; Lee, Saixi; Jiang, Yabei; Li, Shiqi; Liu, Zhaoping; Yu, Linpo; Hu, Di; Wang, Shuhan; Liu, Yitong; Chen, George Z.

Abstract

© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Although high-voltage positive electrode materials for high energy density lithium-ion batteries have gained a great attention, the lack of compatible electrolytes with sufficiently high oxidative stability to deliver an excellent cycling ability restricts their practical application. Fluorinated solvents are considered as promising candidates for high-voltage electrolyte solvents. In this study, we select 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) with a high boiling point, low cost, and good SEI-filming ability as a co-solvent of fluoroethylene carbonate-based electrolytes and extensively investigate its physicochemical and electrochemical properties for applications in high-voltage lithium-ion batteries. Our experimental results show that the TTE-containing electrolyte exhibits not only a high oxidative stability up to 5.5 V (vs. Li/Li+), but also excellent wettability with the separator. In addition to high discharge capacity and increased coulombic efficiency of the Li/LiNi0.5Mn1.5O4 half-cell assembled with the TTE-containing electrolyte cycled between 3.0 and 4.9 V, the cell also displays a high rate capability. This work shows that partially fluorinated ethers, e. g., TTE, are promising co-solvents for high-voltage electrolytes that can enable commercial development of high energy density lithium-ion batteries.

Citation

Xia, L., Lee, S., Jiang, Y., Li, S., Liu, Z., Yu, L., Hu, D., Wang, S., Liu, Y., & Chen, G. Z. (2019). Physicochemical and Electrochemical Properties of 1,1,2,2-Tetrafluoroethyl-2,2,3,3-Tetrafluoropropyl Ether as a Co-Solvent for High-Voltage Lithium-Ion Electrolytes. ChemElectroChem, 6(14), 3747-3755. https://doi.org/10.1002/celc.201900729

• Journal Article Type: Article
• Acceptance Date: Jun 25, 2019
• Online Publication Date: Jul 23, 2019
• Publication Date: Jul 15, 2019
• Deposit Date: May 20, 2020
• Publicly Available Date: Jul 16, 2020
• Journal: ChemElectroChem
• Electronic ISSN: 2196-0216
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 14
• Pages: 3747-3755
• DOI: https://doi.org/10.1002/celc.201900729
• Public URL: https://nottingham-repository.worktribe.com/output/3213107
• Publisher URL: https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/celc.201900729
• Additional Information: This is the peer reviewed version of the following article: Physicochemical and Electrochemical Properties of 1,1,2,2‐Tetrafluoroethyl‐2,2,3,3‐Tetrafluoropropyl Ether as a Co‐Solvent for High‐Voltage Lithium‐Ion Electrolytes, L. Xia, S. Lee, Y. Jiang, S. Li, Z. Liu, L. Yu, D. Hu, S. Wang, Y. Liu, G. Z. Chen, ChemElectroChem 2019 , 6 , 3747, which has been published in final form at https://doi.org/10.1002/celc.201900729. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.