摘要详情
91 / 2023-09-27 16:25:38
Molecular design of nonflammable diethyl fluorophosphate for rechargeable lithium-ion batteries
Nonflammable, electrolyte, Fluorophosphate, Lithium-ion batteries
摘要录用
Molecular design of nonflammable diethyl fluorophosphate for rechargeable lithium-ion batteries
Yintong Zhao1, Zhiwei Miao1, *
1State Key Laboratory and Institute of Elemento-Organic Chemistry, University of Nankai, Weijin Road 94, Tianjin, 300071
*E-mail: miaozhiwei@nankai.edu.cn
The success of lithium-ion batteries (LiBs) has supported the current technological development in 5G communication, electric vehicles, and intelligent robots.[1] However, flammable carbonate-based electrolytes pose serious safety risks for the practicability of LiBs.[2] In this work, a new phosphate, diethyl fluorophosphate (PF, Fig. 1a), was proposed to handle the safety concern while maintaining the high cycling stability of batteries.[3] The strong electron-withdrawing fluorine can not only increase the solvating power of phosphate, improving the ion conductivity of electrolyte, but also lower the HOMO level of phosphate, enabling elevated oxidation stability. The optimized electrolyte, 2M lithium hexafluorophosphate (LiPF6)/ethylene carbonate (EC):PF=1:1 (vol), shows better fire-extinguishing (Fig. 1b and 1c) and comparable compatibility with graphite anode than that of commercial carbonate-based electrolyte (Fig. 1d).
Fig. 1 a) Molecular structure of PF. (b, c) Flame retardant testing of PF-based electrolyte (b) and commercial electrolyte (c), respectively. (d) Cycle stability and Coulomb efficiency of Li|| graphite half cells using commercial electrolyte and PF-based electrolytes.
Keywords: Nonflammable, electrolyte, Fluorophosphate, Lithium-ion batteries
References
[1] Y. Wang, Z. Li, Y. Hou, Z. Hao, Q. Zhang, Y. Ni, Y. Lu, Z. Yan, K. Zhang, Q. Zhao, F. Li and J. Chen, Chemical Society Reviews 2023.
[2] J. Wang, Y. Yamada, K. Sodeyama, E. Watanabe, K. Takada, Y. Tateyama and A. Yamada, Nature Energy 2017, 3, 22-29.
[3] M. B. Herath, S. E. Creager, A. Kitaygorodskiy and D. D. DesMarteau, ChemPhysChem 2010, 11, 2871-2878.
Yintong Zhao1, Zhiwei Miao1, *
1State Key Laboratory and Institute of Elemento-Organic Chemistry, University of Nankai, Weijin Road 94, Tianjin, 300071
*E-mail: miaozhiwei@nankai.edu.cn
The success of lithium-ion batteries (LiBs) has supported the current technological development in 5G communication, electric vehicles, and intelligent robots.[1] However, flammable carbonate-based electrolytes pose serious safety risks for the practicability of LiBs.[2] In this work, a new phosphate, diethyl fluorophosphate (PF, Fig. 1a), was proposed to handle the safety concern while maintaining the high cycling stability of batteries.[3] The strong electron-withdrawing fluorine can not only increase the solvating power of phosphate, improving the ion conductivity of electrolyte, but also lower the HOMO level of phosphate, enabling elevated oxidation stability. The optimized electrolyte, 2M lithium hexafluorophosphate (LiPF6)/ethylene carbonate (EC):PF=1:1 (vol), shows better fire-extinguishing (Fig. 1b and 1c) and comparable compatibility with graphite anode than that of commercial carbonate-based electrolyte (Fig. 1d).
Fig. 1 a) Molecular structure of PF. (b, c) Flame retardant testing of PF-based electrolyte (b) and commercial electrolyte (c), respectively. (d) Cycle stability and Coulomb efficiency of Li|| graphite half cells using commercial electrolyte and PF-based electrolytes.
Keywords: Nonflammable, electrolyte, Fluorophosphate, Lithium-ion batteries
References
[1] Y. Wang, Z. Li, Y. Hou, Z. Hao, Q. Zhang, Y. Ni, Y. Lu, Z. Yan, K. Zhang, Q. Zhao, F. Li and J. Chen, Chemical Society Reviews 2023.
[2] J. Wang, Y. Yamada, K. Sodeyama, E. Watanabe, K. Takada, Y. Tateyama and A. Yamada, Nature Energy 2017, 3, 22-29.
[3] M. B. Herath, S. E. Creager, A. Kitaygorodskiy and D. D. DesMarteau, ChemPhysChem 2010, 11, 2871-2878.
重要日期
-
会议日期
11月12日
2023
至11月16日
2023
-
10月24日 2023
初稿截稿日期
-
11月16日 2023
注册截止日期
主办单位
Ningbo University
