SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 34 ›› Issue (6): 208-216.DOI: 10.1016/j.cjche.2020.10.024

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A design of Nafion-coated bilayered quasi-solid electrolyte for lithium-O2 batteries with high performance

Yingfei Hou, Lin Jiang, Yaoyao Zhang, Zhiwen Qin, Chi Jiang, Ming Wang   

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum(East China), Qingdao 266580, China
  • Received:2020-07-03 Revised:2020-09-21 Online:2021-08-30 Published:2021-06-28
  • Contact: Yingfei Hou
  • Supported by:
    This work was financially supported by Fundamental Research Funds for the Central Universities (18CX05001A), National Key R&D Program of China (2019YFE0115600), National Natural Science Foundation of China (21908247) and Shandong Province Major Science and Technology Innovation Project (2018CXGC1002).

A design of Nafion-coated bilayered quasi-solid electrolyte for lithium-O2 batteries with high performance

Yingfei Hou, Lin Jiang, Yaoyao Zhang, Zhiwen Qin, Chi Jiang, Ming Wang   

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum(East China), Qingdao 266580, China
  • 通讯作者: Yingfei Hou
  • 基金资助:
    This work was financially supported by Fundamental Research Funds for the Central Universities (18CX05001A), National Key R&D Program of China (2019YFE0115600), National Natural Science Foundation of China (21908247) and Shandong Province Major Science and Technology Innovation Project (2018CXGC1002).

Abstract: Lithium-air (also known as lithium-oxygen) batteries have attracted considerable global attention in recent years due to their extremely high energy density (11,140 W·h·kg-1). The electrolyte is a key element in lithium-air batteries and the traditional organic electrolyte has great safety risk due to leakage. On the contrary, the polymer electrolyte has the advantages of high safety, high stability and easy processing comparing with the organic liquid electrolytes. In this paper, a new idea was proposed to coat the Nafion membrane on a layer of polymer for blocking the oxidation reduction electric (RM) and Li based on the selective permeability on lithium ion of the Nafion membrane. Self-made thicknesscontrollable Nafion membrane, polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP) and 2,2,6,6-tetramethylpiperidinooxy (TEMPO) were used to prepare a quasi solid polymer electrolyte (NSPE). Electrochemical workstation and LAND battery testing system were used to perform a galvanostatic charge/discharge test on Li-O2. The ionic conductivity of NSPE was 4.3×10-4 S·cm-1 at room temperature and the discharge platform was 2.6 V and the charging voltage was 3.7 V after 50 cycles with the cut-off capacity of 500 mA·h·g-1.

Key words: Lithium-air battery, Polymer electrolyte, Redox mediator, P(VDF-HFP), Nafion

摘要: Lithium-air (also known as lithium-oxygen) batteries have attracted considerable global attention in recent years due to their extremely high energy density (11,140 W·h·kg-1). The electrolyte is a key element in lithium-air batteries and the traditional organic electrolyte has great safety risk due to leakage. On the contrary, the polymer electrolyte has the advantages of high safety, high stability and easy processing comparing with the organic liquid electrolytes. In this paper, a new idea was proposed to coat the Nafion membrane on a layer of polymer for blocking the oxidation reduction electric (RM) and Li based on the selective permeability on lithium ion of the Nafion membrane. Self-made thicknesscontrollable Nafion membrane, polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP) and 2,2,6,6-tetramethylpiperidinooxy (TEMPO) were used to prepare a quasi solid polymer electrolyte (NSPE). Electrochemical workstation and LAND battery testing system were used to perform a galvanostatic charge/discharge test on Li-O2. The ionic conductivity of NSPE was 4.3×10-4 S·cm-1 at room temperature and the discharge platform was 2.6 V and the charging voltage was 3.7 V after 50 cycles with the cut-off capacity of 500 mA·h·g-1.

关键词: Lithium-air battery, Polymer electrolyte, Redox mediator, P(VDF-HFP), Nafion