A novel flame retardant and film-forming electrolyte additive for lithium ion batteries |
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| Authors: | Shiyu Chen Zhaoxiang Wang Hailei Zhao Hongwei Qiao Helin Luan Liquan Chen |
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| Affiliation: | 1. Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;2. School of Materials Science and Engineering, Beijing University of Science and Technology, Beijing 100083, China;3. Beijing General Research Institute of Mining and Metallurgy, Beijing 100044, China |
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| Abstract: | Allyl tris(2,2,2-trifluoroethyl) carbonate (ATFEC) was synthesized as a bi-functional additive of flame retardant and film former in electrolytes for lithium ion batteries (LIBs). The flame retardancy of the additive was characterized with differential scanning calorimetry (DSC) and self-extinguishing time (SET). It is shown that adding 1 vol.% ATFEC in 1 M LiPF6/propylene carbonate (PC) can effectively enhance the thermal stability of the electrolyte and suppress the co-intercalation of PC into the graphitic anode. Further evaluation indicates that the additive hardly affect the conductivity of electrolyte. These support the feasibility of using ATFEC as an additive on formulating an electrolyte with multiple functions such as film-forming enhancement, high thermal stability and high ionic conductivity. |
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| Keywords: | Allyl tris(2,2,2-trifluoroethyl) carbonate (ATFEC) Flame retardant Film-forming Electrolyte additive Lithium ion battery |
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