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Enhanced wettability and thermal stability of polypropylene separators by organic–inorganic coating layer for lithium‐ion batteries
Author(s) -
Chao ChunYing,
Feng YeFei,
Hua Kai,
Li Hao,
Wu LiJun,
Zhou YiSha,
Dong ZhenWei
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46478
Subject(s) - materials science , polypropylene , thermal stability , coating , chemical engineering , electrolyte , separator (oil production) , scanning electron microscope , wetting , ceramic , lithium (medication) , faraday efficiency , ionic conductivity , composite material , electrode , chemistry , medicine , physics , engineering , thermodynamics , endocrinology
Organic–inorganic coating polypropylene separators were developed by introducing SiO 2 nanoparticles through sol–gel process, where polydopamine was used as an intermediate layer. Scanning electron microscopy results showed the coating layers have highly porous structure, which was beneficial for liquid electrolyte uptake. Compared with pristine polypropylene separator, the ceramic separators showed improved thermal stability, higher ionic conductivity, and lower interfacial impedance. The cells employing the ceramic separators delivers excellent discharge capacity (retention = 75%) and coulombic efficiency up to 98% at 2 °C rate after 100 cycles. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46478.