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Surface‐modified polyethylene separator with hydrophilic property for enhancing the electrochemical performance of lithium‐ion battery
Author(s) -
Ahn Yongkeon,
Kwon Yong Kab,
Kim Ki Jae
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5401
Subject(s) - separator (oil production) , microporous material , electrochemistry , ammonium persulfate , materials science , electrolyte , chemical engineering , ion , polyethylene , ionic conductivity , conductivity , chemistry , composite material , organic chemistry , electrode , polymer , physics , engineering , polymerization , thermodynamics
Summary The suggested surface treatment using ammonium persulfate (APS) successfully introduces hydrophilic functional groups onto the microporous structure of the polyethylene (PE) separators, leading to a high affinity toward polar liquid electrolytes without degrading the intrinsic physical properties of the separator. This improves the lithium‐ion migration and ionic conductivity of the APS‐treated separator, affording a stable cycle performance (92.5% at 90th cycle) and significantly improved rate capability (87.5% at 3 C).