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Tris(2,4,6‐trimethylphenyl) phosphine with Aluminum Oxide Incorporated Polyethylene Separator for Lithium‐Ion Batteries
Author(s) -
Oh Seong Ho,
Lee Giseung,
Yim Taeeun
Publication year - 2021
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.12357
Subject(s) - separator (oil production) , polyethylene , x ray photoelectron spectroscopy , materials science , scanning electron microscope , tris , electrolyte , phosphine , chemical engineering , analytical chemistry (journal) , chemistry , nuclear chemistry , composite material , organic chemistry , electrode , biochemistry , physics , engineering , thermodynamics , catalysis
Radical‐scavenging Al 2 O 3 ‐tris(2,4,6‐trimethylphenyl) phosphine (TMPP)‐functionalized polyethylene (PE) separator is modified by preparation of the Al 2 O 3 ‐TMPP composites and embedding them onto the PE separator by dip‐coating process. Scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, X‐ray diffraction, and Fourier‐transform infrared spectroscopy analyses indicate that Al 2 O 3 ‐TMPP is well coated onto the PE separator. The Al 2 O 3 ‐TMPP‐embedded PE separator exhibits a lower contact angle and higher electrolyte uptake than the bare PE separator, indicating a more hydrophilic surface is developed in the Al 2 O 3 ‐TMPP‐embedded PE separator. The cell cycled with the Al 2 O 3 ‐TMPP‐embedded PE separator exhibits stable cycling behavior after 150 cycles at high temperature (59.8%) while the cell cycled with a bare PE separator shows a continuous decrease in cycling retention (47.1%). The use of the Al 2 O 3 ‐TMPP‐embedded PE separator is therefore an effective way to improve the cell cycling retention because it can effectively lower the radical concentration via a chemical scavenging process.