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Waterborne spontaneous and robust coating of POSS nanoparticles on hydrophobic surfaces for application as an advanced separator in lithium ion batteries

Waterborne spontaneous and robust coating of the catechol-functionalized polyoctahedral silsesquioxane (CA-POSS) is studied on the surface of hydrophobic surfaces as a model organic-inorganic hybrid material was synthesized at room temperature, which readily produces an instant thin layer coating on...

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Published in:Journal of energy storage 2023-12, Vol.74, p.109344, Article 109344
Main Authors: Modigunta, Jeevan Kumar Reddy, Park, Keun No, Shin, Su Cheol, Murali, G., Udhayakumar, Hari Haran, Kim, Jeongmin, Yeon, Jemin, Park, Seongmin, Jang, Hyunju, Park, Young Ho, Noh, Ji-Young, Lim, Jung-Hyurk, Lee, Jihoon, Lee, Seung Jun, Kim, Kyung-Min, In, Insik
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Language:English
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Summary:Waterborne spontaneous and robust coating of the catechol-functionalized polyoctahedral silsesquioxane (CA-POSS) is studied on the surface of hydrophobic surfaces as a model organic-inorganic hybrid material was synthesized at room temperature, which readily produces an instant thin layer coating on the hydrophobic substrates such as mica film and polyethylene (PE) separator. The CA-POSS instantly forms nano-scale level coating with robust adhesion upon contact with the substrate surfaces in a basic aqueous medium at ambient conditions, unlike common coating methods that use prepared POSS particle dispersion. The surface roughness on the CA-POSS coated PE separator (PE-CAP) and mica was observed in AFM analysis. The PE-CAP separator showed highly enhanced hydrophilicity, electrolyte wettability, mechanical strength, and thermal stability. The PE-CAP separator is studied in lithium ion batteries (LIBs) using LiCoO2 cathode and Lithium metal anode has shown the highest specific capacity of ~171.3 mAh g−1 with capacity retention of ~99 % after 100 cycles in comparison to pristine PE separator (~159.4 mAh g−1, 92 %). [Display omitted] •Organic-inorganic hybrid solution type POSS (CA-POSS) is designed and synthesized.•CA-POSS solution rapidly forms POSS nanoparticles on any substrate in quick time.•The POSS particles formed on the PE separator (PE-CAP) showed a robust adhesion.•PE-CAP membranes are applied as separators in lithium ion batteries (LIBs).•PE-CAP separators excelled in cycling stability and capacity retention more than PE.
ISSN:2352-152X
2352-1538
DOI:10.1016/j.est.2023.109344