Tailored metal oxide thin film on polyethylene separators for sodium-ion batteries

Jin Il Kim, Jinwoo Heo, Jong Hyeok Park

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The development of polymer separators for Na+-ion batteries has not been of interest because conventional polyolefin (e.g., polyethylene or polypropylene) separators are not suitable for the solvation of Na+-ion-containing electrolytes. Here, we report a simple surface modification method based on chemical vapor deposition of SiO2 applied to a polyethylene separator for Na+-ion batteries. A thin SiO2 layer is coated uniformly onto a porous polymer separator with the negligibly increased total separator thickness. Improved wetting ability of the SiO2-film-coated polyethylene separators with a polar electrolyte based on ethylene carbonate (EC) and dimethyl carbonate (DMC) solvents is demonstrated, with superior electrochemical performance characteristics, such as initial specific capacity, C-rate and cyclic stability. In addition, the thin SiO2 coating film results in substantially suppressed thermal shrinkage, which may lead to improvements in the thermal and dimensional stability of Na+-ion batteries. Compared to a glass-fiber separator and the conventional PE separator, the metal-oxide-thin-film-coated polyethylene separator will accelerate the development of Na+-ion batteries for various electrochemical energy storage applications.

Original languageEnglish
Pages (from-to)A1965-A1969
JournalJournal of the Electrochemical Society
Volume164
Issue number9
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Polyethylene
separators
Separators
Oxide films
metal oxides
electric batteries
Polyethylenes
polyethylenes
Metals
Sodium
sodium
Ions
Thin films
thin films
ions
Electrolytes
Carbonates
carbonates
Polymers
electrolytes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

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abstract = "The development of polymer separators for Na+-ion batteries has not been of interest because conventional polyolefin (e.g., polyethylene or polypropylene) separators are not suitable for the solvation of Na+-ion-containing electrolytes. Here, we report a simple surface modification method based on chemical vapor deposition of SiO2 applied to a polyethylene separator for Na+-ion batteries. A thin SiO2 layer is coated uniformly onto a porous polymer separator with the negligibly increased total separator thickness. Improved wetting ability of the SiO2-film-coated polyethylene separators with a polar electrolyte based on ethylene carbonate (EC) and dimethyl carbonate (DMC) solvents is demonstrated, with superior electrochemical performance characteristics, such as initial specific capacity, C-rate and cyclic stability. In addition, the thin SiO2 coating film results in substantially suppressed thermal shrinkage, which may lead to improvements in the thermal and dimensional stability of Na+-ion batteries. Compared to a glass-fiber separator and the conventional PE separator, the metal-oxide-thin-film-coated polyethylene separator will accelerate the development of Na+-ion batteries for various electrochemical energy storage applications.",
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Tailored metal oxide thin film on polyethylene separators for sodium-ion batteries. / Kim, Jin Il; Heo, Jinwoo; Park, Jong Hyeok.

In: Journal of the Electrochemical Society, Vol. 164, No. 9, 01.01.2017, p. A1965-A1969.

Research output: Contribution to journalArticle

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