Electron beam induced strong organic/inorganic grafting for thermally stable lithium-ion battery separators

Yunah Choi, Jin Il Kim, Jungjin Moon, Jongyeob Jeong, Jong Hyeok Park

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A tailored interface between organic and inorganic materials is of great importance to maximize the synergistic effects from hybridization. Polyethylene separators over-coated with inorganic thin films are the state-of-the art technology for preparing various secondary batteries with high safety. Unfortunately, the organic/inorganic hybrid separators have the drawback of a non-ideal interface, thus causing poor thermal/dimensional stability. Here, we report a straightforward method to resolve the drawback of the non-ideal interface between vapor deposited SiO 2 and polyethylene separators, to produce a highly stable lithium-ion battery separator through strong chemical linking generated by direct electron beam irradiation. The simple treatment with an electron beam with an optimized dose generates thermally stable polymer separators, which may enhance battery safety under high-temperature conditions. Additionally, the newly formed Si–O–C or Si–CH 3 chemical bonding enhances electrolyte-separator compatibility and thus may provide a better environment for ionic transport between the cathode and anode, thereby leading to better charge/discharge behaviors.

Original languageEnglish
Pages (from-to)339-344
Number of pages6
JournalApplied Surface Science
Volume444
DOIs
Publication statusPublished - 2018 Jun 30

Bibliographical note

Funding Information:
This work was supported by the NRF of Korea Grant funded by the Ministry of Science, ICT & Future Planning ( NRF-2015M2A2A6A01045277 , 2014M3A7B4052200 , 2014M3A7B4051747 ).

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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