Electrochemical properties of Li metal batteries with P(PEGMA)-coated lithium trivanadate cathode and Li powder anode

Sung Ho Cho, Sun Woo Hwang, Byung Hyuk Kim, Ki Yoon Bae, Hyun Yoon, Sam S. Yoon, Woo Young Yoon

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    Ionic conductive poly(poly(ethylene glycol) methyl ether methacrylate) (hereafter polymer) was coated onto a lithium trivanadate (LiV3O8) cathode by using an electrostatic spray deposition method in an effort to improve the ionic conductivity and prevent dissolution of vanadium into the electrolyte. The coating layer on the LiV3O8 electrode was identified by Fourier transform infrared spectroscopy, field emission scanning electron microscopy and transmission electron microscopy. Polymer was uniformly coated on the LiV3O8 electrode with a thickness of about 40 nm. Lithium powder, synthesized by the droplet emulsion technique, was used as the anode. Electrochemical charge-discharge tests showed that the cell based on the polymer-coated LiV3O8 cell exhibited an initial specific capacity of 186 mAh/g and the capacity retentions of the polymer-coated LiV3O8 after 100cycles was 87%, which is far improved that of uncoated cell (65%). Also, the coated cell showed 81% of the capacity retention after 300 cycles at 2 C-rate. These results demonstrate that the polymer coating on LiV3O8 is effective for suppressing capacity fading at high C-rate.

    Original languageEnglish
    Pages (from-to)10607-10612
    Number of pages6
    JournalJournal of Nanoscience and Nanotechnology
    Volume16
    Issue number10
    DOIs
    Publication statusPublished - 2016 Oct

    Bibliographical note

    Funding Information:
    This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIP) (2011-0028757) and Ministry of Knowledge Economy (MKE, Korea) (10045221). The microstructure of the samples was observed by TEM, with equipment located at the Korea Basic Science Institute Seoul Center.

    Keywords

    • Electrostatic spray deposition
    • Lithium
    • Lithium powder
    • Poly(poly(ethylene glycol)methyl ether methacrylate)

    ASJC Scopus subject areas

    • Bioengineering
    • General Chemistry
    • Biomedical Engineering
    • General Materials Science
    • Condensed Matter Physics

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