In situ observation of dendrite growth of electrodeposited Li metal

Kei Nishikawa, Takeshi Mori, Tetsuo Nishida, Yasuhiro Fukunaka, Michel Rosso, Takayuki Homma

    Research output: Contribution to journalArticle

    77 Citations (Scopus)

    Abstract

    The dendrite growth behavior of Li metal galvanostatically electrodeposited on Ni substrate in a LiClO4 -propylene carbonate electrolyte solution was in situ observed by a laser scanning confocal microscope with a metallographic microscope. A Li dendrite precursor is stochastically evolved on Ni substrate probably through a solid electrolyte interphase layer produced by the surface chemical reaction between a reduced Li metal and an organic electrolyte. The measured length of randomly growing Li dendrite arms was statistically analyzed. The initiation period of the dendrite precursor becomes shorter with increasing current density and decreasing LiClO4 concentration. Once it has been initiated, the ionic mass transfer rate starts to govern the growth process of the dendrite arm length, exceeding over the surface chemistry controlling step. The dendrite arm length averaged over the substrate surface grows linearly proportional to the square root of time. The lower the concentration of LiClO4, the steeper the inclination of the line at 5 mA cm-2, whereas the concentration dependence of inclination is not evident at 0.5 mA cm-2.

    Original languageEnglish
    JournalJournal of the Electrochemical Society
    Volume157
    Issue number11
    DOIs
    Publication statusPublished - 2010

    Fingerprint

    Dendrites (metallography)
    dendrites
    Metals
    Electrolytes
    Microscopes
    Substrates
    metals
    Solid electrolytes
    Surface chemistry
    Propylene
    inclination
    Chemical reactions
    Carbonates
    Current density
    Mass transfer
    microscopes
    electrolytes
    Scanning
    Lasers
    solid electrolytes

    ASJC Scopus subject areas

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

    Cite this

    In situ observation of dendrite growth of electrodeposited Li metal. / Nishikawa, Kei; Mori, Takeshi; Nishida, Tetsuo; Fukunaka, Yasuhiro; Rosso, Michel; Homma, Takayuki.

    In: Journal of the Electrochemical Society, Vol. 157, No. 11, 2010.

    Research output: Contribution to journalArticle

    Nishikawa, Kei ; Mori, Takeshi ; Nishida, Tetsuo ; Fukunaka, Yasuhiro ; Rosso, Michel ; Homma, Takayuki. / In situ observation of dendrite growth of electrodeposited Li metal. In: Journal of the Electrochemical Society. 2010 ; Vol. 157, No. 11.
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    AU - Mori, Takeshi

    AU - Nishida, Tetsuo

    AU - Fukunaka, Yasuhiro

    AU - Rosso, Michel

    AU - Homma, Takayuki

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