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서브비주얼

Advanced Battery Materials Lab.

Prof. Cheol-Min Park and colleagues at ABML (Advanced Battery Materials Lab. in KIT) in Korea are attempting to meet the ever increasing demands for better batteries.

Research Area

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  • Research Area

Magnesium (Mg) rechargeable battery

  • Mg rechargeable battery

    Rechargeable Mg battery has been long considered as a highly promising technology for energy storage and conversion. Mg possesses several characteristics that rank it as one of the most auspicious metal anodes for high energy-density batteries. The fast insertion kinetics for bivalent Mg2+ ions was attributed to the unusual structure that provides a large number of vacant sites, short distances between them, and the metallic Mo6 cluster that easily compensates the charge-unbalance due to the introduction of bivalent ions. Hence the DCC electrolyte solutions enable both 100% reversible Mg deposition and insertion into these chevrel phases with no side reactions.

    Mg rechargeable battery 이미지
  • Characteristics
    Abundant element in the earth’s crust
    • Mg as a raw material is low cost and abundant
    High energy density compared to Li-ion battery & two-electron charge
    • 2205 mAh g-1 and 3833 mAh cm-3
    Mg compounds are environmental stable “green”
    • Safer, no dendrite formation / non-toxic and stable
    • Mg alloys can be readily stabilized and safe to handle
    • Room temperature
  • Electrode materials for Mg rechargeable battery
    Characterization of representative cathodes
    Characterization of representative cathodes
    Cathode materials Mg-insertion/
    formula unit
    Specific capacity
    (mAh g-1)
    Potential (V)
    Mo3S4 1 122 1-1.5 a
    MoS6Se2 2 102 0.5-2 a
    MoS2 0.66 170 1.5-2.5 a
    [Hol/AB] MnO2 0.09-0.39 85-209 1.85-4.75b
    TiS2 nanotubes 0.49 236 0.5-2.0 a
    V2O5 2 589 2-4.2 b
    Mg1.03Mn0.97SiO4 0.81 253 1.5-2.1 a
    MgCoSiO4 1 250 (at 700 ℃) 1.2-2.0 a
    a Potential measured vs. Mg/Mg2+.      bPotential measured vs. Li/Li+.