High energy density anode materials : Li metal & SiO

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High energy density anode materials: Li metal & SiO

  • Extremely high theoretical specific capacity : Li metal (3860mAh/g), SiO (1400mAh/g)
  • Much low negative electrochemical potential : Li metal (-3.040V vs SHE), SiO (-2.64 vs SHE)
  • For large scale battery applications (EV & ESS system), new high energy density anode mateirals are essential

Lithium metal

Electrochemistry Communications
13 (2011) 1280-1283

J. Mater. Chem. A.
2015, 3, 7207-7209

Challenges & Approaches

    Li dendritic growth
  • Short circuit
  • Rapid electrolyte decomposition
  • Low efficiency
  • High surface resistance from thick SEI
    Enhancing SEI layer
  • Surface Coating
  • Electrolyte Addtivie

SiO

Nature communications 7 (2016)

Challenges & Approaches

    Low initial coulombic efficiency
  • Reversible capacity increase
  • Irreversible reaction control
  • Coating
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