1. Basic properties and characteristics of Li-ion batteries

1.5. Li-ion cell

  • Cathode - metal oxide (LiMO2, M… Co, Mn, Fe, Ni), collector Al
  • LiMO2 - LiCoO2, LiMnO2, LiNiO2
  • Anode - graphite, Cu collector
  • Separator - thin porous foils (polyethylene, polypropylene)
  • Electrolyte - lithium salt and organic solvent
    Discharging
    • Li + ions travel through the separator from the anode to the cathode.
    • Electrons through an electrical circuit.
    • The ions penetrate the LiMO2 metal oxide lattice.
    • Discharged cell = steady state

    • Li+ ions travel through the separator from the cathode to the anode.
    • Layered graphite structures allow Li+ intercalation.
    • Graphite does not play a role in the chemical reaction, it is only the "storage medium" for Li+.
    • Charged cell = unstable state


      Li-ion cell





    Chaofeng Liu1, Zachary G. Neale2 and Guozhong Cao: Understanding electrochemical potentials of cathode materials in rechargeable batteries, Materials Today, Volume 19, Number 2, Elsevier 2016