Projekt Energie

19.01.2021

Electrochemical Storage: Nickel based and Lithium-Ion Accumulators

Example battery storage power station, Schwerin, source: n-tv

Nickel based Accumulator

Basic reactions during charging and discharging

  • Electrolyte: potassium hydroxide
  • Discharging reaction at the metal hydride (MH) anode (0.83 V)
  • Discharging reaction at the metal hydride (MH) anode discharge reaction (0,83 V)
  • Discharge reaction at the cathode-NiOOH (+0.49 V)
  • Total open circuit voltage: 1.23 V

Technical specifications

  • System Size: Scalable
  • Power density: 200 - 700 W / kg
  • Energy density: 25 - 80 Wh / kg and 50-170 Wh / l
  • Life span : 10 years (2,000 cycles)
  • Self-discharge: ~ 15-20% / month
  • Investment: 400 - € 650 / kWh
  • Efficiency: 80 – 90%
  • Temperature range: - 40 - 50 ° C
  • Nominal voltage: ~ 1.2V

More information can be found on the learning platform.