Electrochemical Storage: Nickel based and Lithium-Ion Accumulators
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
Lead- acid -Accumulator (0,78 MB)