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Zitat von Batteryuniversity.comFigure 3: Observing saturation times of new and aged Li-ion in Stage 2 before switching to ready.
The new cell stays in full-charge longer than the old cell and has a shorter current trail.
Courtesy: Cadex Electronics Inc.
A common aging effect of Li-ion is loss of charge transfer capability. This is caused by the formation of passive materials on the electrodes, which inhibits the flow of free electrons. This reduces the porosity on the electrodes, decreases the surface area, lowers the lower ionic conductivity and raises migration resistance. The aging phenomenon is permanent and cannot be reversed.
The health of a battery is based on these three fundamental attributes:
- Capacity, the ability to store energy. Capacity is the leading health indicator of a battery
- Internal resistance, the ability to deliver current
- Self-discharge, indicator of the mechanical integrity