Dear Veeresh Shantappa
The adoption of supercapacitors for long-term energy storage is usually confined by the parameters that determine their performance, that include self-discharge behavior and leakage current.
When the supercapacitor's charging source is unplugged, the supercapacitor begins to lose charge owing to its high internal resistance. This is known as the Self-discharge property. It is a voltage fluctuation in a charged capacitor following a time apparently of no load. Furthermore, the temperature affects the self-discharge properties of a supercapacitor. A porous polyvinylidene fluoride (PVDF) membrane with a piezoelectric effect can be utilized as supercapacitor separators, possibly lowering self-discharge by up to 30%. This is attributed to electrolyte ion transport being hampered over the polarized PVDF separators.
Leakage current is a charge current determined from the pin-to-pin voltage throughout a charge resistor after the super-capacitor has been charged for several hours although the super-capacitor is on charge. This leakage current is equal to the charging current essential to keep the supercapacitor at the stated voltage. The leakage current decreases with time, subsequently stabilising. To rectify this fundamental issue, we may add two high-value resistors across each individual capacitor, which can potentially reduces the leakage current.
- Badges
- Science topic
- Similar topics
- Mathematical Sciences
- Graphs