The Effect of Temperature Changes on Supercapacitors
The operating temperature range of supercapacitors is -40°C to +70°C, while the operating temperature range of commercial supercapacitors can reach -40°C to +80°C.
Fig. 1 Example of Derating Temperature and Voltage to Extend Lifetime. Abracon does not recommend operating supercapacitors out of their specified ranges. For example, designing a 0-700C supercapacitor into a system that will experience 850C ambient temperature is not recommended, regardless of whether the temperature increase is temporary.
The life of supercapacitors will double for every 10°C decrease in temperature or voltage by 0.1V. Supercapacitors operated at room temperature can have life expectancies of several years compared to operating the capacitors at their maximum rated temperature. L1= Load life rating of the super capacitor (typically 1000 hours at rated temperature).
The operating temperature of a supercapacitor can vary depending on the manufacturer and model. However, most supercapacitors are designed to function within a temperature range of (−40 to 85)°C or (−40 to 185)°F. This temperature range is commonly referred to as the “standard” or “commercial” range.
A maximum specific capacitance of 33 F g −1 at a current density of 4 A g −1 was observed at 200 °C for supercapacitors based on free-standing TPU/clay/RTIL electrolyte. Meanwhile, the power density of the supercapacitor at 200 °C increased almost by two orders of magnitude compared to that at room temperature .
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