TPU scientists propose using polymer composite to fabricate
In a collaborative effort, TPU chemists and scientists from St. Petersburg have developed an electrically conductive metal-polymer composite on a polymer substrate for use
Among the many models of supercapacitors, the most widely used is the equivalent circuit model. The equivalent circuit model, according to the electrical characteristics of the supercapacitor in the working process, uses various components in the circuit to characterize its internal deterioration mechanism.
The model of a supercapacitor has important theoretical value for analyzing its electrode structure and energy storage mechanism. Developing a model that accurately represents the operational characteristics of supercapacitors is essential for analyzing their electrochemical behavior.
In the model, the heat generation is modeled as a current source, which is a function of the supercapacitor current; Cth represents the thermal capacity of the supercapacitor, Rth denotes the equivalent thermal resistance of the supercapacitor, and Ta denotes the surrounding air temperature. Figure 12. Supercapacitor thermal models.
The aging phenomenon of a supercapacitor in charge–discharge cycles is called cycle aging. The aging factors of a supercapacitor include external stress, self-acceleration, and manufacturer's production factors. The external stress includes voltage, temperature, charging and discharging power, etc.
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