Abstract
As the next generation of energy storage component, supercapacitors has the characteristic of high capacitance with quick charge/discharge under high current. Although major manufacturers around the globe claim supercapacitor can operate for 10 years, none of them has provided complete empirical data as hard supporting evidence. In order to build a suitable life prediction model for supercapacitor, this research uses two major factors from designing phase; rated load voltage and ambient temperature; as the condition of environmental stress plan to perform accelerated life test in hoping to get product deterioration and eventual failure in set time. 30% of capacitance decay is set as the basis of test termination. Activation energy Ea and coefficient m is then calculated and used to complete the construction of stress model. In the end, through failure analysis, we not only get to understand how voltage and temperature affects the life of supercapacitor, but also can estimate its average life expectancy under normal and specific condition.