Complex sentence: As described above, electrical energy is stored in supercapacitors via two storage principles: static double-layer capacitance and electrochemical pseudocapacitance; and the distribution of the two types of capacitance depends on the material and structure of the electrodes.
Split into simpler sentences: As described above, supercapacitors store their electrical energy with two different storage principles: static double-layer capacitance and electrochemical pseudocapacitance. The distribution of the two types of capacitance depends on the material and structure of the electrodes.