Electric double layer capacitor, electrolytic solution therefore and method for suppressing self-discharge in electronic component

摘要

Electric double layer capacitors having improved stability of electrochemical properties and improved retention of residual voltage, imparted by using an electrolytic solution containing a polymer, such as acrylonitrile/stryrene copolymer, giving an increased electrolyte ion difusion resistance are provided. The capacitors are useful for electro-storage devices, such as back-up power source for real time clocks. The polymer is useful for suppressing self discharge in electronic components, such as electric double layer capacitor, aluminum electrolytic capacitors, electro-chemical capacitor and secondary batteries.