Using electrolyte as cathode has many advantages. First, the contact area between liquid and medium is large, which helps to improve capacitance. Secondly, the electrolytic capacitor made of electrolyte can withstand the highest temperature of 260 degrees, so that it can pass wave soldering (wave soldering is an important process of SMT chip installation) and has strong pressure resistance.

In addition, the electrolytic capacitor with electrolyte as cathode can heal itself as long as the breakdown current does not last after dielectric breakdown. But electrolyte also has its disadvantages. First of all, it is easy to volatilize and leak in high temperature environment, which has a great influence on life and stability. At high temperature and high pressure, the electrolyte may vaporize instantly, and the volume will increase, causing an explosion (that is, we often say Explosicum); Secondly, the ionic conductivity method used in the electrolyte is very low, only 0.0 1S (conductivity, reciprocal of ohm) /CM, which leads to the extremely high ESR value (equivalent series resistance) of the capacitor.