One of the problems of potassium cryolite electrolyte is the low conductivity, resulting in a large ohmic drop. Although it can be compensated by adding LIF and other additives and reducing the polar distance, the additives not only improve the conductivity, but also reduce the solubility of alumina and increase the primary crystallization temperature. At the same time, the reduction of polar distance also depends on the industrial application of wettable cathode.

In addition, in the process of low-temperature electrolysis, K + is enriched in the cathode, and the electrolyte molecular ratio near the cathode increases, resulting in cathode crusting. The common phenomenon in the electrolysis process with potassium cryolite as electrolyte is that the cell voltage is high and fluctuates greatly, and the current efficiency is low. Potassium cryolite molten salt also has serious corrosion on inert anode and side lining materials, so it is necessary to further find suitable inert anode and side lining materials.

Although the research of potassium cryolite electrolyte has been paid attention to to to a certain extent, it is far from enough compared with the research of sodium cryolite.