The forms of aqueous solution electrolyzers can be divided into diaphragm electrolyzers and diaphragm-free electrolyzers. Diaphragm electrolyzers can be divided into isotropic membranes (asbestos wool), ionic membranes and solid electrolyte membranes (such as β-Al2O3). Diaphragm-free electrolyzers are divided into mercury electrolyzers and oxidation electrolyzers.
When different electrolytes are used, the structure of the electrolyzer is also different.