Half cell and method for manufacturing a half cell

A half cell for an electrochemical sensor, the half cell comprising:

• a housing defining a chamber, wherein the chamber contains an electrolyte;
• a lead that is electrically conductive and is in contact with the electrolyte;
• and
• a closure element connecting the lead to the housing in a sealed manner, wherein the lead includes a coating comprising molecules that include a first functional group selected to enable the molecules of the coating to interact chemically with the lead and that include a second functional group, which is different from the first functional group, selected to enable the molecules to interact chemically with the closure element,
• wherein a first portion of the molecules with the first functional group are in an intermolecular connection with the lead, and wherein the first portion of the molecules and/or a second portion of the molecules with the second functional group are in an intermolecular connection with the closure element.