Seal between two elements having different coefficients of thermal expansion

A system comprising:

• at least one electrochemical cell comprising an electrolyte arranged between an anode and a cathode, the at least one electrochemical cell further comprising an anodic interconnector and a cathodic interconnector connected to the anode and the cathode;
• a first seal that contacts and is inserted between the electrolyte and the anodic interconnector;
• and
• a second seal that contacts and is inserted between the electrolyte and the cathodic interconnector,
• wherein the first seal and the second seal each comprise:
• a first metallic contact portion and a second metallic contact portion each of which is spaced along an axial stacking direction;
• tight connection means connecting the first metallic contact portion to the second metallic contact portion, the tight connection means allowing a relative movement between the first metallic contact portion and the second metallic contact portion along a radial direction of the seal;
• and
• a first sliding part and a second sliding part arranged along the axial stacking direction between the first metallic contact portion and the second metallic contact portion, wherein the first sliding part and the second sliding part are respectively coupled in translation along the radial direction with the first metallic contact portion and the second metallic contact portion, and wherein the first sliding part and the second sliding part are configured to slide in relation to each other along the radial direction,
• wherein the electrolyte has a different coefficient of thermal expansion than the anodic interconnector and the cathodic interconnector,
• wherein, with respect to the first seal, a corresponding first sliding part has a coefficient of thermal expansion that is similar or identical to a coefficient of thermal expansion of the anodic interconnector, and a corresponding second sliding part has a coefficient of thermal expansion that is similar or identical to a coefficient of thermal expansion of the electrolyte,
• wherein, with respect to the second seal, a corresponding other first sliding part has a coefficient of thermal expansion that is similar or identical to a coefficient of thermal expansion of the cathodic interconnector, and a corresponding other second sliding part has a coefficient of thermal expansion that is similar or identical to the coefficient of thermal expansion of the electrolyte.