Electrochemical system comprising at least one partial making up zone

An electrochromic device, comprising at least one carrier substrate (S1) provided with a functional multilayer defining a deposition zone and comprising, in succession:

• a first electroconductive layer (1) which is the one closest to the substrate;
• a first electrochemically active layer (2) capable of reversibly inserting H+ and Li+ cations, or OH− anions, made of an anodic, or respectively cathodic, electrochromic material;
• an electrolyte layer (3);
• a second electrochemically active layer (4) capable of reversibly inserting said ions, made of a cathodic, or respectively anodic, electrochromic material;
• and
• a second electroconductive layer (5), characterized in that the functional multilayer is deactivated, with the exception of the first electrochemically active layer (2), in at least a first, partial margination zone (A) located along at least one edge of said deposition zone, wherein the functional multilayer is deactivated over at least part of its periphery, in at least a second, total margination zone (B) located along at least one edge of said deposition zone.

A method of reducing/eliminating peripheral short circuits in a functional multilayer in a electrochemical device when in operation to improve the memory effect of said multilayer, the functional multilayer comprising at least, in succession:

• a first electroconductive layer (1), a first electrochemically active layer (2) capable of reversibly inserting H+ and Li+ cations, or OH− anions, made of an anodic, or respectively cathodic, electrochromic material, an electrolyte layer (3), a second electrochemically active layer (4) capable of reversibly inserting said ions-made of a cathodic, or respectively anodic, electrochromic material, and a second electroconductive layer (5), and
• the method comprising
• locally inhibiting the functionality of at least one of the functional layers in a first, partial margination zone (A), with the exception of one of the electroconductive layers and of one of the electrochemically active layers, with the exception of the first electroconductive layer (1) which is the one closest to the carrier substrate, and of the first electrochemically active layer (2) which is the one associated with said first electroconductive layer;
• and
• locally inhibiting the functionality of all the functional layers in a second, total margination zone (B) close to the first, partial margination zone (A), over the entire thickness of the multilayer, said second, total margination zone (B) exposing at least one surface portion of said carrier substrate to reduce/eliminate peripheral short circuits in the functional multilayer.