Method for manufacturing a miniaturized electrochemical cell and a miniaturized electrochemical cell

A miniaturized electrochemical cell comprising a substrate made of an electrically conducting material, on a surface of which is placed at least one, and up to 9 repeating units, each repeating units consisting of the following stack of layers:

• a lower layer made of a macroporous electroconducting or semi-conducting material M1, forming a first electrode,
• an intermediate layer of colloidal particles having their largest dimension comprised between 20 to 2,000 nm, preferably comprised between 100 and 1,200 nm, made of an electrically insulating material, and
• an upper layer made of a macroporous electron conducting or semi-conducting material M2 forming a second electrode,
• the lower layer forming the first electrode of the first repeating unit being in contact with said surface of the substrate, and the upper layer forming the second electrode of each repeating unit being the lower layer forming the first electrode of the following repeating unit, if present.

A miniaturized electrochemical cell comprising a substrate made of an electrochemically conducting material, on a surface of which is placed at least one and up to 9 repeating units, each repeating unit consisting of the following stack of layers:

• a lower layer made of a macroporous electroconducting or semi-conducting material M1, forming a first electrode,
• an intermediate layer made of a macroporous conducting or semi-conducting material M3,
• an upper layer made of a macroporous electron conducting or semi-conducting material M2 forming a second electrode,
• the lower layer forming the first electrode of the first repeating unit being in contact with said surface of the substrate, and the upper layer of each repeating unit forming the second electrode, the following repeating unit, if present, and
• the material M2 having a potential higher than the potential of the material M3.