Current collector, electrode plate including the same and electrochemical device

An electrode plate, comprising:

• a current collector and an electrode active material layer formed on a surface of the current collector,
• wherein current collector comprises:
• an insulation layer and at least one conductive layer, wherein the insulation layer is used to support the conductive layer, and the at least one conductive layer is used to support the electrode active material layer and is located above at least one surface of the insulation layer,
• wherein the insulation layer has a density smaller than a density of the conductive layer, and
• wherein a metal protective layer is arranged on at least one surface of each of the at least one conductive layer.

An electrochemical device, comprising:

• a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate and/or the negative electrode plate is an electrode plate,
• wherein the electrode plate comprises:
• a current collector and an electrode active material layer formed on a surface of the current collector,
• wherein current collector comprises:
• an insulation layer and at least one conductive layer, wherein the insulation layer is used to support the conductive layer, and the at least one conductive layer is used to support the electrode active material layer and is located above at least one surface of the insulation layer,
• wherein the insulation layer has a density smaller than a density of the conductive layer, and
• wherein a metal protective layer is arranged on at least one surface of each of the at least one conductive layer.