Flexible electrode and preparation method thereof

A method for preparing a flexible electrode, comprising:

• providing a carrier plate, and sequentially forming a flexible base layer and an intermediate conductive layer on a side of the carrier plate;
• preparing an elastomeric template with an electrode pattern, and treating the elastomeric template with an acid, followed by transferring and printing the electrode pattern of the elastomeric template onto a surface of the intermediate conductive layer by microcontact printing such that an electrode inducing layer complementary to the electrode pattern is formed on the intermediate conductive layer;
• adding a mixture of nano titanium dioxide and a solution of polydopamine precursor onto the intermediate conductive layer that is not covered by the electrode inducing layer, using a glass with a transparent conductive layer as a cathode, and the intermediate conductive layer as an anode, disposing the transparent conductive layer and the intermediate conductive layer opposite to each other, forming a titanium dioxide-polydopamine composite layer in a gap of the electrode inducing layer by electroplating and oxidizing the anode under ultraviolet light;
• adding a solution of platinum ion onto surfaces of the titanium dioxide-polydopamine composite layer and the electrode inducing layer, using a glass with a transparent conductive layer as an anode, and the intermediate conductive layer as a cathode, disposing the transparent conductive layer facing to the intermediate conductive layer, forming a platinum electrode layer on the titanium dioxide-polydopamine composite layer by reducing the cathode under ultraviolet light;
• removing the carrier plate to obtain the flexible electrode.