Method for making stretchable capacitor electrode-conductor structure

A method of making a stretchable capacitor electrode-conductor structure comprising:

• step (S1), providing an elastic substrate, and pre-stretching the elastic substrate along a first direction and a second direction to obtain a pre-stretched elastic substrate;
• step (S2), laying a carbon nanotube active material composite layer on a surface of the pre-stretched elastic substrate, the step (S2) comprising:
• step (S21), laying a first carbon nanotube film structure on the surface of the pre-stretched elastic substrate, and the first carbon nanotube film structure directly contacting with the pre-stretched elastic substrate and comprising a plurality of first super-aligned carbon nanotube films stacked with each other, each of the plurality of first super-aligned carbon nanotube films comprising a plurality of first carbon nanotubes substantially parallel with each other;
• step (S22), covering a first mask on a surface of the first carbon nanotube film structure away from the pre-stretched elastic substrate;
• step (S23), adding an electrode active material through the first mask to the surface of the first carbon nanotube film structure away from the pre-stretched elastic substrate, to form a first active material layer on a part of the surface of the first carbon nanotube film structure;
• step (S24), removing the first mask;
• and
• step (S25), laying a second carbon nanotube film structure on a surface of the first active material layer away from the pre-elastic substrate, and the second carbon nanotube film structure directly contacting with the first active material layer and comprising a plurality of second super-aligned carbon nanotube films stacked with each other, each of the plurality of second super-aligned carbon nanotube films comprising a plurality of second carbon nanotubes substantially parallel with each other;
• step (S3), releasing the pre-stretching of the elastic substrate to restore deformations of the elastic substrate, and forming a plurality of wrinkles on a surface of the carbon nanotube active material composite layer;
• and
• step (S4), processing the carbon nanotube active material composite layer to obtain a capacitor electrode and a conductor structure, and the capacitor electrode and the conductor structure being formed by an integrated molding.