Stretchable composite electrode and stretchable lithium ion battery using the same

A stretchable lithium ion battery comprising:

• a stretchable positive electrode and a stretchable negative electrode, each of the stretchable positive electrode and the stretchable negative electrode comprising a carbon nanotube active material composite layer with a surface comprising a plurality of wrinkles, and the carbon nanotube active material composite layer comprising:
• a plurality of carbon nanotube film structures, each of the plurality of carbon nanotube film structures comprising a plurality of super-aligned carbon nanotube films stacked with each other, and each of the plurality of super-aligned carbon nanotube films comprising a plurality of carbon nanotubes substantially parallel with each other;
• and
• a plurality of active material layers alternated and stacked with the plurality of carbon nanotube film structures, and each of the plurality of active material layers located between adjacent carbon nanotube film structures;
• an electrolyte located between the stretchable positive electrode and the stretchable negative electrode;
• a package structure being configured to encapsulate the stretchable positive electrode, the stretchable negative electrode, and the electrolyte,
• a positive electrode tab comprising a first end and a second end, the first end connected to the stretchable positive electrode, and the second end extending out of the package structure;
• and
• a negative electrode tab comprising a third end and a fourth end, the third end connected to the stretchable negative electrode, and the fourth end extending out of the package structure.