Flexible micro-supercapacitors (MSCs) are constructed by 3D graphene from chemical vapor deposition. Without using any binder or metal current collector, the as-prepared 3D graphene MSC exhibits good flexibility, excellent cyclic life, and high areal capacitance of 1.5 mF cm at a scan rate of 10 V s . The electrochemical performance is further improved by oxygen plasma functionalization.

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In situ plasma functionalization during manufacturing of CNT/polymer composites.