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Graphene‐based compact nanohybrid films made by alternate deposition of electrochemically exfoliated graphene and mesoporous graphene‐conducting polymer nanosheets are constructed for high‐energy micro‐supercapacitors. They are shown to have a landmark areal capacitance of 368 mF cm−2 and volumetric capacitance of 736 F cm−3.
Ultrathin printable graphene supercapacitors are demonstrated, based on solution‐processed electrochemically exfoliated graphene hybrid films on an ultrathin poly(ethylene terephthalate) substrate, exhibiting an unprecedented volumetric capacitance of 348 F cm−3, an ultrahigh scan rate of 2000 V s−1, and AC line‐filtering performance.
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