▎ 摘　　要

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.