The rapid growth of electronic waste must be curtailed to prevent accumulation of environmentally and biologically toxic materials, which are essential to traditional electronics 1 . The recent proliferation of transient electronics has focused predominantly on biocompatibility 2,3 , and studies reporting material recapture have only demonstrated reuse of conducting materials 4-6 . Meanwhile, the ideal solution to the electronic waste epidemic -recapture and reuse of all materials -has been largely neglected. Here we show complete recyclability of all materials in printed, all-carbon electronics using paper substrates, semiconducting carbon nanotubes, conducting graphene, and insulating crystalline nanocellulose. The addition of mobile ions to the dielectric produced significant improvements in