| 초록 |
We demonstrate monolithic heteronanomat (MH) paper air cathodes to enable the fabrication of origami-foldable zinc (Zn)–air batteries. The MH paper air cathodes consist of one-dimensional (1D) bifunctional catalyst mixtures (Double perovskite nanofibers for the oxygen evolution reaction and nitrogen-doped carbon nanotubes for the oxygen reduction reaction), cellulose nanofibers (CNFs), and polytetrafluoroethylene (PTFE) nanoparticles, without the incorporation of conventional current collectors and gas diffusion layers. The CNFs and PTFE nanoparticles act as hydrophilic and hydrophobic binders, respectively, to construct three-dimensional bicontinuous electrolyte/air channels in the MH paper air cathodes. The well-developed electrolyte/air transport pathways, in combination with the rational design of the 1D bifunctional catalyst mixtures, enables the resultant Zn–air batteries to exhibit highly efficient charge/discharge performance and exceptional mechanical foldability. |
