Single-cell-array biomass-templated architecture of hierarchical porous electrocatalysts for Zn–air and Zn–H2O2 batteries

Abstract

Hierarchically macro–meso–microporous ZIF-67/nori-derived electrocatalysts were synthesized by using single-cell-array nori and ZIF-67 as macroporous and microporous templates, and KOH as a meso/micropore-forming reagent. The ZIF-67/nori-800-based Zn–H₂O₂ battery achieved a high maximum power density, of 476 mW cm⁻², and a specific energy density of 964 W h kg⁻¹ at 50 mA cm⁻².