A Biomass-Based Hierarchical Carbon Via Mofs-Assisted Synthesis for High-Rate Lithium-Ion Storage

Abstract

A hierarchical nanostructured biomass-based carbon material derived from banana peels slurry and ZIF-8 hybrids (HNBZC) is introduced with excellent lithium-ion storage and rate capability. HNBZC was prepared through a hollow MOFs-assisted hard template strategy, in which we can easily control the pore size and doping element content to further improve the electrochemical performance of biomass-based carbon. HNBZC can reversibly deliver a capacity of 620 mAh g -1 at current densities of 20 mA g -1 , and 61 mAh g -1 is still obtained at a high current density of 50 A g -1 . Furthermore, a capacity retention ratio of 80% is achieved after 780 cycles at 5 A g -1 . Our results indicate a promising method to obtain a carbon material with enhanced electrochemical performance based on natural biomass waste.

Keywords: Biomass-based carbon, banana peel, ZIF-8, lithium-ion batteries