Hierarchical N/O co-doped hard carbon derived from waste saccharomyces cerevisiae for lithium storage

Porous Carbon with Alumina Coating Nanolayer Derived from Biomass and the Enhanced Electrochemical Performance as Stable Anode Materials

With the ever-increasing world population, the energy produced from green, environmentally friendly approaches is in high demand. In this work, we proposed a green and cost-effective strategy for synthesizing a porous carbon electrode decorated with alumina oxide (Al₂O₃) from cherry blossom leaves using the pyrolysis method followed by a sol-gel method. An Al₂O₃-coating nano-layer (4-6 nm) is formed on the porous carbon during the composition fabrication, which further adversely affects battery performance. The development of a simple rich-shell-structured C@Al₂O₃ nanocomposite anode is expected to achieve stable electrochemical performances as lithium storage. A significant contributing factor to enhanced performance is the structure of the rich-shell material, which greatly enhances conductivity and stabilizes the solid-electrolyte interface (SEI) film. In the battery test assembled with composite C@Al₂O₃ electrode, the specific capacity is 516.1 mAh g^-1 at a current density of 0.1 A g^-1 after 200 cycles. The average discharge capacity of carbon is 290 mAh g^-1 at a current density of 1.0 A g^-1. The present study proposes bioinspired porous carbon electrode materials for improving the performance of next-generation lithium-ion batteries.