Combine Natural Stibnite with Bio-Carbon: A High-Capacity Composite Anode Material for Lithium-Ion Battery

The organic components of biomass are the main material basis for the formation of carbon skeleton. Different components will evolve into different pore structures through different structures’ evolution during the preparation process. It has high specific capacity due to its high specific surface area, and grading porosity can provide sufficient active sites for lithium-ion. Therefore, in this paper, the Sb 2 S 3 ore@LPC composite anode material was prepared by ball milling-melting method using cheap natural stibnite (Sb 2 S 3 ore) and the activated lotus pollen porous carbon (LPC). The electronic conductivity of natural stibnite was modified by using pollen-derived carbon materials. Meanwhile, the high specific surface area of LPC can shorten the diffusion paths of lithium ions and electrons, while providing a larger active area for Sb 2 S 3 , which improves the stability of the composite anode material in the cycle process. The Sb 2 S 3 ore@LPC composite anode material still maintains a reversible specific capacity of 590 mAh g −1 after 100 cycles at a current density of 200 mA g −1 . The feasibility of using LPC as carbon source and natural stibnite to prepare composite anode electrode material is proved. The method conforms to the concept of green chemistry, which has the characteristics of simplicity and environmental protection.