Preparation of rice husk-derived porous hard carbon: A self-template method for biomass anode material used for high-performance lithium-ion battery

Hard carbon materials are employed as a novel anode material in lithium ion batteries (LIBs) due to its large specific surface area, high specific capacity and stable cycle performance. In this work, we report the use of SiO2 as a template to prepare porous hard carbon materials from the environmental-friendly rice husks (RHs), among which the porous carbon material hydrothermally treated for 24 h exhibits splendid micro-morphology and excellent electrochemical performance. The charge specific capacity can still reach 679.9 mAh g(-1) after 100 cycles at a current density of 0.2C. Such significant improvement in electrochemical performance is attributed to the edges, defects and large specific surface area possessed by the porous structure.

Automated summary

In this study, porous hard carbon materials were successfully prepared from rice husks using SiO2 as a template, exhibiting excellent micro-morphology and electrochemical performance. The charge specific capacity can still reach 679.9 mAh g(-1) after 100 cycles at 0.2C, attributed to the edges, defects and large specific surface area of the porous structure.