Structure Regulation and Application of Bagasse-Based Porous Carbon Material Based on H2O2-Assisted Hydrothermal Treatment

Biomass-based porous carbon has attracted much attentionof researchersdue to its wide range of raw materials, low cost, and other advantages.It has been also widely used in energy storage devices such as lithium-ionbatteries. The carbonization process and final morphology of biomassare indirectly affected by the surface modification and structureoptimization of the original biomass. The focus of this study is toprepare porous carbon, which can be used as an electrode materialof a lithium-ion battery by surface modification and structure regulationof biomass pretreatment. In this study, the method of H2O2-assisted hydrothermal treatment was used to preparea kind of bagasse based porous carbon materials that can be used inlithium-ion batteries. The reaction process of H2O2 and bagasse under hydrothermal conditions was explored anddescribed. The results showed that H2O2 promotedthe hydrolysis and oxidation of lignocellulose in bagasse and thesmall molecules obtained from lignocellulose hydrolysis under hydrothermalconditions would be repolymerized to form carbon spheres. The preparedcarbon material was applied to the lithium-ion battery. Under a currentdensity of 0.1 A g(-1), the specific capacity of 891mAh g(-1) in the first cycle was displayed, and aspecific capacity of 453 mAh g(-1) was maintainedafter 150 cycles. At the same time, it showed a good rate performance.After 10 cycles at current densities of 0.1, 0.2, 0.5, 1, 2, and 5A g(-1), the specific capacities of 545, 421, 307,245, 195, and 133 mAh g(-1) were obtained. All theraw materials and products used in this experiment are harmless tothe environment, which has certain guiding significance for the structuralregulation and green synthesis of lignocellulosic biomass-derivedcarbon materials.