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以富含蛋白质的豆腐为原料,经冷冻干燥和炭化过程制备出多孔炭材料,利用SEM、FTIR、XPS、Raman以及XRD等分析手段研究了所得炭材料的物理化学性能。将其作为锂离子电池负极材料使用时,在50 mA·g~(-1)的电流密度下,首次恒流充电容量可达817.6 m A·h·g~(-1),循环10次可维持351.9 m A·h·g~(-1)的可逆比容量,当电流密度上升至2 A·g~(-1)时,仍可维持76.5 mA·h·g~(-1)的可逆比容量,表明多孔炭材料具有良好的电化学性能。
Porous carbon materials were prepared by freeze-drying and carbonization using protein-rich tofu as raw material. The physicochemical properties of the obtained carbon materials were investigated by SEM, FTIR, XPS, Raman and XRD. When used as negative electrode material for lithium ion batteries, the first constant current charge capacity can reach 817.6 mA · h · g -1 at a current density of 50 mA · g -1, The reversible capacity of 351.9 mA · h · g -1 was maintained. When the current density increased to 2 A · g -1, the reversible capacity of 76.5 mA · h · g -1 was still maintained Specific capacity, indicating that the porous carbon material has good electrochemical properties.