油茶果皮基碳材料的制备及其在超级电容器中的应用研究

Preparation of camellia oleifera peel-derived carbon materials and their application in supercapacitor

通过碳化和活化两步法将油茶果皮废弃物转化为生物质多孔碳材料,并探究其在超级电容器电极材料中的应用。结果表明,活化过程中碳/碱质量比和温度对碳材料的结构有很大影响,当碳/碱质量比为1∶3、活化温度为700℃时制得的碳材料具有最高的比表面积(2453 m^(2)/g)、最大孔容(1.08 cm^(3)/g)以及丰富的边缘缺陷位点。这些特性增加了电极的活性位点,促进了离子传输,进而表现出优异的电容性能(电流密度为1 A/g时质量比电容为382.1 F/g)以及优良的循环稳定性。

Biomass porous carbon materials(TPC)are prepared via a carbonization-activation two-step method using camellia oleifera peel as the precursor,and used as an electrode material for supercapacitor.It is found that both the ratio of carbon to alkali and the temperature during the activation process greatly influence the structure of TPC.The carbon material produced at a carbon/base mass ratio of 1:3 and an activation temperature of 700℃has the highest specific surface area(2,453 m^(2)·g^(-1)),the largest pore volume(1.08 cm^(3)·g^(-1))and abundant edge defects.These properties can increase the active sites within the electrode and promote ion transport,and result in excellent capacitive performance and cycling stability.The mass specific capacitance is 382.1 F·g^(-1)at a current density of 1 A·g^(-1).