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以丝瓜络作为前驱体,KOH为活化剂,在不同温度下炭化、活化制备活性炭,并将其作为超级电容器电极材料。采用N2吸附及电化学测试对活性炭的孔结构和电化学性能进行了表征,研究了炭化温度、碱炭比对活性炭电极材料孔结构和电化学性能的影响。结果表明:丝瓜络经过一步炭化即可制备出电化学性能优异的炭材料,经过KOH活化后比电容明显增加,在碱炭比为2时制备活性炭的比表面积、总孔容分别达到1549m2/g和0.901cm3/g,比电容达到228F/g,是未活化炭化物比电容的2.5倍,是一种理想的电极材料。活性炭作为电极材料,其比表面积存在一个最佳值,孔的容积、大小和形状对电解质离子的储存、扩散有着重要作用,对电化学性能有很大影响。
Using loofah as precursor, KOH as activator, carbonized at different temperatures and activated to prepare activated carbon, which is used as an electrode material of the supercapacitor. The pore structure and electrochemical performance of activated carbon were characterized by N2 adsorption and electrochemical tests. The effects of carbonization temperature and alkali / carbon ratio on the pore structure and electrochemical performance of activated carbon electrode materials were investigated. The results showed that the carbonaceous material with excellent electrochemical properties could be prepared by one-step carbonization. After KOH activation, the specific capacitance increased obviously. The specific surface area of activated carbon prepared at the ratio of alkali to carbon of 2 was 1549m2 / g And 0.901cm3 / g, the specific capacitance of 228F / g, is not activated carbonized capacitor 2.5 times, is an ideal electrode material. Activated carbon as the electrode material, the specific surface area of an optimal value, pore volume, size and shape of the electrolyte ion storage and diffusion has an important role in the electrochemical properties have a significant impact.