KOH活化硅藻土模板炭及其电化学性能研究  

KOH Activation of Diatomite-templated Carbon and Its Electrochemical Property in Supercapacitor

作　　者：李爱军[1] 传秀云[1] 黄杜斌[1] 曹曦[1] 

机构地区：[1]北京大学地球与空间科学学院造山带与地壳演化教育部重点实验室,北京100871

出　　处：《材料研究学报》2017年第5期321-328,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51274015);中国博士后科学基金(2015M580915)~~

摘　　要：以硅藻土为模板,糠醇为碳源,合成了模板炭材料,并用KOH活化制备多孔炭材料。利用XRD、拉曼光谱、SEM及N_2吸附对其结构进行表征,并对比研究了活化前后炭材料的电化学性能。结果表明:活化后模板炭的无序度增加,电化学性能有显著的提高。在1 A·g^(-1)的电流密度下,活化后的多孔炭比容量为45.0~69.2 F·g^(-1);在20 A·g^(-1)充放电时,比电容保持率仍可达45%以上。说明活化后的多孔炭材料具有良好的电化学性能,是较好的双层电容器电极材料。Diatomite-templated carbon was prepared with diatomite as template and furfuryl alcohol （FA） as carbon resource, which was further activated with potassium hydroxide as activating agent. The prepared carbon materials were characterized by means of X-ray diffraction （XRD）, Raman spectrosco- py, scanning electron microscopy （SEM） and N2 adsorption. Simultaneously, the electrochemical proper- ties of the porous carbon before and after activation were studied. The results show that the porous car- bon after activation has higher degree of disorder in chemical structure and better electrochemical proper- ties rather than the one before activation. The specific capacitance of the porous carbon was in the range from 45.0 to 69.2 F.g-1 by the current density of 1 A g1 and the capacitance retention remains more than 45% by the current density of 20 A g-l. These results show that the porous carbon after activation has good electrochemical performance and it＇s an ideal material for electric double layer capacitor.

关 键 词：无机非金属材料 多孔炭 模板法 KOH活化 电化学性能 

分 类 号：TM242[一般工业技术—材料科学与工程] TM53[电气工程—电工理论与新技术]