以MgO为模板制备超级电容器用电极材料  

Synthesis of supercapacitor electrode material using MgO as a template

作　　者：刘文杰[1] 王九洲[1] 陈明鸣[1] 王成扬[1] 

机构地区：[1]天津大学绿色合成与转化教育部重点实验室,天津300072

出　　处：《电源技术》2014年第6期1103-1106,共4页Chinese Journal of Power Sources

摘　　要：以热固性酚醛树脂(PF)为炭前驱体,柠檬酸镁为模板MgO的前驱体,制备了中孔炭材料。结合N2吸脱附等温线及透射电子显微镜法(TEM)照片推断出所得中孔炭的孔结构为平行板型狭缝孔。将中孔炭材料用作超级电容器的电极材料,并在质量分数30%KOH电解液中对其进行循环伏安性能和恒流充放电测试。以MgO∶PF质量比8∶2制备的样品炭材料的比表面积为1 722 m2/g,在50 mA/g的电流密度下比电容为186.8 F/g。另外,以MgO∶PF质量比7∶3制备的样品具有合适的中孔比例,因而在高电流密度下表现出较好的倍率特性,C1000/C50(电流密度分别为1 000和50 mA/g时的比电容之比)达89.5%。Mesoporous carbons were synthesized using thermosetting phenolic resin（PF） as carbonaceous precursor and magnesium citrate as template MgO precursor. Pore structure of the prepared mesoporous carbon was determined as parallel-plate-structure slit type geometry through N2 adsorption/desorption isotherm curves and TEM images. The mesoporous carbons prepared were then applied as electrode material for electric double-layer capacitors. The capacitor performance was examined in 30 wt% KOH electrolyte by cyclic voltammetry and galvanostatic charge/discharge measurements. The carbon material prepared with MgO ： PF mass ratio of 8 ： 2 has a BET surface area of 1 722 m2/g and exhibits a specific capacitance of 186.8 F/g at a current density of 50 mA/g; the carbon material prepared with the ratio of 7 ： 3 has the optimized proportion of mesopores, showing good rate performance at high current density, C1000/C50 expressing as the ratio of the capacitance measured at 1 000 mA/g against that at 50 mA/g is up to 89.5%.

关 键 词：中孔炭 孔结构 超级电容器 倍率特性 

分 类 号：TM53[电气工程—电器]