中孔脲醛树脂炭用作超级电容器电极材料  

Mesoporous urea-formaldehyde resins carbons used as supercapacitor electrode materials

作　　者：董英男[1] 王大林[1] 王成扬[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《电源技术》2014年第6期1099-1102,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(50902102);国家"863"高技术研究发展计划(2011AA11A232)

摘　　要：采用甲酸作为催化剂,以尿素和甲醛为原料,通过控制脲醛摩尔比例制备具有不同孔结构的脲醛树脂微球,并进一步碳化处理得到具有发达中孔的脲醛树脂基炭微球。采用扫描电镜、透射电镜、N2吸附手段对所得两种前驱体及碳化产品的形貌与孔结构进行了表征;采用循环伏安法和恒流充放电法,在质量分数30%KOH电解液中对其充放电性能进行了研究。结果表明,所制备的中孔炭BET比表面积达到609 m2/g,总孔容达到1.15 cm3/g。在50 mA/g的充放电电流密度下中孔炭样品UF0.4-800的比电容达到了205 F/g,电流密度10 A/g时与50 mA/g时比电容的比值C10 000/50为67%。说明具有丰富孔结构的脲醛树脂基炭微球是一种具备大电流充放电潜力的超级电容器电极材料。Urea and formaldehyde were used as raw materials to prepare urea-formaldehyde resins microspheres of different porous structures by using formic acid as catalyst and controlling mole ratio of two raw materials. Upgrowth mesoporous urea-formaldehyde resins carbon microspheres were obtained by further carbonization. The morphology and pore structure of two prepared precursors and carbonization products were characterized by SEM, TEM and N2 sorption. Its charging and discharging performance in 30 wt% KOH electrolyte systems was investigated by galvanostatic charge/discharge and cycle vohammetry. The results show that prepared mesoporous carbon possesses high specific surface area as 609 m2/g, and its total pore volume reaches 1.15 cm3/g. The specific capacitance of sample UF0.4-800 reaches 205 F/g at the current density of 50 mA/g, and the ratio of specific capacitances （C10000/50） at 10 and 50 mA/g is 67%, suggesting that urea-formaldehyde resins carbon microspheres with abundant pore structures is an electrode material for supercapacitors with the potential of high current charging and discharging.

关 键 词：脲醛树脂 炭材料 多孔材料 高比表面积 超级电容器 电化学性能 

分 类 号：TM53[电气工程—电器]