摘要
首次应用机械振动研磨法在室温条件制备纳米活性炭电极材料,经过30min研磨后,得到了粒度分布在30～50nm之间的纳米活性炭(nm-AC),研究表明,这种纳米活性炭的结晶性得到了明显增强和改善,且孔径分布更趋于合理。并用溶胶-凝胶方法合成了掺杂氧化铋的纳米二氧化锰(nm-Bi-MnO2),将其与制备的纳米活性炭制成超级电容器所需的复合电极材料。与10%二氧化锰复合的纳米活性炭电极具有最佳的充放电性能,尤其是在掺杂氧化铋的情况下比电容能量达到308F.g-1,且随着电流增大没有显著的衰减。与此同时,用机械振动研磨法将二氧化锰与活性炭的混合物进行研磨改性,电化学分析表明,经机械振动研磨改性的二氧化锰的比电容相对较大,具有进一步提高电极材料性能的潜力。
Nano-actived carbon （nm-AC） electrode materials with different pore size distributions were prepared by roller vibration milling at room temperature. Mechanical vibration milling could obtain nm-AC of 30-50 nm, and improve the crystallinity of prepared nm-AC. Nano-bismuth oxide doped MnO2 was synthesized by the sol-gel method. The microstructure and the electrochemical performance of the nanocomposite electrode materials were examined. Mixing manganese dioxide materials with nm-AC at an optimum weight ratio （10%） might increase the specific capacitance of nm-AC effectively, and the mixed MnO2/active carbon raw material was modified by vibration milling. The nano-actived carbon/MnO2 electrode materials prepared by vibration milling and the sol-gel method were used in super-capacitors.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第2期514-519,共6页
CIESC Journal
基金
上海市纳米专项(05nm05027)
上海市教委(05EE09)~~
