新型炭材料Issue(2)：141-149,9.DOI:10.1016/S1872-5805(15)60180-9
氧化煅前针状焦制备超级电容器用纳米多孔炭
Nanoporous carbons from oxidized green needle coke for use in high performance supercapacitors
摘要
Abstract
Green needle coke was oxidized by a mixture of HNO3 and H2SO4(3:7 vol/vol) acids. The resultant oxidized coke was separated into water dispersible and non-dispersible fractions, which were then activated by KOH using the same KOH/coke weight ratio to obtain two kinds of nanoporous carbons with different pore structures. The oxidized coke and the nanoporous carbons were characterized by XPS, XRD, TEM, N2 adsorption and electrochemical tests. Results indicate that, at the same KOH/coke ra-tios, the nanoporous carbons derived from the water-dispersible oxidized coke have higher mass specific capacitances and capacitance retention ratios, and lower resistances than those from the non-dispersible ones when used as an electric double layer capacitor elec-trode in 6 mol/L KOH, but the former have a lower volumetric specific capacitance than the latter.关键词
超级电容器/水可分散中间体/表面性质/多孔结构/倍率特性Key words
Supercapacitor/Water dispersible intermediate/Surface property/Porous structure/Rate performance分类
化学化工引用本文复制引用
王九洲,王立群,陈明鸣,王成扬,张翠,何琲..氧化煅前针状焦制备超级电容器用纳米多孔炭[J].新型炭材料,2015,(2):141-149,9.基金项目
国家自然科学基金(51372168) （51372168）
天津市重点基金(12JCZDJC27000).@@@@ National Natural Science Foundation of China (51372168) （12JCZDJC27000）
Natural Science Foundation of Tianjin City (12JCZDJC27000) （12JCZDJC27000）
