石油焦预氧化对多孔碳结构及电化学电容特性的影响

Influence of Petroleum Coke Preoxidation on the Pore Structure and Capacitive Property of Porous Carbons

利用双氧水和硝酸对石油焦进行预氧化,考察其对石油焦基多孔碳孔结构、表面化学性质及电化学电容特性的影响。研究发现,硝酸预氧化对石油焦基多孔碳影响较大,可以提高材料的介孔含量及氧含量,不仅可以提高材料的赝电容,而且可以增强电极材料在水系电解液中的浸润性,从而提高比电容和倍率特性。

The effects of coke peroxidation by H2O2 and HNO3 on the pore structure,surface chemistry and electrochemical capacitive property of the resulting porous carbons were investigated. The results showed that HNO3 preoxidation has significant effects on the resulting carbon,e. g. improving its mesopore and oxygen contents. These not only improve the pseudocapacitance,but also optimize the wettability of the carbon,and facilitate capacitance and rate performance of the porous carbon.