亚铁盐对生物质碳结构及电容特性的影响

EFFECT OF FERROUS SALTS ON CARBON STRUCTURE AND CAPACITANCE CHARACTERISTICS OF BIOMASS

对生物质竹子负载亚铁盐热解制得的生物炭进行孔隙结构和傅里叶红外分析,并对热解焦炭制作超级电容器进行电化学实验研究。实验结果表明:负载亚铁盐的焦样孔径分布较为完整,具有良好的孔隙结构,高浓度负载得到的焦炭毛细凝聚现象更明显,其中30%浓度的Fe(CH_3COO)_2负载得到的焦炭毛细凝聚现象最为突出;在800℃高温下,焦炭表面官能团只剩下羟基和C==C键;相同浓度下FeSO_4比Fe(CH_3COO)_2和FeCl_2的加入对电容特性的影响效果更好;亚铁盐浓度的提高有利于活性焦炭制备的超级电容器电容特性的改善。

The pore structure and Fourier transform infrared analyses were carried out on the biochar obtained from pyrolysis of biomass bamboo loading ferrous salt, the electrochemical experiment of supercapacitors made from pyrolysis char was carried out. The experiment results show that the pore size distribution of coke sample loading ferrous salt is more complete, having good pore structure, the capillary condensation phenomenon of coke loading high concentrations is more obvious, and capillary concentration phenomenon of coke lading 30% concentration Fe （CH3COO）2 is the most prominent ; there only remain hydroxyl and C=C bond for functional groups on the surface of coke at high temperature of 800℃; the effect of FeSO4 on the capacitance characteristics is better than the same concentration Fe （CH3COO）2 and FeCI2; increasing ferrous salt concentration is conducive to improve capacitance characteristics of supercapacitor prepared by the active coke.