摘要
以十二烷基苯磺酸钠(SDBS)为掺杂剂,氯化高铁为氧化剂,采用化学氧化法制备了聚吡咯/多壁碳纳米管(PPy/MWCNTs)复合材料,并以该复合材料制备海底微生物燃料电池的阳极,并测试了改性阳极及电池的电化学性能。研究表明,聚吡咯紧密包裹在MWCNTs表面,改性阳极最大交换电流密度0.66 m A/cm2,是未改性的3.6倍。改性电池的最大功率密度为408.8 m W/m2,是未改性电池的5倍多。改性电极的电容是赝电容和双电层电容协同作用的结果,显著提高了电子传递效率和抗极化性能。提出了一种阳极/生物膜界面电子传递的新机理。
Polypyrrole / multi-walled carbon nanotubes（ PPy / MWCNTs） composite was synthesized by chemical oxidative polymerization method using SDBS as dopant,Fe Cl3·6H2O as oxidant and the composite material is utilized to prepare the anode in marine sediment microbial fuel cell. The electrochemical properties of the modified anode and cell were tested. The results reveal that MWCNTs is tightly coated by polypyrrole and its maximum exchange current density is 0. 66 m A / cm2,3. 6 times more than the unmodified. The maximum power density of modified cell reaches 408. 8 m W / m2,5 times higher than that of the battery unmodified. The modified electrode capacitance is a synergistic result of pseudocapacitive and electric double layer,which greatly improves electrons transfer efficiency and its anti-polarization capability. A new electron transfer mechanism in the interface between the modified anode and biofilm was also presented.
出处
《材料开发与应用》
CAS
2015年第3期61-67,共7页
Development and Application of Materials
基金
国家海洋局可再生能源专项基金(GHME2011GD04)
山东省重点自然科学基金(ZR2011BZ008)
