阳极材料直接影响海底生物燃料电池的性能.本文采用一种新型改性试剂-Fenton试剂对石墨阳极进行改性处理.结果表明,改性后电极表面主要引入了羟基和羰基,接触角从82°减小到48°,亲水性明显提高.塔菲尔曲线显示,改性前后交换电流密度分别为0.05A/m2、0.17 A/m2,电极的动力学活性显著增加,提高了两倍之多.改性和未改性电池的最大输出功率密度分别为33.21 mW/m2、20.27 mW/m2,提高了64%.这是由于阳极表面处理后引入的羟基和羰基充当了电子转移介体,明显提高了电极反应动力学活性,增加了阳极表面细菌吸附数量,加速了阳极反应,提高了电池性能.该类高性能阳极材料可望用于海底生物燃料电池的开发.
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