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以尿素为氮源,对碳纤维表面进行改性,制备了一种新型海洋电极,并测试了其电化学性能和电场响应性能。结果表明,碳纤维表面的含氧和含氮基团对其电化学性能具有显著的影响,与尿素反应并在450℃条件下热处理的碳纤维具有最低的内阻和最大的比电容。电化学性能的变化也直接影响碳纤维电极对的电场性能,450℃条件下热处理的碳纤维电极也具有最佳的电场性能:电极对极差稳定性降到0.1 m V/24 h左右,自噪声为2.2 n V/rt Hz@1Hz,电极对能较好地响应出1 m Hz、1 m V电场信号。
Using urea as a nitrogen source, the carbon fiber surface was modified to prepare a new type of marine electrode, and its electrochemical performance and electric field response were tested. The results show that the oxygen and nitrogen-containing groups on the surface of carbon fiber have a significant influence on the electrochemical performance. The carbon fiber reacted with urea and heat-treated at 450 ℃ has the lowest internal resistance and the largest specific capacitance. Electrochemical properties also directly affect the electric field performance of carbon fiber electrode pairs. The heat treatment of carbon fiber electrode at 450 ℃ also has the best electric field performance: the poor stability of the electrode pair is reduced to about 0.1 m V / 24 h, the self noise 2.2 nV / rt Hz @ 1Hz, the electrode pair can respond well to 1 m Hz, 1 mV electric field signal.