Preparation of Electric Field Electrodes Based on Carbon Fibers Modified with Urea and Its Electrochemical Performances
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摘要: 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。Abstract: A new kind of marine electrode for electric field test was prepared by modifying carbon fiber with urea, and its electrochemical and electric field response performances were tested. The results show that the oxygen-containing and nitrogen containing groups on the surface of carbon fiber have significant effects on its electrochemical performances. The carbon fiber electrode treated with urea at 450℃ has the lowest internal resistance and maximum specific capacitance. The electrochemical performances also directly affect the electric field performances of its electrode pair. The carbon fibers treated with urea at 450℃has the best electric field performances:its potential drift was reduced to about 0. 1 m V/24 h, the self-noise was around 2. 2 n V/rt Hz@1 Hz, and its electrode pair shows a good response to the electric field signal at 1 m Hz, 1 m V.
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