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Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (2): 363-371.doi: 10.3969/j.issn.1000-1093.2022.02.014

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Electrochemical and Electric Field Response Performances of Nitrogen-doped Carbon Fiber Electrode Modified with HydrazineHydrate

SUN Jiuzhe, ZHAO Honghao, HAN Yongkang, XU Jiawei, FU Yubin   

  1. (School of Materials Science and Engineering, Ocean University of China, Qingdao 266000, Shandong, China)
  • Online:2022-03-28

Abstract: The modification on the surface of carbon fiber by nitrogen doping is expected to improve its electrochemical performance and electric field response performance. A new type of ocean electric field electrode was prepared using hydrazine hydrate as the nitrogen source to modify the viscose-based carbon fibers, and the changes in electrochemical performance and electric field response performance of electrode before and after modification were explored. The results show that the electrochemical performance and electric field response performance of the modified carbon fiber electrode are significantly improved. The high-temperature heat-treated nitrogen-doped sample after modification with hydrazine hydrate has the best performance, and its specific capacitance reaches 102.5 F/g, and is 18.99 times that of the blank group; the charge transfer resistance and the low-frequency capacitive reactance are greatly reduced respectively. The potential stability of electrode is improved, and the electrode can stably respond to 1 mV, 1 mHz low frequency and low intensity electric field signals; and its response sensitivity and accuracy are also significantly improved.The modified electrode can be used to prepare high-performance marine electric field sensors and improve the detection capability of underwater electric field.

Key words: carbonfiberelectrode, hydrazinehydrate, nitrogendopingmodification, electrochemicalperformance, electricfieldresponseperformance

CLC Number: