摘要
为改善碳纤维(CF)电极比电容小、自噪声大、低频电场响应弱的问题,采用高温碳化其表面共组装形成的酚醛树脂—嵌段共聚物(Resol-F127)薄膜的方法,制备了一种新型表面包覆有序介孔碳的CF(OMC/CF)复合电极。通过形貌观察得到OMC在CF表面呈现出有序的二维六方排布结构,孔径约为16 nm,极大增加了复合电极的比表面积,促使提高比电容(37.1 F/g),降低电荷转移电阻和低频容抗。在电场响应方面,OMC的包覆有利于增强对0.01~1 Hz的低频电场响应,促进改善波形信号响应的精准性、灵敏度、线性度,电极自噪声可降至0.73 nV/Hz^(1/2)@1 Hz,有利于水下微弱低频信号探测。该OMC/CF复合电极的开发为高灵敏、低自噪声海洋电场电极的研制提供了新的思路。
To address the problem of small specific capacitance,large self-noise,and weak electric field response and of carbon fiber(CF)electrodes,a novel ordered mesoporous carbon coated CF(OMC/CF)composite electrode is prepared by the high temperature carbonization of the phenolic resin-block copolymer(Resol-F127)film,which is co-assembly formed on the surface CF.The OMC exhibits a two-dimensional hexagonal arrangement with a pore size of about 16 nm,which greatly increases the specific surface area of the composite electrode,promoting the increase of high specific capacitance(37.1 F/g)and the reduction of charge transfer resistance and capacitive reactance.In terms of electric field response,the coated OMC is beneficial to improve the response to low-frequency electric field range of 0.01~1 Hz,obtaining the improvement of waveform signal response in the accuracy,sensitivity and linearity and the electrode self-noise can be reduced to 0.73 nV/Hz^(1/2)@1 Hz,which is conducive to the detection of weak low-frequency signals underwater.The preparation of the OMC/CF composite electrode provides a new approach for the innovative development of high-performance marine electric field electrodes with high sensitivity and low self-noise.
作者
陶登虎
奚馨
沈超超
钱良
刘瑞丽
苏跃增
TAO Denghu;XI Xin;SHEN Chaochao;QIAN Liang;LIU Ruili;SU Yuezeng(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《传感器与微系统》
北大核心
2025年第12期28-32,37,共6页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(52271347,62204153)
中国博士后科学基金资助项目(2022M710096,2022TQ0211)。
关键词
海洋电场电极
碳纤维电极
有序介孔碳
电化学性能
电场响应性能
marine electric field electrode
CF electrode
OMC
electrochemical property
electric field response property
