摘要
针对不同含量石墨烯/纳米银改性的Ag/AgCl电极分别进行交流阻抗、扫描电镜、吸水率和电位稳定性测试。实验结果表明:随着石墨烯/纳米银含量的增加,改性Ag/AgCl电极的界面结构参数弥散系数C_(dl)-P增大,电容值C_(dl)-T减小,动力学特征参数电荷转移电阻R_(ct)先减小后增大。基于交流阻抗测试得到的电极动力学特征信息及界面结构信息与电极的扫描电镜、吸水率以及电位稳定性测试结果基本吻合。石墨烯/纳米银对Ag/AgCl电极的改性主要体现在提高电极的表面均匀性和导电性,但是降低了电极的孔隙率,这3个方面影响的协同作用反映了石墨烯/纳米银对Ag/AgCl电极改性的内在机制。
AC impedance,scanning electron microscopy,water absorption and potential stability test were carried out for Ag/AgCl electrodes modified by graphene/nano silver with different content.The experimental results show that with the increase of graphene/nano silver content,the interface structure parameter C_(dl)-P of the modified Ag/AgCl electrode increases,the capacitance value C_(dl)-T decreases,and the dynamic characteristic parameter charge transfer resistance R_(ct) first decreases and then increases.The electrode dynamic characteristic information and interface structure information obtained based on AC impedance test are basically consistent with the scanning electron microscope,water absorption and potential stability test results of the electrode.The modification of Ag/AgCl electrode by graphene/nano silver is mainly reflected in three aspects:improving the surface uniformity and conductivity of the electrode,and reducing the porosity of the electrode.The synergistic effect of these three aspects reflects the internal mechanism of the modification of Ag/AgCl electrode by graphene/nano silver.
作者
李红霞
徐瑞昌
辛颉
谢一戎
LI Hongxia;XU Ruichang;XIN Jie;XIE Yirong(Department of Basic Courses,Naval University of Engineering,Wuhan 430033,China;92351 troops of the Chinese People’s Liberation Army,Sanya 572011,Chin;Wuhan Britain-China School,Wuhan 430030,China)
出处
《兵器装备工程学报》
CAS
CSCD
北大核心
2024年第7期242-246,282,共6页
Journal of Ordnance Equipment Engineering
基金
海军工程大学自主研发项目(2022501100)。
