Low delay flexible paper-based electrode for capacitive sensor filled through carbon-based materials

Flexible electrodes are widely used in the manufacture of flexible sensors and wearable devices. However, with the development of science and technology and the large-scale utilization of metal resources, the question whether alternative materials can be found to ease the use of metal materials has been raised. Among them, paper-based electrodes have attracted special attention in the industry because of their degradability, low cost and high flexibility. Therefore, a low delay flexible paper-based electrode filled for capacitive sensors is proposed through carbon materials. Different from discussing the influence of single fiber, the paper-based electrode is manufactured by wet process. The effects of different fiber substrates on the physical properties and electrical signal properties of paper-based electrodes were discussed. The results show that the paper-based electrode has high conductivity, which is 18.52 S/cm. And there is a low delay in the process of electrical signal transmission. The phase frequency angle hardly changes at the signal frequency of 1 kHz, and the change of phase frequency angle is only 4.9 ° at the signal frequency of 300 kHz. The thickness of the guided electric paper is about 90 μm. Lower than common paper products. This study shows that the paper-based electrode has the advantages of high conductivity, low hysteresis, light and thin, which provides the possibility to be used as a flexible electrode.