Electric Field Effect On Charge-Discharge Characteristics Of Textile-Based Energy Storage Devices: In Search Of The Underlying Mechanism

The work focused on studying the effect of charging voltage level and the absence of electrode between the measured electrodes on the charge storage profile. The device was applied on a three layered of 5 x 5 cm laminated textile fabric with hydrophobic surface. Stainless steel filament yarns were used as electrodes. As electrolyte, seven layers of the electro-active polymer PEDOT:PSS dispersion was consecutively drop-coated and dried under the temperature of 90-100 degrees C. During the course of the experiments, the devices were charged and discharged and their response or voltage decay was recorded. The results showed that the higher the charging voltage, the higher the amount of charges stored. The increase in the output voltage was not proportional to the input voltage which means that the device did not behave as either a pure capacitor or a pure battery. The ions movement was confirmed to be involved in the charge-discharge mechanism of the device.