TRANSITION METAL DICHALCOGENIDE BASED PIEZOELECTRIC SUPERCAPACITOR

Abstract

In the present spectrum, the world is moving at a faster pace towards miniaturization, compatibility, lightweight, cheaper and easy integration of products. These days, maximising the use of renewable resources is crucial. In our daily life, we come across most of the mechanical energy in our surroundings which are wasted and unutilized. Piezoelectric supercapacitors show the potential to exploit this small-scale mechanical energy (vibrations) around us to convert it in the form of electrical energy and store it. In this work we have fabricated a self-charging symmetric supercapacitor device using WS2@PPY electroactive material (symmetric already implies this) and a PVDF film as both the separator and the potential generator. This device converts mechanical energy directly into electrochemical energy. Mechanical deformation under finger pressing action was used to illustrate the self charging capacity of the fabricated device. The device showed a maximum voltage of 900mV under pressing action in 60 seconds. This finding opens up the possibility of making flexible hybrid electronic devices having the capability to get self- powered.