Preparation and Characterization of Activated Carbon from Amla (Phyllanthus emblica) Seed Stone by Chemical Activation with Phosphoric Acid for Energy Storage Devices

Abstract

In order to mitigate climate change and ensure stable energy supply, energy storage is essential. Activated carbon (AC) has a large surface area which makes it ideal electrode for energy storage devices such as supercapacitors. In this work we have used Amla seeds as precursors to produce AC because of their novelty and managing agricultural waste. The AC was produced at temperatures of 4000C, 5000C, and 6000C using Phosphoric acid as activating agent. Their characterization showed AC prepared at 500 0C and 6000C had the highest surface area and amorphous contents. They also showed the comparatively high specific capacity of 0.113 Fcm−2 and 0.0729 Fcm−2 respectively for samples at temperatures 500oC and 600oC which means the AC prepared at these temperatures are suitable for energy storage devices.