Improving the Electrochemical Energy Storage Capacity of the Renewable Carbon Derived from Industrial Tea Waste
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Date
29.06.2022Author
Karamustafa, AyşenurSözer, Sözer
Merve Buldu-Akturk
Emre Erdem
Akgül, Gökçen
Oskay, Kürşat Oğuz
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Ayşenur Karamustafaa, Sözer Sözera , Kürşad Oğuz Oskayb , Merve Buldu-Akturkc, Emre Erdemc , and Gökçen Akgüla, * a Department of Energy Systems Engineering, Engineering Faculty, Recep Tayyip Erdogan University, Rize, 53100 Turkey b Department of Metallurgy, Engineering Faculty, Cumhuriyet University, Sivas, 58140 Turkey c Department of Materials Science and Nano Engineering, Sabancı University, Istanbul, 34956 Turkey *e-mail: gokcen.akgul@erdogan.edu.tr Received September 14, 2021; revised January 10, 2022; accepted January 29, 2022Abstract
Energy storage is gaining a vital role since the usage of portable electric/electronic devices and
vehicles have been growing. Capacitors, called as electrochemical double layer capacitors or supercapacitors,
find application on wide scale devices from mobile vehicles to huge electric vehicles with high energy and
power densities, fast charge and discharge properties. Hence, energy is stored at the electrode–electrolyte
interface, the electrode material forms the heart of this energy storage system. When the decreasing reserves
of fossil resources and their environmental damages are considered, renewable 3-dimentional carbon could
be a solution in the capacitor as carbon electrodes. Biomass-derived renewable carbon is cost-effective, abundant, sustainable, safety and environmentally friendly material. In this work, renewable carbon material was
derived from industrial tea waste and three methods of graphitization, activation and heteroatom doping were
implemented alltogether to develop the energy storage capacity of material. The structural ordering, surface
area growth and capacitive contribution promoted the energy storage capacity to 25 F/g and high power density to 2.6 kW/kg of biowaste derived carbon