# Synergistic Effects of K2CO3 and Melamine on Enhancing the Performance of Date Stone‐Derived Supercapacitors

## TL;DR

This paper shows how date stones can be turned into high-performance supercapacitors using potassium carbonate and melamine, offering a sustainable energy storage solution.

## Contribution

The novel use of K2CO3 and melamine together in a two-stage pyrolysis process to enhance the performance of date stone-derived supercapacitors.

## Key findings

- The activated carbon achieved a specific capacitance of 209.36 F g−1 at 0.5 A g−1.
- It showed excellent cycling stability over 5000 cycles at 10 A g−1.
- The material delivered high energy and power densities of 24.47 Wh kg−1 at 2500 W kg−1.

## Abstract

Biomass‐derived carbon materials play a crucial role in advancing electrochemical energy storage technologies toward a cleaner and more sustainable future. This study investigates the potential of date stone biomass as a sustainable precursor for fabricating high‐performance supercapacitor electrodes. A two‐stage pyrolysis process is utilized, incorporating K2CO3 as an activating agent and melamine as a nitrogen dopant. The synergistic interaction of these additives results in an activated carbon material with a significantly improved surface area, pore volume, and nitrogen content. The electrochemical analysis reveals a high specific capacitance of 209.36 F g−1 at 0.5 A g−1, excellent cycling stability over 5000 cycles at 10 A g−1, and high energy and power densities (24.47 Wh kg−1 at 2500 W kg−1). This study demonstrates the feasibility of utilizing date stone biomass as a renewable resource for advanced carbon‐based materials in energy storage applications, contributing to a more sustainable future.

This study showcases date stones as a sustainable source for high‐performance supercapacitors. A two‐stage pyrolysis with potassium carbonate and melamine created a nitrogen‐doped carbon with a high surface area. The resulting electrode achieved 209.36 F g−1 specific capacitance, excellent cycling stability, and high energy/power densities (24.47 Wh kg−1 at 2500 W kg−1), demonstrating its promise for advanced energy storage applications.© 2025 WILEY‐VCH GmbH