Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal Communications in Science and Technology
Della Puspita
Department of Mechanical Engineering, Sekolah Tinggi Teknologi Pekanbaru, Pekanbaru 28291 Indonesia
Engineering

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Dense porous monolithic carbon from Indonesian daikon leaf waste via NaOH–CO2 physicochemical activation for binder-free volumetric supercapacitors Apriwandi; Widya Sinta Mustika; Julnaidi; Della Puspita; Rika Taslim; Erman Taer
Communications in Science and Technology Vol 11 No 1 (2026)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.11.1.2026.2000

Abstract

High-performance volumetric supercapacitors are often limited by the trade-off between porosity and electrode density in biomass-derived carbon. Herein, binder-free monolithic carbon electrodes were produced from Indonesian daikon leaf waste through 0.5 M NaOH pretreatment followed by integrated N2–CO2 thermal processing. NaOH activation increased the surface area from 236 to 570 m2 g−1, increasing carbon purity from 88.34 to 95.45 wt% while retaining 4–5 wt% oxygen functionalities. The activated monolithic carbon electrode (VSAC) delivered a volumetric capacitance of 169 F cm−3 at 1 mV s−1 and 185 F cm−3 at 10 mA cm−2 in a symmetric two-electrode configuration without binders or conductive additives. VSAC also retained 83.2% capacitance at high scan rates and achieved 16.01 Wh L−1 at 838 W L−1. The improved performance arises from interconnected ion pathways, preserved electrode density, and surface oxygen functionalities, demonstrating a sustainable strategy for practical volumetric supercapacitors.
Co-Authors Apriwandi Erman Taer Julnaidi Rika Taslim Widya Sinta Mustika