Enhancing supercapacitor energy density via KMnO4-activated apple waste-derived carbon and aqueous trifluoroacetic acid electrolyte
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63595778" target="_blank" >RIV/70883521:28610/25:63595778 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0961953425005537?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0961953425005537?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.biombioe.2025.108142" target="_blank" >10.1016/j.biombioe.2025.108142</a>
Alternative languages
Result language
angličtina
Original language name
Enhancing supercapacitor energy density via KMnO4-activated apple waste-derived carbon and aqueous trifluoroacetic acid electrolyte
Original language description
The conversion of biowaste into cost-effective porous carbons for electrode materials represents a promising strategy for sustainable energy storage. However, such materials often suffer from low specific capacitance and energy density. In this study, activated carbons (ACs) were synthesized from apple waste (AW) through chemical activation with potassium permanganate (KMnO<inf>4</inf>), followed by carbonization at 650–800 °C. The as-prepared AW AW-derived ACs were characterized and evaluated in both three-electrode and symmetric supercapacitor configurations across different electrolytes. The resulting AW-derived carbons exhibited a large specific surface area (>1000 m2 g−1) and demonstrated good electrochemical performance, with a specific capacitance of 360 F g−1 at 1 A g−1. The AW-based electrode using a trifluoroacetic acid (TFA) electrolyte exhibited a wide potential window (−0.5 V–1 V vs. Calomel), outperforming traditional electrolytes like KOH and H<inf>2</inf>SO<inf>4</inf>. The symmetric device had exceptional cycling stability, maintaining 93.5 % of its initial capacitance after 5000 cycles, and attained an energy density of 14.5 Wh kg−1 alongside a power density of 345.3 W kg−1. These results show the viability of biowaste-derived carbons as efficient, sustainable materials for next-generation supercapacitors.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
40500 - Other agricultural sciences
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Biomass and Bioenergy
ISSN
1873-2909
e-ISSN
0961-9534
Volume of the periodical
201
Issue of the periodical within the volume
Neuveden
Country of publishing house
GB - UNITED KINGDOM
Number of pages
15
Pages from-to
nestránkováno
UT code for WoS article
001524774800002
EID of the result in the Scopus database
2-s2.0-105009326614