Enhancing supercapacitor energy density via KMnO4-activated apple waste-derived carbon and aqueous trifluoroacetic acid electrolyte

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhancing supercapacitor energy density via KMnO4-activated apple waste-derived carbon and aqueous trifluoroacetic acid electrolyte

Popis výsledku v původním jazyce

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&lt;inf&gt;4&lt;/inf&gt;), 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 (&gt;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&lt;inf&gt;2&lt;/inf&gt;SO&lt;inf&gt;4&lt;/inf&gt;. 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.

Název v anglickém jazyce

Enhancing supercapacitor energy density via KMnO4-activated apple waste-derived carbon and aqueous trifluoroacetic acid electrolyte

Popis výsledku anglicky

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&lt;inf&gt;4&lt;/inf&gt;), 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 (&gt;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&lt;inf&gt;2&lt;/inf&gt;SO&lt;inf&gt;4&lt;/inf&gt;. 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40500 - Other agricultural sciences

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Biomass and Bioenergy

ISSN

1873-2909

e-ISSN

0961-9534

Svazek periodika

201

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

nestránkováno

Kód UT WoS článku

001524774800002

EID výsledku v databázi Scopus

2-s2.0-105009326614