Charge storage of Mo/Ti based MXenes for electrochemical capacitor application

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00639200" target="_blank" >RIV/68378271:_____/25:00639200 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0375057" target="_blank" >https://hdl.handle.net/11104/0375057</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2025.146691" target="_blank" >10.1016/j.electacta.2025.146691</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Charge storage of Mo/Ti based MXenes for electrochemical capacitor application

Popis výsledku v původním jazyce

This study provides insight into the preparation and energy storage response of double-transition metal carbides. Controlling etching parameters allows us to prepare Mo/Ti-based carbides with different energy storage performance. Effective strategies were employed to design MXene cells with more optimized and practical electrochemical performance. High-mass loading electrodes were integrated into symmetric and asymmetric systems using aqueous electrolytes with a wide pH range. Various alternatives, including asymmetric cell assembly, redox-active electrolytes, and replacing (+) MXene electrode by carbon electrode, were tested to improve the charge storage of the positive electrode, thereby improving the full cell response. In acidic media, an asymmetric cell based on (-) MXene and (+) BP2000 carbon black showed a high cell voltage (1.3 V) and a long cyclability (8000 cycles at 1 A g- 1) compared to the symmetric cell (0.8 V). We further showed that the cell capacitance in 1 M NaI can be significantly enhanced once (+) MXene is replaced by carbon black or activated carbon.

Název v anglickém jazyce

Charge storage of Mo/Ti based MXenes for electrochemical capacitor application

Popis výsledku anglicky

This study provides insight into the preparation and energy storage response of double-transition metal carbides. Controlling etching parameters allows us to prepare Mo/Ti-based carbides with different energy storage performance. Effective strategies were employed to design MXene cells with more optimized and practical electrochemical performance. High-mass loading electrodes were integrated into symmetric and asymmetric systems using aqueous electrolytes with a wide pH range. Various alternatives, including asymmetric cell assembly, redox-active electrolytes, and replacing (+) MXene electrode by carbon electrode, were tested to improve the charge storage of the positive electrode, thereby improving the full cell response. In acidic media, an asymmetric cell based on (-) MXene and (+) BP2000 carbon black showed a high cell voltage (1.3 V) and a long cyclability (8000 cycles at 1 A g- 1) compared to the symmetric cell (0.8 V). We further showed that the cell capacitance in 1 M NaI can be significantly enhanced once (+) MXene is replaced by carbon black or activated carbon.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

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

Electrochimica acta

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

535

Číslo periodika v rámci svazku

Sept

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

146691

Kód UT WoS článku

001512874900001

EID výsledku v databázi Scopus

2-s2.0-105007968732