Layered MXene-transition metal oxide nanocomposite revealing its versatility in methanol oxidation and PVA/KOH hydrogel-based symmetric supercapacitor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F25%3A43974547" target="_blank" >RIV/49777513:23640/25:43974547 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.worldscientific.com/doi/10.1142/S0217979225400478" target="_blank" >https://www.worldscientific.com/doi/10.1142/S0217979225400478</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S0217979225400478" target="_blank" >10.1142/S0217979225400478</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Layered MXene-transition metal oxide nanocomposite revealing its versatility in methanol oxidation and PVA/KOH hydrogel-based symmetric supercapacitor

Popis výsledku v původním jazyce

To find a solution to the global energy demand, efficient energy production and storage devices are utmost required. Taking advantage of the unique combination of hydrophilicity and conductivity of MXene, a bifunctional nonnoble metal-based electrode NiCo2O4/NiO/MXene (CNOT) is developed. Low conductivity and aggregation of transition metal oxides are compensated by making a hybrid of NiCo2O4/NiO with MXene. CNOT, as an anode catalyst in direct methanol fuel cell (DMFC), offers methanol oxidation reaction current density of 15 A/g and low onset potential. Symmetric supercapacitor developed using CNOT in 3 M KOH solution offers 0.9 V potential window, and 32.66 Fg − 1 specific capacitance at 2.5 A/g. Whereas, symmetric supercapacitor CNOT//CNOT in PVA/KOH hydrogel polymer electrolyte provides a broader window of 1.4 V, with specific capacitance of 87.331 Fg − 1 , and very high energy and power density of 23.77 Wh/kg and 1808.87 W/kg, respectively, at 2.5 A/g. The hydrogel polymer electrolyte (PVA/KOH) outperforms aqueous 3 M KOH by providing a larger window, higher capacitance, excellent energy and power density. Thus, the hybrid electrode provides synergistic effects of the electro-active NiCo2O4, NiO and MXene nanosheets and exhibits versatility in DMFC and symmetric supercapacitor.

Název v anglickém jazyce

Layered MXene-transition metal oxide nanocomposite revealing its versatility in methanol oxidation and PVA/KOH hydrogel-based symmetric supercapacitor

Popis výsledku anglicky

To find a solution to the global energy demand, efficient energy production and storage devices are utmost required. Taking advantage of the unique combination of hydrophilicity and conductivity of MXene, a bifunctional nonnoble metal-based electrode NiCo2O4/NiO/MXene (CNOT) is developed. Low conductivity and aggregation of transition metal oxides are compensated by making a hybrid of NiCo2O4/NiO with MXene. CNOT, as an anode catalyst in direct methanol fuel cell (DMFC), offers methanol oxidation reaction current density of 15 A/g and low onset potential. Symmetric supercapacitor developed using CNOT in 3 M KOH solution offers 0.9 V potential window, and 32.66 Fg − 1 specific capacitance at 2.5 A/g. Whereas, symmetric supercapacitor CNOT//CNOT in PVA/KOH hydrogel polymer electrolyte provides a broader window of 1.4 V, with specific capacitance of 87.331 Fg − 1 , and very high energy and power density of 23.77 Wh/kg and 1808.87 W/kg, respectively, at 2.5 A/g. The hydrogel polymer electrolyte (PVA/KOH) outperforms aqueous 3 M KOH by providing a larger window, higher capacitance, excellent energy and power density. Thus, the hybrid electrode provides synergistic effects of the electro-active NiCo2O4, NiO and MXene nanosheets and exhibits versatility in DMFC and symmetric supercapacitor.

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

INTERNATIONAL JOURNAL OF MODERN PHYSICS B

ISSN

0217-9792

e-ISSN

1793-6578

Svazek periodika

39

Číslo periodika v rámci svazku

05

Stát vydavatele periodika

SG - Singapurská republika

Počet stran výsledku

24

Strana od-do

nestránkováno

Kód UT WoS článku

001321382300003

EID výsledku v databázi Scopus

2-s2.0-86000429206