Phase transformation of alpha-MnO2 to beta-MnO2 induced by Cu doping: Improved electrochemical performance for next generation supercapacitor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F23%3AA2402LEE" target="_blank" >RIV/61988987:17310/23:A2402LEE - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0921510723003227?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0921510723003227?via%3Dihub</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Phase transformation of alpha-MnO2 to beta-MnO2 induced by Cu doping: Improved electrochemical performance for next generation supercapacitor

Popis výsledku v původním jazyce

With the advent of wearable/portable electronics and hybrid electric vehicles, supercapacitors have gained much interest owing to their high-power density. This work deals with ultralong MnO2 nanowires reinforced with different Cu contents as a new electrode material for supercapacitors fabrication. X-ray diffraction (XRD) results showed the MnO2 phase transformation from alpha-MnO2 to beta- MnO2 induced by Cu doping. beta-MnO2 due to its highest structural stability is expected to show the excellent cyclic stability of the electrode material. Field emission scanning electron microscopy (FESEM) confirmed the ultralong nanowires morphology. Ultralong nanowires with extremely interconnected network enable efficient electron transport between them, further enhancing the electrical conductivity of the material. Redox peaks present in the CV profile revealed that the preferred charge storage follows faradic mechanism, which was further confirmed by rate law. Nanosized morphology and spongy structure of the current collector exposed the maximal electrode area in conjunction with shielding from electrode pulverization.

Název v anglickém jazyce

Phase transformation of alpha-MnO2 to beta-MnO2 induced by Cu doping: Improved electrochemical performance for next generation supercapacitor

Popis výsledku anglicky

With the advent of wearable/portable electronics and hybrid electric vehicles, supercapacitors have gained much interest owing to their high-power density. This work deals with ultralong MnO2 nanowires reinforced with different Cu contents as a new electrode material for supercapacitors fabrication. X-ray diffraction (XRD) results showed the MnO2 phase transformation from alpha-MnO2 to beta- MnO2 induced by Cu doping. beta-MnO2 due to its highest structural stability is expected to show the excellent cyclic stability of the electrode material. Field emission scanning electron microscopy (FESEM) confirmed the ultralong nanowires morphology. Ultralong nanowires with extremely interconnected network enable efficient electron transport between them, further enhancing the electrical conductivity of the material. Redox peaks present in the CV profile revealed that the preferred charge storage follows faradic mechanism, which was further confirmed by rate law. Nanosized morphology and spongy structure of the current collector exposed the maximal electrode area in conjunction with shielding from electrode pulverization.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10400 - Chemical sciences

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

MAT SCI ENG B-SOLID

ISSN

0921-5107

e-ISSN

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Svazek periodika

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Číslo periodika v rámci svazku

116580

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

001010005300001

EID výsledku v databázi Scopus

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