Construction of hierarchical CuO/Cu2O@NiCo2S4 Nanowire arrays on copper foam for high performance supercapacitor electrodes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F17%3A63517166" target="_blank" >RIV/70883521:28610/17:63517166 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3390/nano7090273" target="_blank" >http://dx.doi.org/10.3390/nano7090273</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/nano7090273" target="_blank" >10.3390/nano7090273</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Construction of hierarchical CuO/Cu2O@NiCo2S4 Nanowire arrays on copper foam for high performance supercapacitor electrodes

Popis výsledku v původním jazyce

Hierarchical copper oxide @ ternary nickel cobalt sulfide (CuO/Cu2O@NiCo2S4) core-shell nanowire arrays on Cu foam have been successfully constructed by a facile two-step strategy. Vertically aligned CuO/Cu2O nanowire arrays are firstly grown on Cu foam by one-step thermal oxidation of Cu foam, followed by electrodeposition of NiCo2S4 nanosheets on the surface of CuO/Cu2O nanowires to form the CuO/Cu2O@NiCo2S4 core-shell nanostructures. Structural and morphological characterizations indicate that the average thickness of the NiCo2S4 nanosheets is ~20 nm and the diameter of CuO/Cu2O core is ~50 nm. Electrochemical properties of the hierarchical composites as integrated binder-free electrodes for supercapacitor were evaluated by various electrochemical methods. The hierarchical composite electrodes could achieve ultrahigh specific capacitance of 3.186 F cm-2 at 10 mA cm-2, good rate capability (82.06% capacitance retention at the current density from 2 to 50 mA cm-2) and excellent cycling stability, with capacitance retention of 96.73% after 2000 cycles at 10 mA cm-2. These results demonstrate the significance of optimized design and fabrication of electrode materials with more sufficient electrolyte-electrode interface, robust structural integrity and fast ion/electron transfer.

Název v anglickém jazyce

Construction of hierarchical CuO/Cu2O@NiCo2S4 Nanowire arrays on copper foam for high performance supercapacitor electrodes

Popis výsledku anglicky

Hierarchical copper oxide @ ternary nickel cobalt sulfide (CuO/Cu2O@NiCo2S4) core-shell nanowire arrays on Cu foam have been successfully constructed by a facile two-step strategy. Vertically aligned CuO/Cu2O nanowire arrays are firstly grown on Cu foam by one-step thermal oxidation of Cu foam, followed by electrodeposition of NiCo2S4 nanosheets on the surface of CuO/Cu2O nanowires to form the CuO/Cu2O@NiCo2S4 core-shell nanostructures. Structural and morphological characterizations indicate that the average thickness of the NiCo2S4 nanosheets is ~20 nm and the diameter of CuO/Cu2O core is ~50 nm. Electrochemical properties of the hierarchical composites as integrated binder-free electrodes for supercapacitor were evaluated by various electrochemical methods. The hierarchical composite electrodes could achieve ultrahigh specific capacitance of 3.186 F cm-2 at 10 mA cm-2, good rate capability (82.06% capacitance retention at the current density from 2 to 50 mA cm-2) and excellent cycling stability, with capacitance retention of 96.73% after 2000 cycles at 10 mA cm-2. These results demonstrate the significance of optimized design and fabrication of electrode materials with more sufficient electrolyte-electrode interface, robust structural integrity and fast ion/electron transfer.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Nanomaterials

ISSN

2079-4991

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

000411522600042

EID výsledku v databázi Scopus

2-s2.0-85029754870