Hydrothermal synthesis of ZnWO4–MnO2 nanopowder doped with carbon black nanoparticles for high-performance supercapacitor applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F19%3A43958737" target="_blank" >RIV/49777513:23640/19:43958737 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s10854-019-02498-0" target="_blank" >https://doi.org/10.1007/s10854-019-02498-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10854-019-02498-0" target="_blank" >10.1007/s10854-019-02498-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrothermal synthesis of ZnWO4–MnO2 nanopowder doped with carbon black nanoparticles for high-performance supercapacitor applications

Popis výsledku v původním jazyce

A two-step hydrothermal method was employed to synthesize ZnWO4–MnO2 nanopowder with a high degree of crystallinity as revealed by X-ray diffraction studies. The synthesized nanopowder exhibits nanorod-type structure as revealed by high-resolution transmission microscopy with selected area electron diffraction pattern, confirming the crystalline behaviour. The electrochemical behaviour of the symmetrically fabricated electrodes using ZnWO4–MnO2 as active materials along with doped carbon black was investigated by means of cyclic voltammetry (CV), galvanostatic charge/discharge profiling and electrochemical impedance spectroscopy in the potential window of 0–1 V. The electrochemical analysis was carried out using 2 M KOH electrolyte. The fabricated electrodes showed better electrochemical behaviour with maximum specific capacitance of 714 F g−1 at a scan rate of 5 mV s−1 as demonstrated by CV curves. The capacitance obtained from CV measurements depicts dominant electrostatic double layer behaviour. The maximum specific capacitance of 690.6 F g−1 at a current density of 1 A g−1 was attained from charge/discharge profiling. In addition, the electrodes showed an energy density of 289.17 Wh kg−1 at a power density of 547.90 W kg−1 at the same current density. Furthermore, after undergoing 5000 charging/discharging cycles, the fabricated electrodes retained 94.5% of its initial capacity, thereby yielding Coulombic efficiency of 81.7%.

Název v anglickém jazyce

Hydrothermal synthesis of ZnWO4–MnO2 nanopowder doped with carbon black nanoparticles for high-performance supercapacitor applications

Popis výsledku anglicky

A two-step hydrothermal method was employed to synthesize ZnWO4–MnO2 nanopowder with a high degree of crystallinity as revealed by X-ray diffraction studies. The synthesized nanopowder exhibits nanorod-type structure as revealed by high-resolution transmission microscopy with selected area electron diffraction pattern, confirming the crystalline behaviour. The electrochemical behaviour of the symmetrically fabricated electrodes using ZnWO4–MnO2 as active materials along with doped carbon black was investigated by means of cyclic voltammetry (CV), galvanostatic charge/discharge profiling and electrochemical impedance spectroscopy in the potential window of 0–1 V. The electrochemical analysis was carried out using 2 M KOH electrolyte. The fabricated electrodes showed better electrochemical behaviour with maximum specific capacitance of 714 F g−1 at a scan rate of 5 mV s−1 as demonstrated by CV curves. The capacitance obtained from CV measurements depicts dominant electrostatic double layer behaviour. The maximum specific capacitance of 690.6 F g−1 at a current density of 1 A g−1 was attained from charge/discharge profiling. In addition, the electrodes showed an energy density of 289.17 Wh kg−1 at a power density of 547.90 W kg−1 at the same current density. Furthermore, after undergoing 5000 charging/discharging cycles, the fabricated electrodes retained 94.5% of its initial capacity, thereby yielding Coulombic efficiency of 81.7%.

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

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

ISSN

0957-4522

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

21250-21258

Kód UT WoS článku

000495975900005

EID výsledku v databázi Scopus

2-s2.0-85075003861