Enhancing the supercapacitor performance of flexible MnOxCarbon cloth electrodes by Pd-decoration

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F18%3A63521385" target="_blank" >RIV/70883521:28110/18:63521385 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/70883521:28610/18:63521385

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013468618306583?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468618306583?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2018.03.143" target="_blank" >10.1016/j.electacta.2018.03.143</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhancing the supercapacitor performance of flexible MnOxCarbon cloth electrodes by Pd-decoration

Popis výsledku v původním jazyce

Manganese oxide (MnOx)-based hybrid electrode materials have been designed by electrochemical deposition on carbon cloth preliminary activated by palladium (Pd) nanoparticles. The synthesis conditions (current density, deposition time) were chosen in such a way as to achieve a stable structure of MnOx with a large surface area. The structural parameters and surface morphology of materials obtained are characterized by Scanning Electron and Transmission Electron Microscopy (SEM, TEM), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS), etc. The electrochemical behavior was investigated by cyclic voltammetry, galvanostatic charge/discharge and impedance spectroscopy. The attained results indicate that MnOx deposits reviled birnessite-type structural feature. Apart from that, the morphology of MnOx transformed with increasing of current density from needlelike structure to loosely-packed thin sheets and then to closed-packed thicker sheets structures. Different morphology exhibits different specific surface area and electrochemical efficiency. Hence electrochemical analysis reviled the highest specific capacitance (186 F g−1) and cyclic stability for MnOxPdCC with obtained at current density of 1 mA cm−2. It can be explained by the formation of a less dense structure of MnOx (loosely-packed thin sheets) with large specific surface area and thus better permeability for Na+ and SO4 −2 ions. As to the role of Pd, its nanoparticles deposited on CC can play a dual role, namely electron conducting passway between CC and MnOx and structure–guiding agent of manganese oxides nucleation and grows.

Název v anglickém jazyce

Enhancing the supercapacitor performance of flexible MnOxCarbon cloth electrodes by Pd-decoration

Popis výsledku anglicky

Manganese oxide (MnOx)-based hybrid electrode materials have been designed by electrochemical deposition on carbon cloth preliminary activated by palladium (Pd) nanoparticles. The synthesis conditions (current density, deposition time) were chosen in such a way as to achieve a stable structure of MnOx with a large surface area. The structural parameters and surface morphology of materials obtained are characterized by Scanning Electron and Transmission Electron Microscopy (SEM, TEM), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS), etc. The electrochemical behavior was investigated by cyclic voltammetry, galvanostatic charge/discharge and impedance spectroscopy. The attained results indicate that MnOx deposits reviled birnessite-type structural feature. Apart from that, the morphology of MnOx transformed with increasing of current density from needlelike structure to loosely-packed thin sheets and then to closed-packed thicker sheets structures. Different morphology exhibits different specific surface area and electrochemical efficiency. Hence electrochemical analysis reviled the highest specific capacitance (186 F g−1) and cyclic stability for MnOxPdCC with obtained at current density of 1 mA cm−2. It can be explained by the formation of a less dense structure of MnOx (loosely-packed thin sheets) with large specific surface area and thus better permeability for Na+ and SO4 −2 ions. As to the role of Pd, its nanoparticles deposited on CC can play a dual role, namely electron conducting passway between CC and MnOx and structure–guiding agent of manganese oxides nucleation and grows.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

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

—

Svazek periodika

272

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000430690200001

EID výsledku v databázi Scopus

2-s2.0-85045018770